From 7139bc1579901b53db7e898789e916ee2fb52d78 Mon Sep 17 00:00:00 2001
From: John David Anglin <dave.anglin@bell.net>
Date: Mon, 14 Jan 2013 19:45:00 -0500
Subject: [PATCH 01/31] [PARISC] Purge existing TLB entries in set_pte_at and
 ptep_set_wrprotect
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This patch goes a long way toward fixing the minifail bug, and
it  significantly improves the stability of SMP machines such as
the rp3440.  When write  protecting a page for COW, we need to
purge the existing translation.  Otherwise, the COW break
doesn't occur as expected because the TLB may still have a stale entry
which allows writes.

[jejb: fix up checkpatch errors]
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Cc: stable@vger.kernel.org
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
---
 arch/parisc/include/asm/pgtable.h | 13 ++++++++++---
 arch/parisc/kernel/cache.c        | 18 ++++++++++++++++++
 2 files changed, 28 insertions(+), 3 deletions(-)

diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h
index ee99f2339356..7df49fad29f9 100644
--- a/arch/parisc/include/asm/pgtable.h
+++ b/arch/parisc/include/asm/pgtable.h
@@ -12,11 +12,10 @@
 
 #include <linux/bitops.h>
 #include <linux/spinlock.h>
+#include <linux/mm_types.h>
 #include <asm/processor.h>
 #include <asm/cache.h>
 
-struct vm_area_struct;
-
 /*
  * kern_addr_valid(ADDR) tests if ADDR is pointing to valid kernel
  * memory.  For the return value to be meaningful, ADDR must be >=
@@ -40,7 +39,14 @@ struct vm_area_struct;
         do{                                                     \
                 *(pteptr) = (pteval);                           \
         } while(0)
-#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
+
+extern void purge_tlb_entries(struct mm_struct *, unsigned long);
+
+#define set_pte_at(mm, addr, ptep, pteval)                      \
+	do {                                                    \
+		set_pte(ptep, pteval);                          \
+		purge_tlb_entries(mm, addr);                    \
+	} while (0)
 
 #endif /* !__ASSEMBLY__ */
 
@@ -466,6 +472,7 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
 		old = pte_val(*ptep);
 		new = pte_val(pte_wrprotect(__pte (old)));
 	} while (cmpxchg((unsigned long *) ptep, old, new) != old);
+	purge_tlb_entries(mm, addr);
 #else
 	pte_t old_pte = *ptep;
 	set_pte_at(mm, addr, ptep, pte_wrprotect(old_pte));
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
index 48e16dc20102..b89a85ab945e 100644
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -419,6 +419,24 @@ void kunmap_parisc(void *addr)
 EXPORT_SYMBOL(kunmap_parisc);
 #endif
 
+void purge_tlb_entries(struct mm_struct *mm, unsigned long addr)
+{
+	unsigned long flags;
+
+	/* Note: purge_tlb_entries can be called at startup with
+	   no context.  */
+
+	/* Disable preemption while we play with %sr1.  */
+	preempt_disable();
+	mtsp(mm->context, 1);
+	purge_tlb_start(flags);
+	pdtlb(addr);
+	pitlb(addr);
+	purge_tlb_end(flags);
+	preempt_enable();
+}
+EXPORT_SYMBOL(purge_tlb_entries);
+
 void __flush_tlb_range(unsigned long sid, unsigned long start,
 		       unsigned long end)
 {

From 6c700d71f7faecb540b3fa4303edb5323a2768c1 Mon Sep 17 00:00:00 2001
From: Geert Uytterhoeven <geert@linux-m68k.org>
Date: Fri, 28 Dec 2012 21:28:09 +0100
Subject: [PATCH 02/31] [PARISC] hpux: Remove obsolete regs parameter from
 do_execve() in hpux_execve()

commit da3d4c5fa56236dd924d77ffc4f982356816b93b ("get rid of pt_regs
argument of do_execve()") removed the parameter, but forgot to update
hpux_execve():

arch/parisc/hpux/fs.c: In function 'hpux_execve':
arch/parisc/hpux/fs.c:47:6: error: too many arguments to function 'do_execve'

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
---
 arch/parisc/hpux/fs.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/parisc/hpux/fs.c b/arch/parisc/hpux/fs.c
index a0760b87fd4e..838b479a42c4 100644
--- a/arch/parisc/hpux/fs.c
+++ b/arch/parisc/hpux/fs.c
@@ -43,8 +43,7 @@ int hpux_execve(struct pt_regs *regs)
 
 	error = do_execve(filename->name,
 			  (const char __user *const __user *) regs->gr[25],
-			  (const char __user *const __user *) regs->gr[24],
-			  regs);
+			  (const char __user *const __user *) regs->gr[24]);
 
 	putname(filename);
 

From 0e39718b988b84860a6c291a2c82c9cb75e3b8a9 Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Thu, 31 Jan 2013 22:04:12 +0000
Subject: [PATCH 03/31] parisc: enhance automatic CONFIG_CROSS_COMPILE
 detection

The current Makefile will only choose the hppa64 cross compiler when
running natively on hppa in a 32bit userspace.
This patch additionally chooses the correct 32/64 bit hppa compiler even
when doing real cross compiling to hppa/hppa64 from another architecture.

Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/Makefile | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/arch/parisc/Makefile b/arch/parisc/Makefile
index 5707f1a62341..87f64d6b5dcb 100644
--- a/arch/parisc/Makefile
+++ b/arch/parisc/Makefile
@@ -32,11 +32,6 @@ ifdef CONFIG_64BIT
 UTS_MACHINE	:= parisc64
 CHECKFLAGS	+= -D__LP64__=1 -m64
 WIDTH		:= 64
-
-# FIXME: if no default set, should really try to locate dynamically
-ifeq ($(CROSS_COMPILE),)
-CROSS_COMPILE	:= hppa64-linux-gnu-
-endif
 else # 32-bit
 WIDTH		:=
 endif
@@ -44,6 +39,10 @@ endif
 # attempt to help out folks who are cross-compiling
 ifeq ($(NATIVE),1)
 CROSS_COMPILE	:= hppa$(WIDTH)-linux-
+else
+ ifeq ($(CROSS_COMPILE),)
+ CROSS_COMPILE	:= hppa$(WIDTH)-linux-gnu-
+ endif
 endif
 
 OBJCOPY_FLAGS =-O binary -R .note -R .comment -S

From 1c4c6597b67f9986a09b34deb337a8b14f4adf3a Mon Sep 17 00:00:00 2001
From: John David Anglin <dave.anglin@bell.net>
Date: Sun, 13 Jan 2013 22:04:18 +0000
Subject: [PATCH 04/31] parisc: Fix comment describing setup of access rights
 in entry.S

This comment describes incredibly subtle code, so it should be right!

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/kernel/entry.S | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index eb7850b46c25..7c9648919c91 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -483,7 +483,7 @@
 	 * B <-> _PAGE_DMB (memory break)
 	 *
 	 * Then incredible subtlety: The access rights are
-	 * _PAGE_GATEWAY _PAGE_EXEC _PAGE_READ
+	 * _PAGE_GATEWAY, _PAGE_EXEC and _PAGE_WRITE
 	 * See 3-14 of the parisc 2.0 manual
 	 *
 	 * Finally, _PAGE_READ goes in the top bit of PL1 (so we
@@ -493,7 +493,7 @@
 
 	/* PAGE_USER indicates the page can be read with user privileges,
 	 * so deposit X1|11 to PL1|PL2 (remember the upper bit of PL1
-	 * contains _PAGE_READ */
+	 * contains _PAGE_READ) */
 	extrd,u,*=      \pte,_PAGE_USER_BIT+32,1,%r0
 	depdi		7,11,3,\prot
 	/* If we're a gateway page, drop PL2 back to zero for promotion

From ec758f98328da3eb933a25dc7a2eed01ef44d849 Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Thu, 31 Jan 2013 21:44:28 +0000
Subject: [PATCH 05/31] parisc: add CONFIG_MLONGCALLS option to enable linkage
 of huge vmlinux executables

When building a 64bit kernel which includes all necessary drivers and
filesystems the vmlinux kernel often gets so huge, that the linker won't
be able to resolve the branch stubs. This patch overcomes this limit by
providing an option to compile the kernel with the -mlong-calls compiler
option.

Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/Kconfig  | 17 +++++++++++++++++
 arch/parisc/Makefile |  4 ++++
 2 files changed, 21 insertions(+)

diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index b77feffbadea..3df1c35a217a 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -161,6 +161,23 @@ config PREFETCH
 	def_bool y
 	depends on PA8X00 || PA7200
 
+config MLONGCALLS
+	bool "Enable the -mlong-calls compiler option for big kernels"
+	def_bool y if (!MODULES)
+	depends on PA8X00
+	help
+	  If you configure the kernel to include many drivers built-in instead
+	  as modules, the kernel executable may become too big, so that the
+	  linker will not be able to resolve some long branches and fails to link
+	  your vmlinux kernel. In that case enabling this option will help you
+	  to overcome this limit by using the -mlong-calls compiler option.
+
+	  Usually you want to say N here, unless you e.g. want to build
+	  a kernel which includes all necessary drivers built-in and which can
+	  be used for TFTP booting without the need to have an initrd ramdisk.
+
+	  Enabling this option will probably slow down your kernel.
+
 config 64BIT
 	bool "64-bit kernel"
 	depends on PA8X00
diff --git a/arch/parisc/Makefile b/arch/parisc/Makefile
index 87f64d6b5dcb..ed9a14ccd066 100644
--- a/arch/parisc/Makefile
+++ b/arch/parisc/Makefile
@@ -64,6 +64,10 @@ ifndef CONFIG_FUNCTION_TRACER
   cflags-y	+= -ffunction-sections
 endif
 
+# Use long jumps instead of long branches (needed if your linker fails to
+# link a too big vmlinux executable)
+cflags-$(CONFIG_MLONGCALLS)	+= -mlong-calls
+
 # select which processor to optimise for
 cflags-$(CONFIG_PA7100)		+= -march=1.1 -mschedule=7100
 cflags-$(CONFIG_PA7200)		+= -march=1.1 -mschedule=7200

From fbd48433e79a6439264448c8e85c4816f5b32694 Mon Sep 17 00:00:00 2001
From: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Date: Sun, 2 Sep 2012 14:23:59 +0000
Subject: [PATCH 06/31] parisc: fix possible memory leak in pat_query_module()

pa_pdc_cell has been allocated in this function and so should be
freed before leaving from the error handling cases.

spatch with a semantic match is used to found this problem.
(http://coccinelle.lip6.fr/)

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/kernel/inventory.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/parisc/kernel/inventory.c b/arch/parisc/kernel/inventory.c
index 08324aac3544..3295ef4a185d 100644
--- a/arch/parisc/kernel/inventory.c
+++ b/arch/parisc/kernel/inventory.c
@@ -186,12 +186,14 @@ pat_query_module(ulong pcell_loc, ulong mod_index)
 
 	if (status != PDC_OK) {
 		/* no more cell modules or error */
+		kfree(pa_pdc_cell);
 		return status;
 	}
 
 	temp = pa_pdc_cell->cba;
 	dev = alloc_pa_dev(PAT_GET_CBA(temp), &(pa_pdc_cell->mod_path));
 	if (!dev) {
+		kfree(pa_pdc_cell);
 		return PDC_OK;
 	}
 

From 3fad9b8d597f3a901fde947fc531886f685652c7 Mon Sep 17 00:00:00 2001
From: Joe Perches <joe@perches.com>
Date: Fri, 12 Nov 2010 21:38:00 +0000
Subject: [PATCH 07/31] drivers/parisc: Use printf extension %pR for struct
 resource

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Helge Deller <deller@gmx.de>
---
 drivers/parisc/dino.c | 13 +++++--------
 drivers/parisc/hppb.c |  6 ++----
 2 files changed, 7 insertions(+), 12 deletions(-)

diff --git a/drivers/parisc/dino.c b/drivers/parisc/dino.c
index 8e4e86b78428..9eae9834bcc7 100644
--- a/drivers/parisc/dino.c
+++ b/drivers/parisc/dino.c
@@ -580,15 +580,13 @@ dino_fixup_bus(struct pci_bus *bus)
 				
