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Paul Mackerras 5388fb1025 [PATCH] powerpc: Avoid potential FP corruption with preempt and UP 
Heikki Lindholm pointed out that there was a potential race with the
lazy CPU state (FP, VR, EVR) stuff if preempt is enabled.  The race
is that in the process of restoring FP state on sigreturn, the task
gets preempted by a user task that wants to use the FPU.  It will take
an FP unavailable exception, which will write the current FPU state
to the thread_struct, overwriting the values which sigreturn has
stored.  Note that this can only happen on UP since we don't implement
lazy CPU state on SMP.

The fix is to flush the lazy CPU state before updating the
thread_struct.  To do this we re-use the flush_lazy_cpu_state()
function from process.c.

Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-12 20:09:29 +11:00
..
iseries [PATCH] powerpc: Remove ItLpRegSave area from the paca 2006-01-09 14:50:32 +11:00
8253pit.h
a.out.h
abs_addr.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
agp.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
asm-compat.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
atomic.h [PATCH] mutex subsystem, add atomic_xchg() to all arches 2006-01-09 15:59:17 -08:00
auxvec.h [PATCH] powerpc: Merge vdso's and add vdso support to 32 bits kernel 2005-11-11 22:25:39 +11:00
backlight.h
bitops.h [FLS64]: generic version 2006-01-03 13:11:06 -08:00
bootx.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
btext.h [PATCH] powerpc: Unify udbg (#2) 2006-01-09 14:49:54 +11:00
bug.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
bugs.h
byteorder.h
cache.h [PATCH] Kill L1_CACHE_SHIFT_MAX 2006-01-08 20:13:39 -08:00
cacheflush.h [PATCH] powerpc: Merge cacheflush.h and cache.h 2005-11-10 13:09:22 +11:00
checksum.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
compat.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
cputable.h [PATCH] ppc64: Fix oprofile when compiled as a module 2006-01-09 16:02:52 +11:00
cputime.h
current.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
dbdma.h
delay.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
div64.h
dma-mapping.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc-merge 2006-01-09 10:03:44 -08:00
dma.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
eeh.h [PATCH] powerpc: PCI Error Recovery: PPC64 core recovery routines 2006-01-10 15:28:32 +11:00
eeh_event.h [PATCH] powerpc: PCI Error Recovery: PPC64 core recovery routines 2006-01-10 15:28:32 +11:00
elf.h asm-powerpc: header included twice 2006-01-11 02:07:34 +01:00
emergency-restart.h
errno.h
fcntl.h
firmware.h [PATCH] powerpc: Create a trampoline for the fwnmi vectors 2006-01-09 14:52:17 +11:00
floppy.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
futex.h [PATCH] powerpc: Consolidate asm compatibility macros 2005-11-10 13:10:38 +11:00
grackle.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
hardirq.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
heathrow.h powerpc: Fix some #ifndef __KERNEL__ that should be #ifdef 2006-01-09 15:14:05 +11:00
hvcall.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
hvconsole.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
hvcserver.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
hw_irq.h ppc64: remove ppc_irq_dispatch_handler 2005-11-09 16:19:53 +11:00
i8259.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
ibmebus.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
ide.h powerpc: merge ide.h 2005-11-08 12:20:34 +11:00
io.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
ioctl.h
ioctls.h
iommu.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
ipc.h
ipcbuf.h [PATCH] powerpc: Keep fixing merged ipcbuf.h 2005-11-03 16:58:17 +11:00
ipic.h [PATCH] powerpc: moved ipic code to arch/powerpc 2006-01-09 14:48:57 +11:00
irq.h [PATCH] ppc32: fix PQ2 PCI DMA interrupt handling 2005-11-11 22:19:56 +11:00
kdebug.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
kdump.h [PATCH] powerpc: Reroute interrupts from 0 + offset to PHYSICAL_START + offset 2006-01-09 14:52:21 +11:00
kexec.h [PATCH] Kdump: powerpc and s390 build failure fix 2006-01-10 08:01:27 -08:00
keylargo.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
kmap_types.h
kprobes.h [PATCH] kprobes: fix build breakage 2006-01-10 08:01:40 -08:00
linkage.h
lmb.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
local.h
lppaca.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
machdep.h [PATCH] cell: enable pause(0) in cpu_idle 2006-01-09 15:44:32 +11:00
macio.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
mc146818rtc.h
mediabay.h
mman.h [PATCH] madvise(MADV_REMOVE): remove pages from tmpfs shm backing store 2006-01-06 08:33:22 -08:00
mmu.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
mmu_context.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
mmzone.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
