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[PATCH] mm: consolidate get_order

Browse source 
Someone mentioned that almost all the architectures used basically the same
implementation of get_order.  This patch consolidates them into
asm-generic/page.h and includes that in the appropriate places.  The
exceptions are ia64 and ppc which have their own (presumably optimised)
versions.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Stephen Rothwell 2005-09-03 15:54:30 -07:00 committed by Linus Torvalds
parent 28ae55c98e
commit fd4fd5aac1
22 changed files with 69 additions and 312 deletions
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16
include/asm-alpha/page.h
View file

@ -63,20 +63,6 @@ typedef unsigned long pgprot_t;
#endif /* STRICT_MM_TYPECHECKS */
/* Pure 2^n version of get_order */
extern __inline__ int get_order(unsigned long size)
{
int order;
size = (size-1) >> (PAGE_SHIFT-1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
#ifdef USE_48_BIT_KSEG
#define PAGE_OFFSET 0xffff800000000000UL
#else
@ -112,4 +98,6 @@ extern __inline__ int get_order(unsigned long size)
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _ALPHA_PAGE_H */

16
include/asm-arm/page.h
View file

@ -163,20 +163,6 @@ typedef unsigned long pgprot_t;
/* the upper-most page table pointer */
extern pmd_t *top_pmd;
/* Pure 2^n version of get_order */
static inline int get_order(unsigned long size)
{
int order;
size = (size-1) >> (PAGE_SHIFT-1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
#include <asm/memory.h>
#endif /* !__ASSEMBLY__ */
@ -186,4 +172,6 @@ static inline int get_order(unsigned long size)
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif

16
include/asm-arm26/page.h
View file

@ -89,20 +89,6 @@ typedef unsigned long pgprot_t;
#ifdef __KERNEL__
#ifndef __ASSEMBLY__
/* Pure 2^n version of get_order */
static inline int get_order(unsigned long size)
{
int order;
size = (size-1) >> (PAGE_SHIFT-1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
#include <asm/memory.h>
#endif /* !__ASSEMBLY__ */
@ -112,4 +98,6 @@ static inline int get_order(unsigned long size)
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif

15
include/asm-cris/page.h
View file

@ -70,19 +70,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
#ifndef __ASSEMBLY__
/* Pure 2^n version of get_order */
static inline int get_order(unsigned long size)
{
int order;
size = (size-1) >> (PAGE_SHIFT-1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
#endif /* __ASSEMBLY__ */
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
@ -90,5 +77,7 @@ static inline int get_order(unsigned long size)
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _CRIS_PAGE_H */

17
include/asm-frv/page.h
View file

@ -45,21 +45,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK)
/* Pure 2^n version of get_order */
static inline int get_order(unsigned long size) __attribute_const__;
static inline int get_order(unsigned long size)
{
int order;
size = (size - 1) >> (PAGE_SHIFT - 1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
#define devmem_is_allowed(pfn) 1
#define __pa(vaddr) virt_to_phys((void *) vaddr)
@ -102,4 +87,6 @@ extern unsigned long max_pfn;
#define WANT_PAGE_VIRTUAL 1
#endif
#include <asm-generic/page.h>
#endif /* _ASM_PAGE_H */

26
include/asm-generic/page.h Normal file
View file

@ -0,0 +1,26 @@
#ifndef _ASM_GENERIC_PAGE_H
#define _ASM_GENERIC_PAGE_H
#ifdef __KERNEL__
#ifndef __ASSEMBLY__
#include <linux/compiler.h>
/* Pure 2^n version of get_order */
static __inline__ __attribute_const__ int get_order(unsigned long size)
{
int order;
size = (size - 1) >> (PAGE_SHIFT - 1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
#endif /* __ASSEMBLY__ */
#endif /* __KERNEL__ */
#endif /* _ASM_GENERIC_PAGE_H */

16
include/asm-h8300/page.h
View file

@ -54,20 +54,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
/* Pure 2^n version of get_order */
extern __inline__ int get_order(unsigned long size)
{
int order;
size = (size-1) >> (PAGE_SHIFT-1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
extern unsigned long memory_start;
extern unsigned long memory_end;
@ -101,4 +87,6 @@ extern unsigned long memory_end;
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _H8300_PAGE_H */