 			}
 					
-			DBG("DEBUG %s assigning %d [0x%lx,0x%lx]\n",
+			DBG("DEBUG %s assigning %d [%pR]\n",
 			    dev_name(&bus->self->dev), i,
-			    bus->self->resource[i].start,
-			    bus->self->resource[i].end);
+			    &bus->self->resource[i]);
 			WARN_ON(pci_assign_resource(bus->self, i));
-			DBG("DEBUG %s after assign %d [0x%lx,0x%lx]\n",
+			DBG("DEBUG %s after assign %d [%pR]\n",
 			    dev_name(&bus->self->dev), i,
-			    bus->self->resource[i].start,
-			    bus->self->resource[i].end);
+			    &bus->self->resource[i]);
 		}
 	}
 
@@ -772,8 +770,7 @@ dino_bridge_init(struct dino_device *dino_dev, const char *name)
 		result = ccio_request_resource(dino_dev->hba.dev, &res[i]);
 		if (result < 0) {
 			printk(KERN_ERR "%s: failed to claim PCI Bus address "
-			       "space %d (0x%lx-0x%lx)!\n", name, i,
-			       (unsigned long)res[i].start, (unsigned long)res[i].end);
+			       "space %d (%pR)!\n", name, i, &res[i]);
 			return result;
 		}
 	}
diff --git a/drivers/parisc/hppb.c b/drivers/parisc/hppb.c
index 815db175d427..898208e4f302 100644
--- a/drivers/parisc/hppb.c
+++ b/drivers/parisc/hppb.c
@@ -74,10 +74,8 @@ static int hppb_probe(struct parisc_device *dev)
 
 	status = ccio_request_resource(dev, &card->mmio_region);
 	if(status < 0) {
-		printk(KERN_ERR "%s: failed to claim HP-PB "
-			"bus space (0x%08llx, 0x%08llx)\n",
-			__FILE__, (unsigned long long) card->mmio_region.start,
-			(unsigned long long) card->mmio_region.end);
+		printk(KERN_ERR "%s: failed to claim HP-PB bus space (%pR)\n",
+			__FILE__, &card->mmio_region);
 	}
 
         return 0;

From 93c3e913e104c9277e32a0d7e03f268d146c57ee Mon Sep 17 00:00:00 2001
From: Julia Lawall <Julia.Lawall@lip6.fr>
Date: Sat, 3 Nov 2012 10:58:36 +0000
Subject: [PATCH 08/31] drivers/parisc/pdc_stable.c: use WARN

Use WARN rather than printk followed by WARN_ON(1), for conciseness.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Helge Deller <deller@gmx.de>
---
 drivers/parisc/pdc_stable.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/parisc/pdc_stable.c b/drivers/parisc/pdc_stable.c
index 246a92f677e4..0f54ab6260df 100644
--- a/drivers/parisc/pdc_stable.c
+++ b/drivers/parisc/pdc_stable.c
@@ -212,12 +212,10 @@ pdcspath_store(struct pdcspath_entry *entry)
 			entry, devpath, entry->addr);
 
 	/* addr, devpath and count must be word aligned */
-	if (pdc_stable_write(entry->addr, devpath, sizeof(*devpath)) != PDC_OK) {
-		printk(KERN_ERR "%s: an error occurred when writing to PDC.\n"
+	if (pdc_stable_write(entry->addr, devpath, sizeof(*devpath)) != PDC_OK)
+		WARN(1, KERN_ERR "%s: an error occurred when writing to PDC.\n"
 				"It is likely that the Stable Storage data has been corrupted.\n"
 				"Please check it carefully upon next reboot.\n", __func__);
-		WARN_ON(1);
-	}
 		
 	/* kobject is already registered */
 	entry->ready = 2;

From 7633453978c54874849c5f40487ac9e14d43fc12 Mon Sep 17 00:00:00 2001
From: John David Anglin <dave.anglin@bell.net>
Date: Sun, 3 Feb 2013 22:59:09 +0000
Subject: [PATCH 09/31] parisc: fixes and cleanups in page cache flushing (1/4)

This is the first patch in a series of 4, with which the page cache flushing of
parisc will gets fixed and enhanced. This even fixes the nasty "minifail" bug
(http://wiki.parisc-linux.org/TestCases?highlight=%28minifail%29) which
prevented parisc to stay an official debian port.  Basically the flush in
copy_user_page together with the TLB patch from commit
7139bc1579901b53db7e898789e916ee2fb52d78 is what fixes the minifail bug.

This patch still uses the TMPALIAS approach.  The new copy_user_page
implementation calls flush_dcache_page_asm to flush the user dcache page
(crucial for minifail fix) via a kernel TMPALIAS mapping.  After that, it just
copies the page using the kernel mapping.  It does a final flush if needed.
Generally it is hard to avoid doing some cache flushes using the kernel mapping
(e.g., copy_to_user_page and copy_from_user_page).

This patch depends on a subsequent change to pacache.S implementing
clear_page_asm and copy_page_asm.  These are optimized routines to clear and
copy a page.  The calls in clear_user_page and copy_user_page could be replaced
by calls to memset and memcpy, respectively.  I tested prefetch optimizations
in clear_page_asm and copy_page_asm but didn't see any significant performance
improvement on rp3440.  I'm not sure if these are routines are significantly
faster than memset and/or memcpy, but they are there for further performance
evaluation.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/include/asm/page.h    | 20 +++++++++---
 arch/parisc/kernel/cache.c        | 51 +++++++++++++------------------
 arch/parisc/kernel/parisc_ksyms.c |  5 +--
 3 files changed, 41 insertions(+), 35 deletions(-)

diff --git a/arch/parisc/include/asm/page.h b/arch/parisc/include/asm/page.h
index 4e0e7dbf0f3f..b7adb2ac049c 100644
--- a/arch/parisc/include/asm/page.h
+++ b/arch/parisc/include/asm/page.h
@@ -21,15 +21,27 @@
 #include <asm/types.h>
 #include <asm/cache.h>
 
-#define clear_page(page)	memset((void *)(page), 0, PAGE_SIZE)
-#define copy_page(to,from)      copy_user_page_asm((void *)(to), (void *)(from))
+#define clear_page(page)	clear_page_asm((void *)(page))
+#define copy_page(to, from)	copy_page_asm((void *)(to), (void *)(from))
 
 struct page;
 
-void copy_user_page_asm(void *to, void *from);
+void clear_page_asm(void *page);
+void copy_page_asm(void *to, void *from);
+void clear_user_page(void *vto, unsigned long vaddr, struct page *pg);
 void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
 			   struct page *pg);
-void clear_user_page(void *page, unsigned long vaddr, struct page *pg);
+
+/* #define CONFIG_PARISC_TMPALIAS */
+
+#ifdef CONFIG_PARISC_TMPALIAS
+void clear_user_highpage(struct page *page, unsigned long vaddr);
+#define clear_user_highpage clear_user_highpage
+struct vm_area_struct;
+void copy_user_highpage(struct page *to, struct page *from,
+	unsigned long vaddr, struct vm_area_struct *vma);
+#define __HAVE_ARCH_COPY_USER_HIGHPAGE
+#endif
 
 /*
  * These are used to make use of C type-checking..
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
index b89a85ab945e..d9cbb4b22c9f 100644
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -329,17 +329,6 @@ EXPORT_SYMBOL(flush_kernel_dcache_page_asm);
 EXPORT_SYMBOL(flush_data_cache_local);
 EXPORT_SYMBOL(flush_kernel_icache_range_asm);
 
-void clear_user_page_asm(void *page, unsigned long vaddr)
-{
-	unsigned long flags;
-	/* This function is implemented in assembly in pacache.S */
-	extern void __clear_user_page_asm(void *page, unsigned long vaddr);
-
-	purge_tlb_start(flags);
-	__clear_user_page_asm(page, vaddr);
-	purge_tlb_end(flags);
-}
-
 #define FLUSH_THRESHOLD 0x80000 /* 0.5MB */
 int parisc_cache_flush_threshold __read_mostly = FLUSH_THRESHOLD;
 
@@ -373,20 +362,9 @@ void __init parisc_setup_cache_timing(void)
 	printk(KERN_INFO "Setting cache flush threshold to %x (%d CPUs online)\n", parisc_cache_flush_threshold, num_online_cpus());
 }
 
-extern void purge_kernel_dcache_page(unsigned long);
-extern void clear_user_page_asm(void *page, unsigned long vaddr);
-
-void clear_user_page(void *page, unsigned long vaddr, struct page *pg)
-{
-	unsigned long flags;
-
-	purge_kernel_dcache_page((unsigned long)page);
-	purge_tlb_start(flags);
-	pdtlb_kernel(page);
-	purge_tlb_end(flags);
-	clear_user_page_asm(page, vaddr);
-}
-EXPORT_SYMBOL(clear_user_page);
+extern void purge_kernel_dcache_page_asm(unsigned long);
+extern void clear_user_page_asm(void *, unsigned long);
+extern void copy_user_page_asm(void *, void *, unsigned long);
 
 void flush_kernel_dcache_page_addr(void *addr)
 {
@@ -399,11 +377,26 @@ void flush_kernel_dcache_page_addr(void *addr)
 }
 EXPORT_SYMBOL(flush_kernel_dcache_page_addr);
 
-void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
-		    struct page *pg)
+void clear_user_page(void *vto, unsigned long vaddr, struct page *page)
 {
-	/* no coherency needed (all in kmap/kunmap) */
-	copy_user_page_asm(vto, vfrom);
+	clear_page_asm(vto);
+	if (!parisc_requires_coherency())
+		flush_kernel_dcache_page_asm(vto);
+}
+EXPORT_SYMBOL(clear_user_page);
+
+void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
+	struct page *pg)
+{
+	/* Copy using kernel mapping.  No coherency is needed
+	   (all in kmap/kunmap) on machines that don't support
+	   non-equivalent aliasing.  However, the `from' page
+	   needs to be flushed before it can be accessed through
+	   the kernel mapping. */
+	preempt_disable();
+	flush_dcache_page_asm(__pa(vfrom), vaddr);
+	preempt_enable();
+	copy_page_asm(vto, vfrom);
 	if (!parisc_requires_coherency())
 		flush_kernel_dcache_page_asm(vto);
 }
diff --git a/arch/parisc/kernel/parisc_ksyms.c b/arch/parisc/kernel/parisc_ksyms.c
index ceec85de6290..6795dc6c995f 100644
--- a/arch/parisc/kernel/parisc_ksyms.c
+++ b/arch/parisc/kernel/parisc_ksyms.c
@@ -157,5 +157,6 @@ extern void _mcount(void);
 EXPORT_SYMBOL(_mcount);
 #endif
 
-/* from pacache.S -- needed for copy_page */
-EXPORT_SYMBOL(copy_user_page_asm);
+/* from pacache.S -- needed for clear/copy_page */
+EXPORT_SYMBOL(clear_page_asm);
+EXPORT_SYMBOL(copy_page_asm);

From 6d2ddc2f9414d5ad0d3f014416020579ccce1baf Mon Sep 17 00:00:00 2001
From: John David Anglin <dave.anglin@bell.net>
Date: Sun, 3 Feb 2013 23:00:54 +0000
Subject: [PATCH 10/31] parisc: fixes and cleanups in page cache flushing (2/4)

Implement clear_page_asm and copy_page_asm. These are optimized routines to
clear and copy a page.  I tested prefetch optimizations in clear_page_asm and
copy_page_asm but didn't see any significant performance improvement on rp3440.
I'm not sure if these are routines are significantly faster than memset and/or
memcpy, but they are there for further performance evaluation.

TLB purge operations on PA 1.X SMP machines are now serialized with the help of
the new tlb_lock() and tlb_unlock() macros, since on some PA-RISC machines, TLB
purges need to be serialized in software.  Obviously, lock isn't needed in UP
kernels.  On PA 2.0 machines, there is a local TLB instruction which is much
less disruptive to the memory subsystem.  No lock is needed for local purge.

Loops are also unrolled in flush_instruction_cache_local and
flush_data_cache_local.

