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5388fb1025
linux/arch/powerpc/kernel
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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
..
vdso32 [PATCH] powerpc: Add some missing .gitignore's 2006-01-11 15:35:35 +11:00
vdso64 [PATCH] powerpc: Add some missing .gitignore's 2006-01-11 15:35:35 +11:00
align.c [PATCH] powerpc: merge align.c 2005-11-18 14:39:23 +11:00
asm-offsets.c [PATCH] powerpc: Remove some unneeded fields from the paca 2006-01-09 14:50:35 +11:00
binfmt_elf32.c ppc64: merge binfmt_elf32.c 2005-10-13 13:40:54 +10:00
btext.c [PATCH] powerpc: Remove device_node addrs/n_addr 2006-01-09 14:53:55 +11:00
cpu_setup_power4.S [PATCH] powerpc: Move various ppc64 files with no ppc32 equivalent to powerpc 2005-11-10 11:24:04 +11:00
cputable.c [PATCH] ppc64: POWER5+ oprofile support 2006-01-09 16:03:30 +11:00
crash_dump.c powerpc: Fix compile error when CONFIG_PROC_VMCORE is not defined 2006-01-11 15:30:07 +11:00
crash.c [PATCH] powerpc: fix for compile problem in kdump code when SMP disabled 2006-01-11 15:33:55 +11:00
dma_64.c [PATCH] powerpc: IBMEBUS bus support 2006-01-09 14:49:06 +11:00
entry_32.S [PATCH] Fix code that saves NVGPRS in 32-bit signal frame 2006-01-09 14:50:48 +11:00
entry_64.S [PATCH] powerpc: Separate usage of KERNELBASE and PAGE_OFFSET 2006-01-09 14:51:54 +11:00
firmware.c [PATCH] powerpc: Move various ppc64 files with no ppc32 equivalent to powerpc 2005-11-10 11:24:04 +11:00
fpu.S [PATCH] powerpc: Consolidate asm compatibility macros 2005-11-10 13:10:38 +11:00
head_4xx.S powerpc: Rename asm offset TRAP to _TRAP for 32-bit 2005-10-28 22:45:25 +10:00
head_8xx.S powerpc: Rename asm offset TRAP to _TRAP for 32-bit 2005-10-28 22:45:25 +10:00
head_32.S powerpc: set CONFIG_PPC_OF=y always for ARCH=powerpc 2006-01-09 20:17:01 +11:00
head_44x.S [PATCH] powerpc: replace use of _GLOBAL with .globl 2005-10-17 21:43:12 +10:00
head_64.S powerpc: unbreak iSeries compilation again 2006-01-09 21:32:42 +11:00
head_fsl_booke.S [PATCH] Update email address for Kumar 2005-11-13 18:14:10 -08:00
ibmebus.c [PATCH] powerpc: IBMEBUS bus support 2006-01-09 14:49:06 +11:00
idle_6xx.S powerpc: Use reg.h instead of processor.h when we just want reg names 2005-10-10 22:20:10 +10:00
idle_64.c powerpc: Move remaining .c files from arch/ppc64 to arch/powerpc 2005-11-18 15:43:34 +11:00
idle_power4.S [PATCH] powerpc: Fix use of LOADBASE in merge tree 2005-10-17 21:43:12 +10:00
init_task.c powerpc: make process.c suitable for both 32-bit and 64-bit 2005-10-10 22:29:05 +10:00
iomap.c powerpc: Move most remaining ppc64 files over to arch/powerpc 2005-11-14 17:30:17 +11:00
iommu.c powerpc: Move most remaining ppc64 files over to arch/powerpc 2005-11-14 17:30:17 +11:00
irq.c powerpc: reduce include in irq.c 2006-01-09 14:50:15 +11:00
kprobes.c [PATCH] kprobes: fix race in recovery of reentrant probe 2006-01-11 18:42:12 -08:00
legacy_serial.c [PATCH] powerpc: fixing compile issue with !CONFIG_PCI in legacy_serial.c 2006-01-09 15:44:30 +11:00
lparcfg.c powerpc: iSeries build fixes 2005-11-14 17:14:51 +11:00
lparmap.c [PATCH] powerpc: Fix iSeries bug in VMALLOCBASE/VMALLOC_START consolidation 2006-01-09 15:06:06 +11:00
machine_kexec_32.c [PATCH] powerpc: Merge kexec 2006-01-09 14:48:52 +11:00
machine_kexec_64.c [PATCH] powerpc: Add arch dependent basic infrastructure for Kdump. 2006-01-09 14:52:28 +11:00
machine_kexec.c [PATCH] powerpc: remove remaining crash_notes variable from machine_kexec.c 2006-01-11 14:48:02 +11:00
Makefile [PATCH] powerpc: Don't build crash.c for PPC32 2006-01-11 19:52:05 +11:00