16
include/asm-i386/page.h
View file

@ -104,20 +104,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
*/
extern unsigned int __VMALLOC_RESERVE;
/* Pure 2^n version of get_order */
static __inline__ int get_order(unsigned long size)
{
int order;
size = (size-1) >> (PAGE_SHIFT-1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
extern int sysctl_legacy_va_layout;
extern int page_is_ram(unsigned long pagenr);
@ -156,4 +142,6 @@ extern int page_is_ram(unsigned long pagenr);
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _I386_PAGE_H */

21
include/asm-m32r/page.h
View file

@ -61,25 +61,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
/* This handles the memory map.. */
#ifndef __ASSEMBLY__
/* Pure 2^n version of get_order */
static __inline__ int get_order(unsigned long size)
{
int order;
size = (size - 1) >> (PAGE_SHIFT - 1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
#endif /* __ASSEMBLY__ */
#define __MEMORY_START CONFIG_MEMORY_START
#define __MEMORY_SIZE CONFIG_MEMORY_SIZE
@ -111,5 +92,7 @@ static __inline__ int get_order(unsigned long size)
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _ASM_M32R_PAGE_H */

16
include/asm-m68k/page.h
View file

@ -107,20 +107,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
/* Pure 2^n version of get_order */
static inline int get_order(unsigned long size)
{
int order;
size = (size-1) >> (PAGE_SHIFT-1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
#endif /* !__ASSEMBLY__ */
#include <asm/page_offset.h>
@ -192,4 +178,6 @@ static inline void *__va(unsigned long x)
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _M68K_PAGE_H */

16
include/asm-m68knommu/page.h
View file

@ -48,20 +48,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
/* Pure 2^n version of get_order */
extern __inline__ int get_order(unsigned long size)
{
int order;
size = (size-1) >> (PAGE_SHIFT-1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
extern unsigned long memory_start;
extern unsigned long memory_end;
@ -93,4 +79,6 @@ extern unsigned long memory_end;
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _M68KNOMMU_PAGE_H */

16
include/asm-mips/page.h
View file

@ -103,20 +103,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
#define __pgd(x) ((pgd_t) { (x) } )
#define __pgprot(x) ((pgprot_t) { (x) } )
/* Pure 2^n version of get_order */
static __inline__ int get_order(unsigned long size)
{
int order;
size = (size-1) >> (PAGE_SHIFT-1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
#endif /* !__ASSEMBLY__ */
/* to align the pointer to the (next) page boundary */
@ -148,4 +134,6 @@ static __inline__ int get_order(unsigned long size)
#define WANT_PAGE_VIRTUAL
#endif
#include <asm-generic/page.h>
#endif /* _ASM_PAGE_H */

16
include/asm-parisc/page.h
View file

@ -74,20 +74,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
#define __pgd(x) ((pgd_t) { (x) } )
#define __pgprot(x) ((pgprot_t) { (x) } )
/* Pure 2^n version of get_order */
extern __inline__ int get_order(unsigned long size)
{
int order;
size = (size-1) >> (PAGE_SHIFT-1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
typedef struct __physmem_range {
unsigned long start_pfn;
unsigned long pages; /* PAGE_SIZE pages */
@ -159,4 +145,6 @@ extern int npmem_ranges;
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _PARISC_PAGE_H */

17
include/asm-ppc64/page.h
View file

@ -172,20 +172,6 @@ typedef unsigned long pgprot_t;
#endif
/* Pure 2^n version of get_order */
static inline int get_order(unsigned long size)
{
int order;
size = (size-1) >> (PAGE_SHIFT-1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
extern int page_is_ram(unsigned long pfn);
@ -270,4 +256,7 @@ extern u64 ppc64_pft_size; /* Log 2 of page table size */
VM_STACK_DEFAULT_FLAGS32 : VM_STACK_DEFAULT_FLAGS64)
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _PPC64_PAGE_H */