The implementation of what used to be copy_user_page (now copy_user_page_asm)
is now fixed. Additionally 64-bit support is now added. Read the preceding
comment which I didn't change.  I left the comment but it is now inaccurate.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/kernel/pacache.S | 335 ++++++++++++++++++++++++++++++-----
 1 file changed, 290 insertions(+), 45 deletions(-)

diff --git a/arch/parisc/kernel/pacache.S b/arch/parisc/kernel/pacache.S
index 5d7218ad885c..312b48422a56 100644
--- a/arch/parisc/kernel/pacache.S
+++ b/arch/parisc/kernel/pacache.S
@@ -199,7 +199,6 @@ ENTRY(flush_instruction_cache_local)
 	.callinfo NO_CALLS
 	.entry
 
-	mtsp		%r0, %sr1
 	load32		cache_info, %r1
 
 	/* Flush Instruction Cache */
@@ -208,7 +207,8 @@ ENTRY(flush_instruction_cache_local)
 	LDREG		ICACHE_STRIDE(%r1), %arg1
 	LDREG		ICACHE_COUNT(%r1), %arg2
 	LDREG		ICACHE_LOOP(%r1), %arg3
-	rsm             PSW_SM_I, %r22		/* No mmgt ops during loop*/
+	rsm		PSW_SM_I, %r22		/* No mmgt ops during loop*/
+	mtsp		%r0, %sr1
 	addib,COND(=)		-1, %arg3, fioneloop	/* Preadjust and test */
 	movb,<,n	%arg3, %r31, fisync	/* If loop < 0, do sync */
 
@@ -220,7 +220,33 @@ fimanyloop:					/* Loop if LOOP >= 2 */
 	addib,COND(<=),n	-1, %arg2, fisync	/* Outer loop decr */
 
 fioneloop:					/* Loop if LOOP = 1 */
-	addib,COND(>)		-1, %arg2, fioneloop	/* Outer loop count decr */
+	/* Some implementations may flush with a single fice instruction */
+	cmpib,COND(>>=),n	15, %arg2, fioneloop2
+
+fioneloop1:
+	fice,m		%arg1(%sr1, %arg0)
+	fice,m		%arg1(%sr1, %arg0)
+	fice,m		%arg1(%sr1, %arg0)
+	fice,m		%arg1(%sr1, %arg0)
+	fice,m		%arg1(%sr1, %arg0)
+	fice,m		%arg1(%sr1, %arg0)
+	fice,m		%arg1(%sr1, %arg0)
+	fice,m		%arg1(%sr1, %arg0)
+	fice,m		%arg1(%sr1, %arg0)
+	fice,m		%arg1(%sr1, %arg0)
+	fice,m		%arg1(%sr1, %arg0)
+	fice,m		%arg1(%sr1, %arg0)
+	fice,m		%arg1(%sr1, %arg0)
+	fice,m		%arg1(%sr1, %arg0)
+	fice,m		%arg1(%sr1, %arg0)
+	addib,COND(>)	-16, %arg2, fioneloop1
+	fice,m		%arg1(%sr1, %arg0)
+
+	/* Check if done */
+	cmpb,COND(=),n	%arg2, %r0, fisync	/* Predict branch taken */
+
+fioneloop2:
+	addib,COND(>)	-1, %arg2, fioneloop2	/* Outer loop count decr */
 	fice,m		%arg1(%sr1, %arg0)	/* Fice for one loop */
 
 fisync:
@@ -240,8 +266,7 @@ ENTRY(flush_data_cache_local)
 	.callinfo NO_CALLS
 	.entry
 
-	mtsp		%r0, %sr1
-	load32 		cache_info, %r1
+	load32		cache_info, %r1
 
 	/* Flush Data Cache */
 
@@ -249,7 +274,8 @@ ENTRY(flush_data_cache_local)
 	LDREG		DCACHE_STRIDE(%r1), %arg1
 	LDREG		DCACHE_COUNT(%r1), %arg2
 	LDREG		DCACHE_LOOP(%r1), %arg3
-	rsm		PSW_SM_I, %r22
+	rsm		PSW_SM_I, %r22		/* No mmgt ops during loop*/
+	mtsp		%r0, %sr1
 	addib,COND(=)		-1, %arg3, fdoneloop	/* Preadjust and test */
 	movb,<,n	%arg3, %r31, fdsync	/* If loop < 0, do sync */
 
@@ -261,7 +287,33 @@ fdmanyloop:					/* Loop if LOOP >= 2 */
 	addib,COND(<=),n	-1, %arg2, fdsync	/* Outer loop decr */
 
 fdoneloop:					/* Loop if LOOP = 1 */
-	addib,COND(>)		-1, %arg2, fdoneloop	/* Outer loop count decr */
+	/* Some implementations may flush with a single fdce instruction */
+	cmpib,COND(>>=),n	15, %arg2, fdoneloop2
+
+fdoneloop1:
+	fdce,m		%arg1(%sr1, %arg0)
+	fdce,m		%arg1(%sr1, %arg0)
+	fdce,m		%arg1(%sr1, %arg0)
+	fdce,m		%arg1(%sr1, %arg0)
+	fdce,m		%arg1(%sr1, %arg0)
+	fdce,m		%arg1(%sr1, %arg0)
+	fdce,m		%arg1(%sr1, %arg0)
+	fdce,m		%arg1(%sr1, %arg0)
+	fdce,m		%arg1(%sr1, %arg0)
+	fdce,m		%arg1(%sr1, %arg0)
+	fdce,m		%arg1(%sr1, %arg0)
+	fdce,m		%arg1(%sr1, %arg0)
+	fdce,m		%arg1(%sr1, %arg0)
+	fdce,m		%arg1(%sr1, %arg0)
+	fdce,m		%arg1(%sr1, %arg0)
+	addib,COND(>)	-16, %arg2, fdoneloop1
+	fdce,m		%arg1(%sr1, %arg0)
+
+	/* Check if done */
+	cmpb,COND(=),n	%arg2, %r0, fdsync	/* Predict branch taken */
+
+fdoneloop2:
+	addib,COND(>)	-1, %arg2, fdoneloop2	/* Outer loop count decr */
 	fdce,m		%arg1(%sr1, %arg0)	/* Fdce for one loop */
 
 fdsync:
@@ -277,7 +329,104 @@ ENDPROC(flush_data_cache_local)
 
 	.align	16
 
-ENTRY(copy_user_page_asm)
+/* Macros to serialize TLB purge operations on SMP.  */
+
+	.macro	tlb_lock	la,flags,tmp
+#ifdef CONFIG_SMP
+	ldil		L%pa_tlb_lock,%r1
+	ldo		R%pa_tlb_lock(%r1),\la
+	rsm		PSW_SM_I,\flags
+1:	LDCW		0(\la),\tmp
+	cmpib,<>,n	0,\tmp,3f
+2:	ldw		0(\la),\tmp
+	cmpb,<>		%r0,\tmp,1b
+	nop
+	b,n		2b
+3:
+#endif
+	.endm
+
+	.macro	tlb_unlock	la,flags,tmp
+#ifdef CONFIG_SMP
+	ldi		1,\tmp
+	stw		\tmp,0(\la)
+	mtsm		\flags
+#endif
+	.endm
+
+/* Clear page using kernel mapping.  */
+
+ENTRY(clear_page_asm)
+	.proc
+	.callinfo NO_CALLS
+	.entry
+
+#ifdef CONFIG_64BIT
+
+	/* Unroll the loop.  */
+	ldi		(PAGE_SIZE / 128), %r1
+
+1:
+	std		%r0, 0(%r26)
+	std		%r0, 8(%r26)
+	std		%r0, 16(%r26)
+	std		%r0, 24(%r26)
+	std		%r0, 32(%r26)
+	std		%r0, 40(%r26)
+	std		%r0, 48(%r26)
+	std		%r0, 56(%r26)
+	std		%r0, 64(%r26)
+	std		%r0, 72(%r26)
+	std		%r0, 80(%r26)
+	std		%r0, 88(%r26)
+	std		%r0, 96(%r26)
+	std		%r0, 104(%r26)
+	std		%r0, 112(%r26)
+	std		%r0, 120(%r26)
+
+	/* Note reverse branch hint for addib is taken.  */
+	addib,COND(>),n	-1, %r1, 1b
+	ldo		128(%r26), %r26
+
+#else
+
+	/*
+	 * Note that until (if) we start saving the full 64-bit register
+	 * values on interrupt, we can't use std on a 32 bit kernel.
+	 */
+	ldi		(PAGE_SIZE / 64), %r1
+
+1:
+	stw		%r0, 0(%r26)
+	stw		%r0, 4(%r26)
+	stw		%r0, 8(%r26)
+	stw		%r0, 12(%r26)
+	stw		%r0, 16(%r26)
+	stw		%r0, 20(%r26)
+	stw		%r0, 24(%r26)
+	stw		%r0, 28(%r26)
+	stw		%r0, 32(%r26)
+	stw		%r0, 36(%r26)
+	stw		%r0, 40(%r26)
+	stw		%r0, 44(%r26)
+	stw		%r0, 48(%r26)
+	stw		%r0, 52(%r26)
+	stw		%r0, 56(%r26)
+	stw		%r0, 60(%r26)
+
+	addib,COND(>),n	-1, %r1, 1b
+	ldo		64(%r26), %r26
+#endif
+	bv		%r0(%r2)
+	nop
+	.exit
+
+	.procend
+ENDPROC(clear_page_asm)
+
+/* Copy page using kernel mapping.  */
+
+ENTRY(copy_page_asm)
 	.proc
 	.callinfo NO_CALLS
 	.entry
@@ -285,18 +434,14 @@ ENTRY(copy_user_page_asm)
 #ifdef CONFIG_64BIT
 	/* PA8x00 CPUs can consume 2 loads or 1 store per cycle.
 	 * Unroll the loop by hand and arrange insn appropriately.
-	 * GCC probably can do this just as well.
+	 * Prefetch doesn't improve performance on rp3440.
+	 * GCC probably can do this just as well...
 	 */
 
-	ldd		0(%r25), %r19
 	ldi		(PAGE_SIZE / 128), %r1
 
-	ldw		64(%r25), %r0		/* prefetch 1 cacheline ahead */
-	ldw		128(%r25), %r0		/* prefetch 2 */
-
-1:	ldd		8(%r25), %r20
-	ldw		192(%r25), %r0		/* prefetch 3 */
-	ldw		256(%r25), %r0		/* prefetch 4 */
+1:	ldd		0(%r25), %r19
+	ldd		8(%r25), %r20
 
 	ldd		16(%r25), %r21
 	ldd		24(%r25), %r22
@@ -330,20 +475,16 @@ ENTRY(copy_user_page_asm)
 
 	ldd		112(%r25), %r21
 	ldd		120(%r25), %r22
+	ldo		128(%r25), %r25
 	std		%r19, 96(%r26)
 	std		%r20, 104(%r26)
 
-	ldo		128(%r25), %r25
 	std		%r21, 112(%r26)
 	std		%r22, 120(%r26)
-	ldo		128(%r26), %r26
 
-	/* conditional branches nullify on forward taken branch, and on
-	 * non-taken backward branch. Note that .+4 is a backwards branch.
-	 * The ldd should only get executed if the branch is taken.
-	 */
-	addib,COND(>),n	-1, %r1, 1b		/* bundle 10 */
-	ldd		0(%r25), %r19		/* start next loads */
+	/* Note reverse branch hint for addib is taken.  */
+	addib,COND(>),n	-1, %r1, 1b
+	ldo		128(%r26), %r26
 
 #else
 
@@ -399,7 +540,7 @@ ENTRY(copy_user_page_asm)
 	.exit
 
 	.procend
-ENDPROC(copy_user_page_asm)
+ENDPROC(copy_page_asm)
 
 /*
  * NOTE: Code in clear_user_page has a hard coded dependency on the
@@ -422,8 +563,6 @@ ENDPROC(copy_user_page_asm)
  *          %r23 physical page (shifted for tlb insert) of "from" translation
  */
 
-#if 0
-
 	/*
 	 * We can't do this since copy_user_page is used to bring in
 	 * file data that might have instructions. Since the data would
@@ -435,6 +574,7 @@ ENDPROC(copy_user_page_asm)
 	 * use it if more information is passed into copy_user_page().
 	 * Have to do some measurements to see if it is worthwhile to
 	 * lobby for such a change.
+	 *
 	 */
 
 ENTRY(copy_user_page_asm)
@@ -442,16 +582,21 @@ ENTRY(copy_user_page_asm)
 	.callinfo NO_CALLS
 	.entry
 