module.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
mpic.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
msgbuf.h
mutex.h [PATCH] mutex subsystem, add default include/asm-*/mutex.h files 2006-01-09 15:59:19 -08:00
namei.h
numnodes.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
nvram.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
of_device.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
ohare.h powerpc: Fix some #ifndef __KERNEL__ that should be #ifdef 2006-01-09 15:14:05 +11:00
oprofile_impl.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
paca.h [PATCH] powerpc/64: per cpu data optimisations 2006-01-11 14:49:45 +11:00
page.h powerpc/32: Fix compile error caused by pud_t/pgt_t confusion 2006-01-11 16:27:21 +11:00
page_32.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
page_64.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
param.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
parport.h [PATCH] powerpc: parallel port init fix 2006-01-11 14:49:24 +11:00
pci-bridge.h [PATCH] powerpc: Save device BARs much earlier in the boot sequence 2006-01-10 15:30:39 +11:00
pci.h [PATCH] powerpc: make pcibios_claim_one_bus available to other code 2006-01-09 14:51:08 +11:00
percpu.h [PATCH] powerpc/64: per cpu data optimisations 2006-01-11 14:49:45 +11:00
pgalloc.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
pgtable-4k.h powerpc: Trivially merge several headers from asm-ppc64 to asm-powerpc 2005-11-19 20:17:32 +11:00
pgtable-64k.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
pgtable.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
pmac_feature.h [PATCH] 3/5 powerpc: Add platform functions interpreter 2006-01-09 15:47:18 +11:00
pmac_low_i2c.h [PATCH] 3/5 powerpc: Add platform functions interpreter 2006-01-09 15:47:18 +11:00
pmac_pfunc.h [PATCH] 3/5 powerpc: Add platform functions interpreter 2006-01-09 15:47:18 +11:00
pmc.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
poll.h
posix_types.h
ppc-pci.h [PATCH] powerpc: Save device BARs much earlier in the boot sequence 2006-01-10 15:30:39 +11:00
ppc_asm.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
processor.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
prom.h [PATCH] powerpc: Remove device_node addrs/n_addr 2006-01-09 14:53:55 +11:00
pSeries_reconfig.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
ptrace.h [PATCH] syscall entry/exit revamp 2006-01-09 14:49:01 +11:00
reg.h [PATCH] cell: enable pause(0) in cpu_idle 2006-01-09 15:44:32 +11:00
reg_8xx.h [PATCH] powerpc: Merge cacheflush.h and cache.h 2005-11-10 13:09:22 +11:00
resource.h
rtas.h [PATCH] powerpc: Make early debugging configurable via Kconfig 2006-01-11 14:48:26 +11:00
rtc.h
rwsem.h
scatterlist.h
seccomp.h powerpc: Fix some #ifndef __KERNEL__ that should be #ifdef 2006-01-09 15:14:05 +11:00
sections.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
semaphore.h
sembuf.h
serial.h powerpc: Introduce a new config symbol to control 16550 early debug code 2006-01-10 16:19:05 +11:00
setup.h
shmbuf.h
shmparam.h
sigcontext.h powerpc: merge sigcontext.h 2005-11-03 16:24:25 +11:00
siginfo.h
signal.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
smp.h powerpc: Various UP build fixes 2005-11-07 13:18:13 +11:00
smu.h spelling: s/retreive/retrieve/ 2006-01-10 00:10:13 +01:00
socket.h
sockios.h
sparsemem.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
spinlock.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
spinlock_types.h
spu.h [PATCH] spufs: set irq affinity for running threads 2006-01-09 15:44:57 +11:00
spu_csa.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
sstep.h
stat.h powerpc: merge stat.h 2005-11-03 16:02:23 +11:00
statfs.h
string.h
synch.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
system.h [PATCH] powerpc: Avoid potential FP corruption with preempt and UP 2006-01-12 20:09:29 +11:00
tce.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
termbits.h
termios.h
thread_info.h [PATCH] syscall entry/exit revamp 2006-01-09 14:49:01 +11:00
time.h
timex.h
tlb.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
tlbflush.h [PATCH] ppc64: support 64k pages 2005-11-06 16:56:47 -08:00
topology.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
types.h
uaccess.h [PATCH] powerpc: Consolidate asm compatibility macros 2005-11-10 13:10:38 +11:00
ucontext.h powerpc: merge ucontext.h 2005-11-03 16:59:17 +11:00
udbg.h [PATCH] powerpc: Make early debugging configurable via Kconfig 2006-01-11 14:48:26 +11:00
unaligned.h
uninorth.h
unistd.h powerpc: Update __NR_syscalls to account for SPU syscalls 2006-01-09 14:49:34 +11:00
user.h
vdso.h [PATCH] powerpc: Make the vDSO functions set error code (#2) 2005-11-16 14:05:11 +11:00
vdso_datapage.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
vga.h
vio.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
xmon.h powerpc: Simplify and clean up the xmon terminal I/O 2005-11-08 22:55:08 +11:00
xor.h