16
include/asm-s390/page.h
View file

@ -111,20 +111,6 @@ static inline void copy_page(void *to, void *from)
#define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
/* Pure 2^n version of get_order */
extern __inline__ int get_order(unsigned long size)
{
int order;
size = (size-1) >> (PAGE_SHIFT-1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
/*
* These are used to make use of C type-checking..
*/
@ -207,4 +193,6 @@ page_get_storage_key(unsigned long addr)
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _S390_PAGE_H */

20
include/asm-sh/page.h
View file

@ -122,24 +122,8 @@ typedef struct { unsigned long pgprot; } pgprot_t;
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
#ifndef __ASSEMBLY__
/* Pure 2^n version of get_order */
static __inline__ int get_order(unsigned long size)
{
int order;
size = (size-1) >> (PAGE_SHIFT-1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
#endif
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* __ASM_SH_PAGE_H */

20
include/asm-sh64/page.h
View file

@ -115,24 +115,8 @@ typedef struct { unsigned long pgprot; } pgprot_t;
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
#ifndef __ASSEMBLY__
/* Pure 2^n version of get_order */
extern __inline__ int get_order(unsigned long size)
{
int order;
size = (size-1) >> (PAGE_SHIFT-1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
#endif
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* __ASM_SH64_PAGE_H */

16
include/asm-sparc/page.h
View file

@ -132,20 +132,6 @@ BTFIXUPDEF_SETHI(sparc_unmapped_base)
#define TASK_UNMAPPED_BASE BTFIXUP_SETHI(sparc_unmapped_base)
/* Pure 2^n version of get_order */
extern __inline__ int get_order(unsigned long size)
{
int order;
size = (size-1) >> (PAGE_SHIFT-1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
#else /* !(__ASSEMBLY__) */
#define __pgprot(x) (x)
@ -178,4 +164,6 @@ extern unsigned long pfn_base;
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _SPARC_PAGE_H */

16
include/asm-sparc64/page.h
View file

@ -150,20 +150,6 @@ struct sparc_phys_banks {
extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS];
/* Pure 2^n version of get_order */
static __inline__ int get_order(unsigned long size)
{
int order;
size = (size-1) >> (PAGE_SHIFT-1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
#endif /* !(__ASSEMBLY__) */
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
@ -171,4 +157,6 @@ static __inline__ int get_order(unsigned long size)
#endif /* !(__KERNEL__) */
#include <asm-generic/page.h>
#endif /* !(_SPARC64_PAGE_H) */

16
include/asm-um/page.h
View file

@ -116,24 +116,12 @@ extern void *to_virt(unsigned long phys);
#define pfn_valid(pfn) ((pfn) < max_mapnr)
#define virt_addr_valid(v) pfn_valid(phys_to_pfn(__pa(v)))
/* Pure 2^n version of get_order */
static __inline__ int get_order(unsigned long size)
{
int order;
size = (size-1) >> (PAGE_SHIFT-1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
extern struct page *arch_validate(struct page *page, int mask, int order);
#define HAVE_ARCH_VALIDATE
extern void arch_free_page(struct page *page, int order);
#define HAVE_ARCH_FREE_PAGE
#include <asm-generic/page.h>
#endif

21
include/asm-v850/page.h
View file

@ -98,25 +98,6 @@ typedef unsigned long pgprot_t;
#define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK)
#ifndef __ASSEMBLY__
/* Pure 2^n version of get_order */
extern __inline__ int get_order (unsigned long size)
{
int order;
size = (size-1) >> (PAGE_SHIFT-1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
#endif /* !__ASSEMBLY__ */
/* No current v850 processor has virtual memory. */
#define __virt_to_phys(addr) (addr)
#define __phys_to_virt(addr) (addr)
@ -144,4 +125,6 @@ extern __inline__ int get_order (unsigned long size)
#endif /* KERNEL */
#include <asm-generic/page.h>
#endif /* __V850_PAGE_H__ */

16
include/asm-x86_64/page.h
View file

@ -92,20 +92,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
#include <asm/bug.h>
/* Pure 2^n version of get_order */
extern __inline__ int get_order(unsigned long size)
{
int order;
size = (size-1) >> (PAGE_SHIFT-1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
#endif /* __ASSEMBLY__ */
#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
@ -141,4 +127,6 @@ extern __inline__ int get_order(unsigned long size)
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _X86_64_PAGE_H */