+	/* Convert virtual `to' and `from' addresses to physical addresses.
+	   Move `from' physical address to non shadowed register.  */
 	ldil		L%(__PAGE_OFFSET), %r1
 	sub		%r26, %r1, %r26
-	sub		%r25, %r1, %r23		/* move physical addr into non shadowed reg */
+	sub		%r25, %r1, %r23
 
 	ldil		L%(TMPALIAS_MAP_START), %r28
 	/* FIXME for different page sizes != 4k */
 #ifdef CONFIG_64BIT
-	extrd,u		%r26,56,32, %r26		/* convert phys addr to tlb insert format */
-	extrd,u		%r23,56,32, %r23		/* convert phys addr to tlb insert format */
-	depd		%r24,63,22, %r28		/* Form aliased virtual address 'to' */
+#if (TMPALIAS_MAP_START >= 0x80000000)
+	depdi		0, 31,32, %r28		/* clear any sign extension */
+#endif
+	extrd,u		%r26,56,32, %r26	/* convert phys addr to tlb insert format */
+	extrd,u		%r23,56,32, %r23	/* convert phys addr to tlb insert format */
+	depd		%r24,63,22, %r28	/* Form aliased virtual address 'to' */
 	depdi		0, 63,12, %r28		/* Clear any offset bits */
 	copy		%r28, %r29
 	depdi		1, 41,1, %r29		/* Form aliased virtual address 'from' */
@@ -466,10 +611,76 @@ ENTRY(copy_user_page_asm)
 
 	/* Purge any old translations */
 
+#ifdef CONFIG_PA20
+	pdtlb,l		0(%r28)
+	pdtlb,l		0(%r29)
+#else
+	tlb_lock	%r20,%r21,%r22
 	pdtlb		0(%r28)
 	pdtlb		0(%r29)
+	tlb_unlock	%r20,%r21,%r22
+#endif
 
-	ldi		64, %r1
+#ifdef CONFIG_64BIT
+	/* PA8x00 CPUs can consume 2 loads or 1 store per cycle.
+	 * Unroll the loop by hand and arrange insn appropriately.
+	 * GCC probably can do this just as well.
+	 */
+
+	ldd		0(%r29), %r19
+	ldi		(PAGE_SIZE / 128), %r1
+
+1:	ldd		8(%r29), %r20
+
+	ldd		16(%r29), %r21
+	ldd		24(%r29), %r22
+	std		%r19, 0(%r28)
+	std		%r20, 8(%r28)
+
+	ldd		32(%r29), %r19
+	ldd		40(%r29), %r20
+	std		%r21, 16(%r28)
+	std		%r22, 24(%r28)
+
+	ldd		48(%r29), %r21
+	ldd		56(%r29), %r22
+	std		%r19, 32(%r28)
+	std		%r20, 40(%r28)
+
+	ldd		64(%r29), %r19
+	ldd		72(%r29), %r20
+	std		%r21, 48(%r28)
+	std		%r22, 56(%r28)
+
+	ldd		80(%r29), %r21
+	ldd		88(%r29), %r22
+	std		%r19, 64(%r28)
+	std		%r20, 72(%r28)
+
+	ldd		 96(%r29), %r19
+	ldd		104(%r29), %r20
+	std		%r21, 80(%r28)
+	std		%r22, 88(%r28)
+
+	ldd		112(%r29), %r21
+	ldd		120(%r29), %r22
+	std		%r19, 96(%r28)
+	std		%r20, 104(%r28)
+
+	ldo		128(%r29), %r29
+	std		%r21, 112(%r28)
+	std		%r22, 120(%r28)
+	ldo		128(%r28), %r28
+
+	/* conditional branches nullify on forward taken branch, and on
+	 * non-taken backward branch. Note that .+4 is a backwards branch.
+	 * The ldd should only get executed if the branch is taken.
+	 */
+	addib,COND(>),n	-1, %r1, 1b		/* bundle 10 */
+	ldd		0(%r29), %r19		/* start next loads */
+
+#else
+	ldi		(PAGE_SIZE / 64), %r1
 
 	/*
 	 * This loop is optimized for PCXL/PCXL2 ldw/ldw and stw/stw
@@ -480,9 +691,7 @@ ENTRY(copy_user_page_asm)
 	 * use ldd/std on a 32 bit kernel.
 	 */
 
-
-1:
-	ldw		0(%r29), %r19
+1:	ldw		0(%r29), %r19
 	ldw		4(%r29), %r20
 	ldw		8(%r29), %r21
 	ldw		12(%r29), %r22
@@ -515,8 +724,10 @@ ENTRY(copy_user_page_asm)
 	stw		%r21, 56(%r28)
 	stw		%r22, 60(%r28)
 	ldo		64(%r28), %r28
+
 	addib,COND(>)		-1, %r1,1b
 	ldo		64(%r29), %r29
+#endif
 
 	bv		%r0(%r2)
 	nop
@@ -524,9 +735,8 @@ ENTRY(copy_user_page_asm)
 
 	.procend
 ENDPROC(copy_user_page_asm)
-#endif
 
-ENTRY(__clear_user_page_asm)
+ENTRY(clear_user_page_asm)
 	.proc
 	.callinfo NO_CALLS
 	.entry
@@ -550,7 +760,13 @@ ENTRY(__clear_user_page_asm)
 
 	/* Purge any old translation */
 
+#ifdef CONFIG_PA20
+	pdtlb,l		0(%r28)
+#else
+	tlb_lock	%r20,%r21,%r22
 	pdtlb		0(%r28)
+	tlb_unlock	%r20,%r21,%r22
+#endif
 
 #ifdef CONFIG_64BIT
 	ldi		(PAGE_SIZE / 128), %r1
@@ -580,8 +796,7 @@ ENTRY(__clear_user_page_asm)
 #else	/* ! CONFIG_64BIT */
 	ldi		(PAGE_SIZE / 64), %r1
 
-1:
-	stw		%r0, 0(%r28)
+1:	stw		%r0, 0(%r28)
 	stw		%r0, 4(%r28)
 	stw		%r0, 8(%r28)
 	stw		%r0, 12(%r28)
@@ -606,7 +821,7 @@ ENTRY(__clear_user_page_asm)
 	.exit
 
 	.procend
-ENDPROC(__clear_user_page_asm)
+ENDPROC(clear_user_page_asm)
 
 ENTRY(flush_dcache_page_asm)
 	.proc
@@ -630,7 +845,13 @@ ENTRY(flush_dcache_page_asm)
 
 	/* Purge any old translation */
 
+#ifdef CONFIG_PA20
+	pdtlb,l		0(%r28)
+#else
+	tlb_lock	%r20,%r21,%r22
 	pdtlb		0(%r28)
+	tlb_unlock	%r20,%r21,%r22
+#endif
 
 	ldil		L%dcache_stride, %r1
 	ldw		R%dcache_stride(%r1), %r1
@@ -663,8 +884,17 @@ ENTRY(flush_dcache_page_asm)
 	fdc,m		%r1(%r28)
 
 	sync
+
+#ifdef CONFIG_PA20
+	pdtlb,l		0(%r25)
+#else
+	tlb_lock	%r20,%r21,%r22
+	pdtlb		0(%r25)
+	tlb_unlock	%r20,%r21,%r22
+#endif
+
 	bv		%r0(%r2)
-	pdtlb		(%r25)
+	nop
 	.exit
 
 	.procend
@@ -692,7 +922,13 @@ ENTRY(flush_icache_page_asm)
 
 	/* Purge any old translation */
 
-	pitlb		(%sr4,%r28)
+#ifdef CONFIG_PA20
+	pitlb,l         %r0(%sr4,%r28)
+#else
+	tlb_lock        %r20,%r21,%r22
+	pitlb           (%sr4,%r28)
+	tlb_unlock      %r20,%r21,%r22
+#endif
 
 	ldil		L%icache_stride, %r1
 	ldw		R%icache_stride(%r1), %r1
@@ -727,8 +963,17 @@ ENTRY(flush_icache_page_asm)
 	fic,m		%r1(%sr4,%r28)
 
 	sync
+
+#ifdef CONFIG_PA20
+	pitlb,l         %r0(%sr4,%r25)
+#else
+	tlb_lock        %r20,%r21,%r22
+	pitlb           (%sr4,%r25)
+	tlb_unlock      %r20,%r21,%r22
+#endif
+
 	bv		%r0(%r2)
-	pitlb		(%sr4,%r25)
+	nop
 	.exit
 
 	.procend
@@ -777,7 +1022,7 @@ ENTRY(flush_kernel_dcache_page_asm)
 	.procend
 ENDPROC(flush_kernel_dcache_page_asm)
 
-ENTRY(purge_kernel_dcache_page)
+ENTRY(purge_kernel_dcache_page_asm)
 	.proc
 	.callinfo NO_CALLS
 	.entry
@@ -817,7 +1062,7 @@ ENTRY(purge_kernel_dcache_page)
 	.exit
 
 	.procend
-ENDPROC(purge_kernel_dcache_page)
+ENDPROC(purge_kernel_dcache_page_asm)
 
 ENTRY(flush_user_dcache_range_asm)
 	.proc

From 6d2439d9558e259822fb487ec274cc9e362e6a81 Mon Sep 17 00:00:00 2001
From: John David Anglin <dave.anglin@bell.net>
Date: Sun, 3 Feb 2013 23:01:47 +0000
Subject: [PATCH 11/31] parisc: fixes and cleanups in page cache flushing (3/4)

flush_cache_mm, for the non current case also uses flush_dcache_page_asm
and flush_icache_page_asm which are TMPALIAS flushes.

For the non current case, the algorithm used by get_ptep is derived from the
vmalloc_to_page implementation in vmalloc.c.  It is essentially a generic page
table lookup.  The other alternative was to duplicate the lookup in entry.S.
The break point for switching to a full cache flush is somewhat arbitrary.  The
same approach is used in flush_cache_range for non current case.  In a GCC
build and check, many small programs are executed and this change provided a
significant performance enhancement, e.g. GCC build time was cut almost in half
on a rp3440 at j4.  Previously, we always flushed the entire cache.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/kernel/cache.c | 88 +++++++++++++++++++++++++++++++++++---
 1 file changed, 81 insertions(+), 7 deletions(-)

diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
index d9cbb4b22c9f..ec63de95cbd9 100644
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -469,8 +469,66 @@ void flush_cache_all(void)
 	on_each_cpu(cacheflush_h_tmp_function, NULL, 1);
 }
 
+static inline unsigned long mm_total_size(struct mm_struct *mm)
+{
+	struct vm_area_struct *vma;
+	unsigned long usize = 0;
+
+	for (vma = mm->mmap; vma; vma = vma->vm_next)
+		usize += vma->vm_end - vma->vm_start;
+	return usize;
+}
+
+static inline pte_t *get_ptep(pgd_t *pgd, unsigned long addr)
+{
+	pte_t *ptep = NULL;
+
+	if (!pgd_none(*pgd)) {
+		pud_t *pud = pud_offset(pgd, addr);
+		if (!pud_none(*pud)) {
+			pmd_t *pmd = pmd_offset(pud, addr);
+			if (!pmd_none(*pmd))
+				ptep = pte_offset_map(pmd, addr);
+		}
+	}
+	return ptep;
+}
+
 void flush_cache_mm(struct mm_struct *mm)
 {
+	/* Flushing the whole cache on each cpu takes forever on
+	   rp3440, etc.  So, avoid it if the mm isn't too big.  */
+	if (mm_total_size(mm) < parisc_cache_flush_threshold) {
+		struct vm_area_struct *vma;
+
+		if (mm->context == mfsp(3)) {
+			for (vma = mm->mmap; vma; vma = vma->vm_next) {
+				flush_user_dcache_range_asm(vma->vm_start,
+					vma->vm_end);
+				if (vma->vm_flags & VM_EXEC)
+					flush_user_icache_range_asm(
+					  vma->vm_start, vma->vm_end);
+			}
+		} else {
+			pgd_t *pgd = mm->pgd;
+
+			for (vma = mm->mmap; vma; vma = vma->vm_next) {
+				unsigned long addr;
+
+				for (addr = vma->vm_start; addr < vma->vm_end;
+				     addr += PAGE_SIZE) {
+					pte_t *ptep = get_ptep(pgd, addr);
+					if (ptep != NULL) {
+						pte_t pte = *ptep;
+						__flush_cache_page(vma, addr,
+						  page_to_phys(pte_page(pte)));
+					}
+				}
+			}
+		}
+		return;
+	}
+
 #ifdef CONFIG_SMP
 	flush_cache_all();
 #else
@@ -496,20 +554,36 @@ flush_user_icache_range(unsigned long start, unsigned long end)
 		flush_instruction_cache();
 }
 
-
 void flush_cache_range(struct vm_area_struct *vma,
 		unsigned long start, unsigned long end)
 {
-	int sr3;
-
 	BUG_ON(!vma->vm_mm->context);
 
-	sr3 = mfsp(3);
-	if (vma->vm_mm->context == sr3) {
-		flush_user_dcache_range(start,end);
-		flush_user_icache_range(start,end);
+	if ((end - start) < parisc_cache_flush_threshold) {
+		if (vma->vm_mm->context == mfsp(3)) {
+			flush_user_dcache_range_asm(start, end);
+			if (vma->vm_flags & VM_EXEC)
+				flush_user_icache_range_asm(start, end);
+		} else {
+			unsigned long addr;
+			pgd_t *pgd = vma->vm_mm->pgd;
+
+			for (addr = start & PAGE_MASK; addr < end;
+			     addr += PAGE_SIZE) {
+				pte_t *ptep = get_ptep(pgd, addr);
+				if (ptep != NULL) {
+					pte_t pte = *ptep;
+					flush_cache_page(vma,
+					   addr, pte_pfn(pte));
+				}
+			}
+		}
 	} else {
+#ifdef CONFIG_SMP
 		flush_cache_all();
+#else
+		flush_cache_all_local();
+#endif
 	}
 }
 

From cca8e9026041544c0103b3037d8f03c1d2f4ae02 Mon Sep 17 00:00:00 2001
From: John David Anglin <dave.anglin@bell.net>
Date: Sun, 3 Feb 2013 23:02:49 +0000
Subject: [PATCH 12/31] parisc: fixes and cleanups in page cache flushing (4/4)

CONFIG_PARISC_TMPALIAS enables clear_user_highpage and copy_user_highpage.
These are essentially alternative implementations of clear_user_page and
copy_user_page.  They don't have anything to do with x86 high pages, but they
build on the infrastructure to save a few instructions.  Read the comment in
clear_user_highpage as it is very important to the implementation.  For this
reason, there isn't any gain in using the TMPALIAS/highpage approach.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/kernel/cache.c | 64 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)

diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
index ec63de95cbd9..1c61b8245650 100644
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -596,3 +596,67 @@ flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long
 	__flush_cache_page(vma, vmaddr, page_to_phys(pfn_to_page(pfn)));
 
 }
+
+#ifdef CONFIG_PARISC_TMPALIAS
+
+void clear_user_highpage(struct page *page, unsigned long vaddr)
+{
+	void *vto;
+	unsigned long flags;
+
+	/* Clear using TMPALIAS region.  The page doesn't need to
+	   be flushed but the kernel mapping needs to be purged.  */
+
+	vto = kmap_atomic(page, KM_USER0);
+
+	/* The PA-RISC 2.0 Architecture book states on page F-6:
+	   "Before a write-capable translation is enabled, *all*
+	   non-equivalently-aliased translations must be removed
+	   from the page table and purged from the TLB.  (Note
+	   that the caches are not required to be flushed at this
+	   time.)  Before any non-equivalent aliased translation
+	   is re-enabled, the virtual address range for the writeable
+	   page (the entire page) must be flushed from the cache,
+	   and the write-capable translation removed from the page
+	   table and purged from the TLB."  */
+
+	purge_kernel_dcache_page_asm((unsigned long)vto);
+	purge_tlb_start(flags);
+	pdtlb_kernel(vto);
+	purge_tlb_end(flags);
+	preempt_disable();
+	clear_user_page_asm(vto, vaddr);
+	preempt_enable();
+
+	pagefault_enable();		/* kunmap_atomic(addr, KM_USER0); */
+}
+
+void copy_user_highpage(struct page *to, struct page *from,
+	unsigned long vaddr, struct vm_area_struct *vma)
+{
+	void *vfrom, *vto;
+	unsigned long flags;
+
+	/* Copy using TMPALIAS region.  This has the advantage
+	   that the `from' page doesn't need to be flushed.  However,
+	   the `to' page must be flushed in copy_user_page_asm since
+	   it can be used to bring in executable code.  */
+
+	vfrom = kmap_atomic(from, KM_USER0);
+	vto = kmap_atomic(to, KM_USER1);
+
+	purge_kernel_dcache_page_asm((unsigned long)vto);
+	purge_tlb_start(flags);
+	pdtlb_kernel(vto);
+	pdtlb_kernel(vfrom);
+	purge_tlb_end(flags);
+	preempt_disable();
+	copy_user_page_asm(vto, vfrom, vaddr);
+	flush_dcache_page_asm(__pa(vto), vaddr);
+	preempt_enable();
+
+	pagefault_enable();		/* kunmap_atomic(addr, KM_USER1); */
+	pagefault_enable();		/* kunmap_atomic(addr, KM_USER0); */
+}
+
+#endif /* CONFIG_PARISC_TMPALIAS */

From b54cb2332e387f29c65f19f3620e5c812c89a328 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Mon, 2 Mar 2009 10:45:53 +0100
Subject: [PATCH 13/31] parisc: remove IRQF_DISABLED

People are playing odd games with IRQF_DISABLED, remove it.

Its not reliable, since shared interrupt lines could disable it for you,
and its possible and allowed for archs to disable IRQs to limit IRQ nesting.

Therefore, simply mandate that _ALL_ IRQ handlers are run with IRQs disabled.

[ This _should_ not break anything, since we've mandated that IRQ handlers
  _must_ be able to deal with this for a _long_ time ]

IRQ handlers should be fast, no if buts and any other exceptions. We also have
plenty instrumentation to find any offending IRQ latency sources.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/include/asm/floppy.h | 4 ++--
 arch/parisc/kernel/irq.c         | 4 ++--
 drivers/parisc/superio.c         | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/parisc/include/asm/floppy.h b/arch/parisc/include/asm/floppy.h
index 4ca69f558fae..f84ff12574b7 100644
--- a/arch/parisc/include/asm/floppy.h
+++ b/arch/parisc/include/asm/floppy.h
@@ -157,10 +157,10 @@ static int fd_request_irq(void)
 {
 	if(can_use_virtual_dma)
 		return request_irq(FLOPPY_IRQ, floppy_hardint,
-				   IRQF_DISABLED, "floppy", NULL);
+				   0, "floppy", NULL);
 	else
 		return request_irq(FLOPPY_IRQ, floppy_interrupt,
-				   IRQF_DISABLED, "floppy", NULL);
+				   0, "floppy", NULL);
 }
 
 static unsigned long dma_mem_alloc(unsigned long size)
diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index 0299d63cd112..8094d3ed3b64 100644
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -379,14 +379,14 @@ void do_cpu_irq_mask(struct pt_regs *regs)
 static struct irqaction timer_action = {
 	.handler = timer_interrupt,
 	.name = "timer",
-	.flags = IRQF_DISABLED | IRQF_TIMER | IRQF_PERCPU | IRQF_IRQPOLL,
+	.flags = IRQF_TIMER | IRQF_PERCPU | IRQF_IRQPOLL,
 };
 
 #ifdef CONFIG_SMP
 static struct irqaction ipi_action = {
 	.handler = ipi_interrupt,
 	.name = "IPI",
-	.flags = IRQF_DISABLED | IRQF_PERCPU,
+	.flags = IRQF_PERCPU,
 };
 #endif
 
diff --git a/drivers/parisc/superio.c b/drivers/parisc/superio.c
index 5003458980d3..ac6e8e7a02df 100644
--- a/drivers/parisc/superio.c
+++ b/drivers/parisc/superio.c
@@ -274,7 +274,7 @@ superio_init(struct pci_dev *pcidev)
 	else
 		printk(KERN_ERR PFX "USB regulator not initialized!\n");
 
-	if (request_irq(pdev->irq, superio_interrupt, IRQF_DISABLED,
+	if (request_irq(pdev->irq, superio_interrupt, 0,
 			SUPERIO, (void *)sio)) {
 
 		printk(KERN_ERR PFX "could not get irq\n");

From 027f27c4eca00b4411fb1fe61c33060569ff73f6 Mon Sep 17 00:00:00 2001
From: John David Anglin <dave.anglin@bell.net>
Date: Sat, 2 Feb 2013 23:41:24 +0000
Subject: [PATCH 14/31] parisc: disable preemption while flushing D- or
 I-caches through TMPALIAS region

It is necessary to disable preemption during cache flushes done through the
TMPALIAS region to ensure that the TLB setup is not clobbered by another flush.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/include/asm/cacheflush.h | 2 ++
 arch/parisc/kernel/cache.c           | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/arch/parisc/include/asm/cacheflush.h b/arch/parisc/include/asm/cacheflush.h
index 9f21ab0c02e3..79f694f3ad9b 100644
--- a/arch/parisc/include/asm/cacheflush.h
+++ b/arch/parisc/include/asm/cacheflush.h
@@ -115,7 +115,9 @@ flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vma
 {
 	if (PageAnon(page)) {
 		flush_tlb_page(vma, vmaddr);
+		preempt_disable();
 		flush_dcache_page_asm(page_to_phys(page), vmaddr);
+		preempt_enable();
 	}
 }
 
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
index 1c61b8245650..4b12890642eb 100644
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -267,9 +267,11 @@ static inline void
 __flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr,
 		   unsigned long physaddr)
 {
+	preempt_disable();
 	flush_dcache_page_asm(physaddr, vmaddr);
 	if (vma->vm_flags & VM_EXEC)
 		flush_icache_page_asm(physaddr, vmaddr);
+	preempt_enable();
 }
 
 void flush_dcache_page(struct page *page)

From 5ca8b91df88fa417aa7aac19494a8ae1602db2cb Mon Sep 17 00:00:00 2001
From: John David Anglin <dave.anglin@bell.net>
Date: Sat, 2 Feb 2013 23:44:59 +0000
Subject: [PATCH 15/31] parisc: ensure that mmapped shared pages are aligned at
 SHMLBA addresses

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/kernel/sys_parisc.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/arch/parisc/kernel/sys_parisc.c b/arch/parisc/kernel/sys_parisc.c
index f76c10863c62..a047b3227e50 100644
--- a/arch/parisc/kernel/sys_parisc.c
+++ b/arch/parisc/kernel/sys_parisc.c
@@ -94,11 +94,12 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
 {
 	if (len > TASK_SIZE)
 		return -ENOMEM;
-	/* Might want to check for cache aliasing issues for MAP_FIXED case
-	 * like ARM or MIPS ??? --BenH.
-	 */
-	if (flags & MAP_FIXED)
+	if (flags & MAP_FIXED) {
+		if ((flags & MAP_SHARED) &&
+		    (addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1))
+			return -EINVAL;
 		return addr;
+	}
 	if (!addr)
 		addr = TASK_UNMAPPED_BASE;
 

From 872420b3b869d47b1f1dd93418c34e306d962668 Mon Sep 17 00:00:00 2001
From: John David Anglin <dave.anglin@bell.net>
Date: Sat, 2 Feb 2013 23:42:25 +0000
Subject: [PATCH 16/31] parisc: always detect multiple physical ranges

This patch unbreaks the current logic in that way, that even if
CONFIG_DISCONTIGMEM isn't set, the user may be informed, that he should turn on
CONFIG_DISCONTIGMEM for his machine.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/include/asm/mmzone.h | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/parisc/include/asm/mmzone.h b/arch/parisc/include/asm/mmzone.h
index e67eb9c3d1bf..31835b998a5a 100644
--- a/arch/parisc/include/asm/mmzone.h
+++ b/arch/parisc/include/asm/mmzone.h
@@ -1,9 +1,10 @@
 #ifndef _PARISC_MMZONE_H
 #define _PARISC_MMZONE_H
 
+#define MAX_PHYSMEM_RANGES 8 /* Fix the size for now (current known max is 3) */
+
 #ifdef CONFIG_DISCONTIGMEM
 
-#define MAX_PHYSMEM_RANGES 8 /* Fix the size for now (current known max is 3) */
 extern int npmem_ranges;
 
 struct node_map_data {
@@ -60,7 +61,5 @@ static inline int pfn_valid(int pfn)
 	return 0;
 }
 
-#else /* !CONFIG_DISCONTIGMEM */
-#define MAX_PHYSMEM_RANGES 	1 
 #endif
 #endif /* _PARISC_MMZONE_H */

From 52ab532ea76d30b7e7a7b98021e2e873e83029a5 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@ZenIV.linux.org.uk>
Date: Sun, 9 Dec 2012 06:16:14 +0000
Subject: [PATCH 17/31] parisc: fix ptrace breakage

1) PTRACE_SYSCALL doesn't work for 64bit process on parisc64.
Compat syscall table is used instead of 64bit one.  IMO we should either
refuse to allow PTRACE_SYSCALL for 64bit processes or duplicate the
logics choosing the right syscall table into .Ltracesys.

	2) if you have let the tracee run with PTRACE_SYSCALL and
it had stopped, you can use PTRACE_POKEUSR to modify syscall number
(r20) and arguments 1--4 (r26--r23).  Modifications will have effect.
However, modifying arguments 5 and 6 (r22 and r21 resp.) works only
when process (32bit one) runs on 64bit host - on 32bit one it has no
effect.  AFAICS, the diff below should fix that one.

Signed-off-by: Al Viro <viro@ZenIV.linux.org.uk>
Tested-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/kernel/syscall.S | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/parisc/kernel/syscall.S b/arch/parisc/kernel/syscall.S
index 86742df0b194..5e055240f00b 100644
--- a/arch/parisc/kernel/syscall.S
+++ b/arch/parisc/kernel/syscall.S
@@ -309,10 +309,13 @@ tracesys_next:
 	LDREG   TASK_PT_GR25(%r1), %r25
 	LDREG   TASK_PT_GR24(%r1), %r24
 	LDREG   TASK_PT_GR23(%r1), %r23
-#ifdef CONFIG_64BIT
 	LDREG   TASK_PT_GR22(%r1), %r22
 	LDREG   TASK_PT_GR21(%r1), %r21
+#ifdef CONFIG_64BIT
 	ldo	-16(%r30),%r29			/* Reference param save area */
+#else
+	stw     %r22, -52(%r30)                 /* 5th argument */
+	stw     %r21, -56(%r30)                 /* 6th argument */
 #endif
 
 	comiclr,>>=	__NR_Linux_syscalls, %r20, %r0

From 45b6eff2a60c8bec1254412dfdb36acb0afe04a2 Mon Sep 17 00:00:00 2001
From: John David Anglin <dave.anglin@bell.net>
Date: Sat, 2 Feb 2013 23:43:06 +0000
Subject: [PATCH 18/31] parisc: space register variables need to be in native
 length (unsigned long)

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/kernel/signal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/parisc/kernel/signal.c b/arch/parisc/kernel/signal.c
index fd051705a407..52c85b2f502e 100644
--- a/arch/parisc/kernel/signal.c
+++ b/arch/parisc/kernel/signal.c
@@ -312,7 +312,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 #if DEBUG_SIG
 	/* Assert that we're flushing in the correct space... */
 	{
-		int sid;
+		unsigned long sid;
 		asm ("mfsp %%sr3,%0" : "=r" (sid));
 		DBG(1,"setup_rt_frame: Flushing 64 bytes at space %#x offset %p\n",
 		       sid, frame->tramp);

From 38057477b98712bd9c735bf9d26b83c25d9d3279 Mon Sep 17 00:00:00 2001
From: Kautuk Consul <consul.kautuk@gmail.com>
Date: Tue, 20 Mar 2012 09:26:53 -0400
Subject: [PATCH 19/31] parisc/mm/fault.c: Port OOM changes to do_page_fault

Commit d065bd810b6deb67d4897a14bfe21f8eb526ba99
(mm: retry page fault when blocking on disk transfer) and
commit 37b23e0525d393d48a7d59f870b3bc061a30ccdb
(x86,mm: make pagefault killable)

The above commits introduced changes into the x86 pagefault handler
for making the page fault handler retryable as well as killable.

These changes reduce the mmap_sem hold time, which is crucial
during OOM killer invocation.

Port these changes to parisc.

Signed-off-by: Kautuk Consul <consul.kautuk@gmail.com>
Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/mm/fault.c | 30 +++++++++++++++++++++++++-----
 1 file changed, 25 insertions(+), 5 deletions(-)

diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c
index 18162ce4261e..f247a3480e8e 100644
--- a/arch/parisc/mm/fault.c
+++ b/arch/parisc/mm/fault.c
@@ -175,10 +175,12 @@ void do_page_fault(struct pt_regs *regs, unsigned long code,
 	struct mm_struct *mm = tsk->mm;
 	unsigned long acc_type;
 	int fault;
+	unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
 
 	if (in_atomic() || !mm)
 		goto no_context;
 
+retry:
 	down_read(&mm->mmap_sem);
 	vma = find_vma_prev(mm, address, &prev_vma);
 	if (!vma || address < vma->vm_start)
@@ -201,7 +203,12 @@ void do_page_fault(struct pt_regs *regs, unsigned long code,
 	 * fault.
 	 */
 
-	fault = handle_mm_fault(mm, vma, address, (acc_type & VM_WRITE) ? FAULT_FLAG_WRITE : 0);
+	fault = handle_mm_fault(mm, vma, address,
+			flags | ((acc_type & VM_WRITE) ? FAULT_FLAG_WRITE : 0));
+
+	if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current))
+		return;
+
 	if (unlikely(fault & VM_FAULT_ERROR)) {
 		/*
 		 * We hit a shared mapping outside of the file, or some
@@ -214,10 +221,23 @@ void do_page_fault(struct pt_regs *regs, unsigned long code,
 			goto bad_area;
 		BUG();
 	}
-	if (fault & VM_FAULT_MAJOR)
-		current->maj_flt++;
-	else
-		current->min_flt++;
+	if (flags & FAULT_FLAG_ALLOW_RETRY) {
+		if (fault & VM_FAULT_MAJOR)
+			current->maj_flt++;
+		else
+			current->min_flt++;
+		if (fault & VM_FAULT_RETRY) {
+			flags &= ~FAULT_FLAG_ALLOW_RETRY;
+
+			/*
+			 * No need to up_read(&mm->mmap_sem) as we would
+			 * have already released it in __lock_page_or_retry
+			 * in mm/filemap.c.
+			 */
+
+			goto retry;
+		}
+	}
 	up_read(&mm->mmap_sem);
 	return;
 

From d313d4e72df38c1f6f7af9a0c4a101fd94541244 Mon Sep 17 00:00:00 2001
From: Paul Bolle <pebolle@tiscali.nl>
Date: Sat, 9 Jun 2012 23:04:01 +0200
Subject: [PATCH 20/31] parisc: remove unused compat_rt_sigframe.h header

Nothing uses compat_rt_sigframe.h anymore. Commit
f671c45df23005692daa200aba768c642fb14ef2 ("[PARISC] Arch-specific compat
signals") removed all includes of that header. It also basically copied
that entire header verbatim into signal32.h. It seems it was just
forgotten to also remove compat_rt_sigframe.h from the tree. Remove that
header now.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/include/asm/compat_rt_sigframe.h | 50 --------------------
 1 file changed, 50 deletions(-)
 delete mode 100644 arch/parisc/include/asm/compat_rt_sigframe.h

diff --git a/arch/parisc/include/asm/compat_rt_sigframe.h b/arch/parisc/include/asm/compat_rt_sigframe.h
deleted file mode 100644
index b3f95a7f18b4..000000000000
--- a/arch/parisc/include/asm/compat_rt_sigframe.h
+++ /dev/null
@@ -1,50 +0,0 @@
-#include <linux/compat.h>
-#include <linux/compat_siginfo.h>
-#include <asm/compat_ucontext.h>
-
-#ifndef _ASM_PARISC_COMPAT_RT_SIGFRAME_H
-#define _ASM_PARISC_COMPAT_RT_SIGFRAME_H
-
-/* In a deft move of uber-hackery, we decide to carry the top half of all
- * 64-bit registers in a non-portable, non-ABI, hidden structure.
- * Userspace can read the hidden structure if it *wants* but is never
- * guaranteed to be in the same place. Infact the uc_sigmask from the 
- * ucontext_t structure may push the hidden register file downards
- */
-struct compat_regfile {
-	/* Upper half of all the 64-bit registers that were truncated
-	   on a copy to a 32-bit userspace */
-	compat_int_t rf_gr[32];
-	compat_int_t rf_iasq[2];
-	compat_int_t rf_iaoq[2];
-	compat_int_t rf_sar;
-};
-
-#define COMPAT_SIGRETURN_TRAMP 4
-#define COMPAT_SIGRESTARTBLOCK_TRAMP 5 
-#define COMPAT_TRAMP_SIZE (COMPAT_SIGRETURN_TRAMP + COMPAT_SIGRESTARTBLOCK_TRAMP)
-
-struct compat_rt_sigframe {
-	/* XXX: Must match trampoline size in arch/parisc/kernel/signal.c 
-	        Secondary to that it must protect the ERESTART_RESTARTBLOCK
-		trampoline we left on the stack (we were bad and didn't 
-		change sp so we could run really fast.) */
-	compat_uint_t tramp[COMPAT_TRAMP_SIZE];
-	compat_siginfo_t info;
-	struct compat_ucontext uc;
-	/* Hidden location of truncated registers, *must* be last. */
-	struct compat_regfile regs; 
-};
-
-/*
- * The 32-bit ABI wants at least 48 bytes for a function call frame:
- * 16 bytes for arg0-arg3, and 32 bytes for magic (the only part of
- * which Linux/parisc uses is sp-20 for the saved return pointer...)
- * Then, the stack pointer must be rounded to a cache line (64 bytes).
- */
-#define SIGFRAME32		64
-#define FUNCTIONCALLFRAME32	48
-#define PARISC_RT_SIGFRAME_SIZE32					\
-	(((sizeof(struct compat_rt_sigframe) + FUNCTIONCALLFRAME32) + SIGFRAME32) & -SIGFRAME32)
-
-#endif

From 95bb2f0b40de9074af740ca6569c26813fde307d Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Thu, 7 Feb 2013 23:35:16 +0100
Subject: [PATCH 21/31] parisc: led driver requires CONFIG_VM_EVENT_COUNTERS

LED activity is calculated out of the vm event counters wich are delivered
through the all_vm_events() function which requires CONFIG_VM_EVENT_COUNTERS.

Signed-off-by: Helge Deller <deller@gmx.de>
---
 drivers/parisc/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/parisc/Kconfig b/drivers/parisc/Kconfig
index 620264936341..592de566e72f 100644
--- a/drivers/parisc/Kconfig
+++ b/drivers/parisc/Kconfig
@@ -128,6 +128,7 @@ config SUPERIO
 config CHASSIS_LCD_LED
 	bool "Chassis LCD and LED support"
 	default y
+	select VM_EVENT_COUNTERS
 	help
 	  Say Y here if you want to enable support for the Heartbeat,
 	  Disk/Network activities LEDs on some PA-RISC machines,

From 24084747df3474bbdeb0880d26afe82c42161a6b Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Fri, 8 Feb 2013 20:08:25 +0000
Subject: [PATCH 22/31] parisc: wire up process_vm_readv, process_vm_writev,
 kcmp and finit_module syscalls

Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/include/uapi/asm/unistd.h | 6 +++++-
 arch/parisc/kernel/syscall_table.S    | 4 ++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/arch/parisc/include/uapi/asm/unistd.h b/arch/parisc/include/uapi/asm/unistd.h
index e178f30f2ccc..2c8b9bde18eb 100644
--- a/arch/parisc/include/uapi/asm/unistd.h
+++ b/arch/parisc/include/uapi/asm/unistd.h
@@ -822,8 +822,12 @@
 #define __NR_syncfs		(__NR_Linux + 327)
 #define __NR_setns		(__NR_Linux + 328)
 #define __NR_sendmmsg		(__NR_Linux + 329)
+#define __NR_process_vm_readv	(__NR_Linux + 330)
+#define __NR_process_vm_writev	(__NR_Linux + 331)
+#define __NR_kcmp		(__NR_Linux + 332)
+#define __NR_finit_module	(__NR_Linux + 333)
 
-#define __NR_Linux_syscalls	(__NR_sendmmsg + 1)
+#define __NR_Linux_syscalls	(__NR_finit_module + 1)
 
 
 #define __IGNORE_select		/* newselect */
diff --git a/arch/parisc/kernel/syscall_table.S b/arch/parisc/kernel/syscall_table.S
index 54d950b067b7..cf7094c239f8 100644
--- a/arch/parisc/kernel/syscall_table.S
+++ b/arch/parisc/kernel/syscall_table.S
@@ -428,6 +428,10 @@
 	ENTRY_SAME(syncfs)
 	ENTRY_SAME(setns)
 	ENTRY_COMP(sendmmsg)
+	ENTRY_COMP(process_vm_readv)	/* 330 */
+	ENTRY_COMP(process_vm_writev)
+	ENTRY_SAME(kcmp)
+	ENTRY_SAME(finit_module)
 
 	/* Nothing yet */
 

From 330cb32520239a6ce81010df24c1e2d4ba67e7b5 Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Sat, 9 Feb 2013 23:11:46 +0000
Subject: [PATCH 23/31] parisc: fix personality on 32bit kernel

Process personality is stored together with other flags like UNAME26 in
an integer variable.  Overwriting this value with PER_LINUX drops all
other existing flags and as such broke tools like the uname26 tool.

Actually this was only broken on 32bit kernels, since for 32bit-ELF
binaries on 64-bit kernels the SET_PERSONALITY macro from
arch/parisc/kernel/binfmt_elf32.c is used which does not modifies the
personality value at all (which is wrong as long as we don't run HPUX
binaries or similiar).

Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/include/asm/elf.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/parisc/include/asm/elf.h b/arch/parisc/include/asm/elf.h
index 19f6cb1a4a1c..ad2b50397894 100644
--- a/arch/parisc/include/asm/elf.h
+++ b/arch/parisc/include/asm/elf.h
@@ -247,7 +247,7 @@ typedef unsigned long elf_greg_t;
 #define ELF_PLATFORM  ("PARISC\0")
 
 #define SET_PERSONALITY(ex) \
-	current->personality = PER_LINUX; \
+	set_personality((current->personality & ~PER_MASK) | PER_LINUX); \
 	current->thread.map_base = DEFAULT_MAP_BASE; \
 	current->thread.task_size = DEFAULT_TASK_SIZE \
 

From fee707b459da56ba83fbb4ae89151571502ee724 Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Mon, 11 Feb 2013 21:39:51 +0100
Subject: [PATCH 24/31] parisc: correctly wire up mq_* functions for
 CONFIG_COMPAT case

Fix mq_open, mq_timedsend, mq_timedreceive, mq_notify and mq_getsetattr
syscalls when running 32bit applications on 64bit kernel.

Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/kernel/syscall_table.S | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/parisc/kernel/syscall_table.S b/arch/parisc/kernel/syscall_table.S
index cf7094c239f8..e5fcd4c605e2 100644
--- a/arch/parisc/kernel/syscall_table.S
+++ b/arch/parisc/kernel/syscall_table.S
@@ -327,12 +327,12 @@
 	ENTRY_SAME(epoll_wait)
  	ENTRY_SAME(remap_file_pages)
 	ENTRY_SAME(semtimedop)
-	ENTRY_SAME(mq_open)
+	ENTRY_COMP(mq_open)
 	ENTRY_SAME(mq_unlink)		/* 230 */
-	ENTRY_SAME(mq_timedsend)
-	ENTRY_SAME(mq_timedreceive)
-	ENTRY_SAME(mq_notify)
-	ENTRY_SAME(mq_getsetattr)
+	ENTRY_COMP(mq_timedsend)
+	ENTRY_COMP(mq_timedreceive)
+	ENTRY_COMP(mq_notify)
+	ENTRY_COMP(mq_getsetattr)
 	ENTRY_COMP(waitid)		/* 235 */
 	ENTRY_OURS(fadvise64_64)
 	ENTRY_SAME(set_tid_address)

From bf581e15a443fa3569d9def96b512315ba509d6f Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Tue, 19 Feb 2013 20:47:37 +0100
Subject: [PATCH 25/31] parisc: convert msgrcv and msgsnd syscalls to use
 compat layer

Switch over to use the existing compat_* implementation for msgrcv() and
msgsnd().  Existing code was even partly buggy since it returned on some paths
different error codes than the standard.

Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/Kconfig                |  4 ++
 arch/parisc/include/asm/compat.h   | 61 ++++++++++++++++++++++++++++++
 arch/parisc/kernel/sys_parisc32.c  | 58 ----------------------------
 arch/parisc/kernel/syscall_table.S |  4 +-
 4 files changed, 67 insertions(+), 60 deletions(-)

diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 3df1c35a217a..af48d26ce287 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -272,6 +272,10 @@ config COMPAT
 	def_bool y
 	depends on 64BIT
 
+config SYSVIPC_COMPAT
+	def_bool y
+	depends on COMPAT && SYSVIPC
+
 config HPUX
 	bool "Support for HP-UX binaries"
 	depends on !64BIT
diff --git a/arch/parisc/include/asm/compat.h b/arch/parisc/include/asm/compat.h
index db7a662691a8..94710cfc1ce8 100644
--- a/arch/parisc/include/asm/compat.h
+++ b/arch/parisc/include/asm/compat.h
@@ -28,6 +28,7 @@ typedef u16	compat_nlink_t;
 typedef u16	compat_ipc_pid_t;
 typedef s32	compat_daddr_t;
 typedef u32	compat_caddr_t;
+typedef s32	compat_key_t;
 typedef s32	compat_timer_t;
 
 typedef s32	compat_int_t;
@@ -188,6 +189,66 @@ typedef struct compat_siginfo {
 #define COMPAT_OFF_T_MAX	0x7fffffff
 #define COMPAT_LOFF_T_MAX	0x7fffffffffffffffL
 
+struct compat_ipc64_perm {
+	compat_key_t key;
+	__compat_uid_t uid;
+	__compat_gid_t gid;
+	__compat_uid_t cuid;
+	__compat_gid_t cgid;
+	unsigned short int __pad1;
+	compat_mode_t mode;
+	unsigned short int __pad2;
+	unsigned short int seq;
+	unsigned int __pad3;
+	unsigned long __unused1;	/* yes they really are 64bit pads */
+	unsigned long __unused2;
+};
+
+struct compat_semid64_ds {
+	struct compat_ipc64_perm sem_perm;
+	compat_time_t sem_otime;
+	unsigned int __unused1;
+	compat_time_t sem_ctime;
+	unsigned int __unused2;
+	compat_ulong_t sem_nsems;
+	compat_ulong_t __unused3;
+	compat_ulong_t __unused4;
+};
+
+struct compat_msqid64_ds {
+	struct compat_ipc64_perm msg_perm;
+	unsigned int __unused1;
+	compat_time_t msg_stime;
+	unsigned int __unused2;
+	compat_time_t msg_rtime;
+	unsigned int __unused3;
+	compat_time_t msg_ctime;
+	compat_ulong_t msg_cbytes;
+	compat_ulong_t msg_qnum;
+	compat_ulong_t msg_qbytes;
+	compat_pid_t msg_lspid;
+	compat_pid_t msg_lrpid;
+	compat_ulong_t __unused4;
+	compat_ulong_t __unused5;
+};
+
+struct compat_shmid64_ds {
+	struct compat_ipc64_perm shm_perm;
+	unsigned int __unused1;
+	compat_time_t shm_atime;
+	unsigned int __unused2;
+	compat_time_t shm_dtime;
+	unsigned int __unused3;
+	compat_time_t shm_ctime;
+	unsigned int __unused4;
+	compat_size_t shm_segsz;
+	compat_pid_t shm_cpid;
+	compat_pid_t shm_lpid;
+	compat_ulong_t shm_nattch;
+	compat_ulong_t __unused5;
+	compat_ulong_t __unused6;
+};
+
 /*
  * A pointer passed in from user mode. This should not
  * be used for syscall parameters, just declare them
diff --git a/arch/parisc/kernel/sys_parisc32.c b/arch/parisc/kernel/sys_parisc32.c
index 9cfdaa19ab63..cee60f77fc1f 100644
--- a/arch/parisc/kernel/sys_parisc32.c
+++ b/arch/parisc/kernel/sys_parisc32.c
@@ -21,7 +21,6 @@
 #include <linux/time.h>
 #include <linux/smp.h>
 #include <linux/sem.h>
-#include <linux/msg.h>
 #include <linux/shm.h>
 #include <linux/slab.h>
 #include <linux/uio.h>
@@ -73,63 +72,6 @@ asmlinkage long sys32_sched_rr_get_interval(pid_t pid,
 	return ret;
 }
 
-struct msgbuf32 {
-    int mtype;
-    char mtext[1];
-};
-
-asmlinkage long sys32_msgsnd(int msqid,
-				struct msgbuf32 __user *umsgp32,
-				size_t msgsz, int msgflg)
-{
-	struct msgbuf *mb;
-	struct msgbuf32 mb32;
-	int err;
-
-	if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL)
-		return -ENOMEM;
-
-	err = get_user(mb32.mtype, &umsgp32->mtype);
-	mb->mtype = mb32.mtype;
-	err |= copy_from_user(mb->mtext, &umsgp32->mtext, msgsz);
-
-	if (err)
-		err = -EFAULT;
-	else
-		KERNEL_SYSCALL(err, sys_msgsnd, msqid, (struct msgbuf __user *)mb, msgsz, msgflg);
-
-	kfree(mb);
-	return err;
-}
-
-asmlinkage long sys32_msgrcv(int msqid,
-				struct msgbuf32 __user *umsgp32,
-				size_t msgsz, long msgtyp, int msgflg)
-{
-	struct msgbuf *mb;
-	struct msgbuf32 mb32;
-	int err, len;
-
-	if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL)
-		return -ENOMEM;
-
-	KERNEL_SYSCALL(err, sys_msgrcv, msqid, (struct msgbuf __user *)mb, msgsz, msgtyp, msgflg);
-
-	if (err >= 0) {
-		len = err;
-		mb32.mtype = mb->mtype;
-		err = put_user(mb32.mtype, &umsgp32->mtype);
-		err |= copy_to_user(&umsgp32->mtext, mb->mtext, len);
-		if (err)
-			err = -EFAULT;
-		else
-			err = len;
-	}
-
-	kfree(mb);
-	return err;
-}
-
 asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count)
 {
         mm_segment_t old_fs = get_fs();
diff --git a/arch/parisc/kernel/syscall_table.S b/arch/parisc/kernel/syscall_table.S
index e5fcd4c605e2..773b4ee1e1d3 100644
--- a/arch/parisc/kernel/syscall_table.S
+++ b/arch/parisc/kernel/syscall_table.S
@@ -286,8 +286,8 @@
 	ENTRY_SAME(semop)		/* 185 */
 	ENTRY_SAME(semget)
 	ENTRY_DIFF(semctl)
-	ENTRY_DIFF(msgsnd)
-	ENTRY_DIFF(msgrcv)
+	ENTRY_COMP(msgsnd)
+	ENTRY_COMP(msgrcv)
 	ENTRY_SAME(msgget)		/* 190 */
 	ENTRY_SAME(msgctl)
 	ENTRY_SAME(shmat)

From 2e800dff4f16a6e47adcbea7188fc586bfa5c30b Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Tue, 19 Feb 2013 21:11:39 +0100
Subject: [PATCH 26/31] parisc: fix error return codes for rt_sigaction and
 rt_sigprocmask

Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/kernel/signal32.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/arch/parisc/kernel/signal32.c b/arch/parisc/kernel/signal32.c
index 5dede04f2f3e..2ddcabb616ce 100644
--- a/arch/parisc/kernel/signal32.c
+++ b/arch/parisc/kernel/signal32.c
@@ -65,7 +65,7 @@ put_sigset32(compat_sigset_t __user *up, sigset_t *set, size_t sz)
 {
 	compat_sigset_t s;
 
-	if (sz != sizeof *set)
+	if (sz != sizeof(compat_sigset_t))
 		return -EINVAL;
 	sigset_64to32(&s, set);
 
@@ -78,7 +78,7 @@ get_sigset32(compat_sigset_t __user *up, sigset_t *set, size_t sz)
 	compat_sigset_t s;
 	int r;
 
-	if (sz != sizeof *set)
+	if (sz != sizeof(compat_sigset_t))
 		return -EINVAL;
 
 	if ((r = copy_from_user(&s, up, sz)) == 0) {
@@ -94,8 +94,11 @@ int sys32_rt_sigprocmask(int how, compat_sigset_t __user *set, compat_sigset_t _
 	sigset_t old_set, new_set;
 	int ret;
 
-	if (set && get_sigset32(set, &new_set, sigsetsize))
-		return -EFAULT;
+	if (set) {
+		ret = get_sigset32(set, &new_set, sigsetsize);
+		if (ret)
+			return ret;
+	}
 	
 	KERNEL_SYSCALL(ret, sys_rt_sigprocmask, how, set ? (sigset_t __user *)&new_set : NULL,
 				 oset ? (sigset_t __user *)&old_set : NULL, sigsetsize);
@@ -128,6 +131,10 @@ sys32_rt_sigaction(int sig, const struct sigaction32 __user *act, struct sigacti
 	struct k_sigaction new_sa, old_sa;
 	int ret = -EINVAL;
 
+	/* XXX: Don't preclude handling different sized sigset_t's.  */
+	if (sigsetsize != sizeof(compat_sigset_t))
+		return -EINVAL;
+
 	if (act) {
 		if (copy_from_user(&new_sa32.sa, act, sizeof new_sa32.sa))
 			return -EFAULT;

From 4474a331cfccc5092b79e3839205aacf44f3a571 Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Tue, 19 Feb 2013 21:23:59 +0100
Subject: [PATCH 27/31] parisc: fix fallocate syscall

fallocate(off_t) gets redirected by glibc to fallocate64(loff_t)
where the 64bit loff_t values get splitted into two 32bit (hi/lo)
values. This patch fixes this syscall for the 32- and 64bit kernel.

Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/kernel/sys_parisc.c    | 7 +++++++
 arch/parisc/kernel/sys_parisc32.c  | 7 -------
 arch/parisc/kernel/syscall_table.S | 2 +-
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/arch/parisc/kernel/sys_parisc.c b/arch/parisc/kernel/sys_parisc.c
index a047b3227e50..54d619d4cac6 100644
--- a/arch/parisc/kernel/sys_parisc.c
+++ b/arch/parisc/kernel/sys_parisc.c
@@ -213,6 +213,13 @@ asmlinkage long parisc_sync_file_range(int fd,
 			(loff_t)hi_nbytes << 32 | lo_nbytes, flags);
 }
 
+asmlinkage long parisc_fallocate(int fd, int mode, u32 offhi, u32 offlo,
+				u32 lenhi, u32 lenlo)
+{
+        return sys_fallocate(fd, mode, ((u64)offhi << 32) | offlo,
+                             ((u64)lenhi << 32) | lenlo);
+}
+
 asmlinkage unsigned long sys_alloc_hugepages(int key, unsigned long addr, unsigned long len, int prot, int flag)
 {
 	return -ENOMEM;
diff --git a/arch/parisc/kernel/sys_parisc32.c b/arch/parisc/kernel/sys_parisc32.c
index cee60f77fc1f..986294425e86 100644
--- a/arch/parisc/kernel/sys_parisc32.c
+++ b/arch/parisc/kernel/sys_parisc32.c
@@ -142,13 +142,6 @@ long sys32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
 				  buf, len);
 }
 
-asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
-				u32 lenhi, u32 lenlo)
-{
-        return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
-                             ((loff_t)lenhi << 32) | lenlo);
-}
-
 asmlinkage long compat_sys_fanotify_mark(int fan_fd, int flags, u32 mask_hi,
 					 u32 mask_lo, int fd,
 					 const char __user *pathname)
diff --git a/arch/parisc/kernel/syscall_table.S b/arch/parisc/kernel/syscall_table.S
index 773b4ee1e1d3..2a5f82985aa8 100644
--- a/arch/parisc/kernel/syscall_table.S
+++ b/arch/parisc/kernel/syscall_table.S
@@ -403,7 +403,7 @@
 	ENTRY_COMP(signalfd)
 	ENTRY_SAME(ni_syscall)		/* was timerfd */
 	ENTRY_SAME(eventfd)
-	ENTRY_COMP(fallocate)		/* 305 */
+	ENTRY_OURS(fallocate)		/* 305 */
 	ENTRY_SAME(timerfd_create)
 	ENTRY_COMP(timerfd_settime)
 	ENTRY_COMP(timerfd_gettime)

From e27da28a565e2a4d82a2d1adc9e0ba4aadd61e97 Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Tue, 19 Feb 2013 21:42:45 +0100
Subject: [PATCH 28/31] parisc: switch to available
 compat_sched_rr_get_interval implementation

Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/include/asm/unistd.h   |  1 +
 arch/parisc/kernel/sys_parisc32.c  | 12 ------------
 arch/parisc/kernel/syscall_table.S |  5 +----
 3 files changed, 2 insertions(+), 16 deletions(-)

diff --git a/arch/parisc/include/asm/unistd.h b/arch/parisc/include/asm/unistd.h
index 3043194547cd..f2e390fe74cf 100644
--- a/arch/parisc/include/asm/unistd.h
+++ b/arch/parisc/include/asm/unistd.h
@@ -149,6 +149,7 @@ type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5)	\
 #define __ARCH_WANT_SYS_SIGNAL
 #define __ARCH_WANT_SYS_TIME
 #define __ARCH_WANT_COMPAT_SYS_TIME
+#define __ARCH_WANT_COMPAT_SYS_SCHED_RR_GET_INTERVAL
 #define __ARCH_WANT_SYS_UTIME
 #define __ARCH_WANT_SYS_WAITPID
 #define __ARCH_WANT_SYS_SOCKETCALL
diff --git a/arch/parisc/kernel/sys_parisc32.c b/arch/parisc/kernel/sys_parisc32.c
index 986294425e86..0115eac76c39 100644
--- a/arch/parisc/kernel/sys_parisc32.c
+++ b/arch/parisc/kernel/sys_parisc32.c
@@ -60,18 +60,6 @@ asmlinkage long sys32_unimplemented(int r26, int r25, int r24, int r23,
     return -ENOSYS;
 }
 
-asmlinkage long sys32_sched_rr_get_interval(pid_t pid,
-	struct compat_timespec __user *interval)
-{
-	struct timespec t;
-	int ret;
-
-	KERNEL_SYSCALL(ret, sys_sched_rr_get_interval, pid, (struct timespec __user *)&t);
-	if (put_compat_timespec(&t, interval))
-		return -EFAULT;
-	return ret;
-}
-
 asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count)
 {
         mm_segment_t old_fs = get_fs();
diff --git a/arch/parisc/kernel/syscall_table.S b/arch/parisc/kernel/syscall_table.S
index 2a5f82985aa8..9180719dad04 100644
--- a/arch/parisc/kernel/syscall_table.S
+++ b/arch/parisc/kernel/syscall_table.S
@@ -247,10 +247,7 @@
 	ENTRY_SAME(sched_yield)
 	ENTRY_SAME(sched_get_priority_max)
 	ENTRY_SAME(sched_get_priority_min)	/* 160 */
-	/* These 2 would've worked if someone had defined struct timespec
-	 * carefully, like timeval for example (which is about the same).
-	 * Unfortunately it contains a long :-( */
-	ENTRY_DIFF(sched_rr_get_interval)
+	ENTRY_COMP(sched_rr_get_interval)
 	ENTRY_COMP(nanosleep)
 	ENTRY_SAME(mremap)
 	ENTRY_SAME(setresuid)

From f03d70a7fc952a7fd01c678ad409c932a925637b Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Tue, 19 Feb 2013 22:55:17 +0100
Subject: [PATCH 29/31] parisc: sendfile and sendfile64 syscall cleanups

Utilize the existing compat_sys_sendfile function for 64bit kernel and add
wrappers for sendfile and sendfile64 to correctly handle the 32/64 bit sign
extension.

Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/include/asm/unistd.h   |  1 +
 arch/parisc/kernel/sys_parisc32.c  | 45 +++++++++---------------------
 arch/parisc/kernel/syscall_table.S |  2 +-
 3 files changed, 15 insertions(+), 33 deletions(-)

diff --git a/arch/parisc/include/asm/unistd.h b/arch/parisc/include/asm/unistd.h
index f2e390fe74cf..74f801ebbe77 100644
--- a/arch/parisc/include/asm/unistd.h
+++ b/arch/parisc/include/asm/unistd.h
@@ -167,6 +167,7 @@ type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5)	\
 #define __ARCH_WANT_SYS_FORK
 #define __ARCH_WANT_SYS_VFORK
 #define __ARCH_WANT_SYS_CLONE
+#define __ARCH_WANT_COMPAT_SYS_SENDFILE
 
 #endif /* __ASSEMBLY__ */
 
diff --git a/arch/parisc/kernel/sys_parisc32.c b/arch/parisc/kernel/sys_parisc32.c
index 0115eac76c39..eca69bb8ef5f 100644
--- a/arch/parisc/kernel/sys_parisc32.c
+++ b/arch/parisc/kernel/sys_parisc32.c
@@ -60,42 +60,23 @@ asmlinkage long sys32_unimplemented(int r26, int r25, int r24, int r23,
     return -ENOSYS;
 }
 
-asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count)
+/* Note: it is necessary to treat out_fd and in_fd as unsigned ints, with the
+ * corresponding cast to a signed int to insure that the proper conversion
+ * (sign extension) between the register representation of a signed int (msr in
+ * 32-bit mode) and the register representation of a signed int (msr in 64-bit
+ * mode) is performed.
+ */
+asmlinkage long sys32_sendfile(u32 out_fd, u32 in_fd,
+			       compat_off_t __user *offset, compat_size_t count)
 {
-        mm_segment_t old_fs = get_fs();
-        int ret;
-        off_t of;
-
-        if (offset && get_user(of, offset))
-                return -EFAULT;
-
-        set_fs(KERNEL_DS);
-        ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count);
-        set_fs(old_fs);
-
-        if (offset && put_user(of, offset))
-                return -EFAULT;
-
-        return ret;
+	return compat_sys_sendfile((int)out_fd, (int)in_fd, offset, count);
 }
 
-asmlinkage int sys32_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
+asmlinkage long sys32_sendfile64(u32 out_fd, u32 in_fd,
+				 compat_loff_t __user *offset, compat_size_t count)
 {
-	mm_segment_t old_fs = get_fs();
-	int ret;
-	loff_t lof;
-	
-	if (offset && get_user(lof, offset))
-		return -EFAULT;
-		
-	set_fs(KERNEL_DS);
-	ret = sys_sendfile64(out_fd, in_fd, offset ? (loff_t __user *)&lof : NULL, count);
-	set_fs(old_fs);
-	
-	if (offset && put_user(lof, offset))
-		return -EFAULT;
-		
-	return ret;
+	return sys_sendfile64((int)out_fd, (int)in_fd,
+				(loff_t __user *)offset, count);
 }
 
 
diff --git a/arch/parisc/kernel/syscall_table.S b/arch/parisc/kernel/syscall_table.S
index 9180719dad04..129fd472c471 100644
--- a/arch/parisc/kernel/syscall_table.S
+++ b/arch/parisc/kernel/syscall_table.S
@@ -304,7 +304,7 @@
 	ENTRY_SAME(gettid)
 	ENTRY_OURS(readahead)
 	ENTRY_SAME(tkill)
-	ENTRY_SAME(sendfile64)
+	ENTRY_DIFF(sendfile64)
 	ENTRY_COMP(futex)		/* 210 */
 	ENTRY_COMP(sched_setaffinity)
 	ENTRY_COMP(sched_getaffinity)

From dc5322e5ae6a4688a998153976b52564916ec976 Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Tue, 19 Feb 2013 23:04:02 +0100
Subject: [PATCH 30/31] parisc: remove empty lines and unnecessary #ifdef
 coding in include/asm/signal.h

Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/include/asm/signal.h | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/arch/parisc/include/asm/signal.h b/arch/parisc/include/asm/signal.h
index 0fdb3c835952..b1a7c4c4a53a 100644
--- a/arch/parisc/include/asm/signal.h
+++ b/arch/parisc/include/asm/signal.h
@@ -3,16 +3,12 @@
 
 #include <uapi/asm/signal.h>
 
-
 #define _NSIG		64
 /* bits-per-word, where word apparently means 'long' not 'int' */
 #define _NSIG_BPW	BITS_PER_LONG
 #define _NSIG_WORDS	(_NSIG / _NSIG_BPW)
 
 # ifndef __ASSEMBLY__
-#ifdef CONFIG_64BIT
-#else
-#endif
 
 /* Most things should be clean enough to redefine this at will, if care
    is taken to make libc match.  */

From 1dda59b4f3d03fa28d86f3ea235655f0f96aab3e Mon Sep 17 00:00:00 2001
From: Nikitas Angelinas <nikitasangelinas@gmail.com>
Date: Wed, 8 Sep 2010 21:11:13 +0000
Subject: [PATCH 31/31] arch/parisc/include/asm: use ARRAY_SIZE macro in
 mmzone.h

Signed-off-by: Nikitas Angelinas <nikitasangelinas@gmail.com>
Signed-off-by: Helge Deller <deller@gmx.de>
---
 arch/parisc/include/asm/mmzone.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/parisc/include/asm/mmzone.h b/arch/parisc/include/asm/mmzone.h
index 31835b998a5a..0e625ab9aaec 100644
--- a/arch/parisc/include/asm/mmzone.h
+++ b/arch/parisc/include/asm/mmzone.h
@@ -45,7 +45,7 @@ static inline int pfn_to_nid(unsigned long pfn)
 		return 0;
 
 	i = pfn >> PFNNID_SHIFT;
-	BUG_ON(i >= sizeof(pfnnid_map) / sizeof(pfnnid_map[0]));
+	BUG_ON(i >= ARRAY_SIZE(pfnnid_map));
 	r = pfnnid_map[i];
 	BUG_ON(r == 0xff);