misc_32.S [PATCH] powerpc: Merge kexec 2006-01-09 14:48:52 +11:00
misc_64.S ppc64: remove ppc_irq_dispatch_handler 2005-11-09 16:19:53 +11:00
module_64.c powerpc: Move most remaining ppc64 files over to arch/powerpc 2005-11-14 17:30:17 +11:00
nvram_64.c [PATCH] powerpc: fix large nvram access 2006-01-09 14:53:31 +11:00
of_device.c powerpc: apply recent changes to merged code 2005-10-31 13:57:01 +11:00
paca.c [PATCH] powerpc: Remove some unneeded fields from the paca 2006-01-09 14:50:35 +11:00
pci_64.c [PATCH] PCI Hotplug/powerpc: module build break 2006-01-11 14:47:30 +11:00
pci_direct_iommu.c powerpc: Move most remaining ppc64 files over to arch/powerpc 2005-11-14 17:30:17 +11:00
pci_dn.c powerpc: Move most remaining ppc64 files over to arch/powerpc 2005-11-14 17:30:17 +11:00
pci_iommu.c powerpc: Move most remaining ppc64 files over to arch/powerpc 2005-11-14 17:30:17 +11:00
pmc.c [PATCH] powerpc: G4+ oprofile support 2006-01-09 15:06:03 +11:00
ppc32.h powerpc: move include/asm-ppc64/ppc32.h to arch/powerpc/kernel 2005-11-03 16:03:28 +11:00
ppc_ksyms.c [PATCH] powerpc: Some ppc compile fixes... 2006-01-10 16:49:20 +11:00
proc_ppc64.c [PATCH] powerpc: Merge vdso's and add vdso support to 32 bits kernel 2005-11-11 22:25:39 +11:00
process.c [PATCH] powerpc: Avoid potential FP corruption with preempt and UP 2006-01-12 20:09:29 +11:00
prom_init.c [PATCH] powerpc: Remove device_node addrs/n_addr 2006-01-09 14:53:55 +11:00
prom_parse.c [PATCH] powerpc: pci_address_to_pio fix 2006-01-09 15:05:56 +11:00
prom.c spelling: s/retreive/retrieve/ 2006-01-10 00:10:13 +01:00
ptrace32.c [PATCH] use ptrace_get_task_struct in various places 2006-01-08 20:13:51 -08:00
ptrace-common.h powerpc: move include/asm-ppc64/ptrace-common.h to arch/powerpc/kernel 2005-11-19 20:47:22 +11:00
ptrace.c powerpc: move include/asm-ppc64/ptrace-common.h to arch/powerpc/kernel 2005-11-19 20:47:22 +11:00
rtas_flash.c powerpc: Merge remaining RTAS code 2005-11-03 14:41:19 +11:00
rtas_pci.c [PATCH] powerpc: Save device BARs much earlier in the boot sequence 2006-01-10 15:30:39 +11:00
rtas-proc.c [PATCH] powerpc: Merge vdso's and add vdso support to 32 bits kernel 2005-11-11 22:25:39 +11:00
rtas-rtc.c powerpc: time-of-day fixes for 32-bit CHRP systems 2005-11-18 15:52:38 +11:00
rtas.c [PATCH] capable/capability.h (arch/) 2006-01-11 18:42:14 -08:00
semaphore.c powerpc: Merge enough to start building in arch/powerpc. 2005-09-26 16:04:21 +10:00
setup_32.c powerpc: Introduce a new config symbol to control 16550 early debug code 2006-01-10 16:19:05 +11:00
setup_64.c [PATCH] powerpc/64: per cpu data optimisations 2006-01-11 14:49:45 +11:00
setup-common.c [PATCH] powerpc: Add a is_kernel_addr() macro 2006-01-09 14:51:50 +11:00
setup.h powerpc: create kernel/setup.h 2005-11-09 11:35:26 +11:00
signal_32.c [PATCH] powerpc: Avoid potential FP corruption with preempt and UP 2006-01-12 20:09:29 +11:00
signal_64.c [PATCH] powerpc: Avoid potential FP corruption with preempt and UP 2006-01-12 20:09:29 +11:00
smp-tbsync.c powerpc: Merge smp-tbsync.c (the generic timebase sync routine) 2005-11-04 13:28:58 +11:00
smp.c [PATCH] ppc64: Add NUMA cpu summary at boot 2006-01-09 14:53:37 +11:00
sys_ppc32.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc-merge 2006-01-10 08:28:32 -08:00
syscalls.c [PATCH] ppc64: fix time syscall 2006-01-09 15:47:13 +11:00
sysfs.c [PATCH] powerpc: Merge vdso's and add vdso support to 32 bits kernel 2005-11-11 22:25:39 +11:00
systbl.S Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc-merge 2006-01-10 08:28:32 -08:00
time.c [PATCH] powerpc: Remove some unneeded fields from the paca 2006-01-09 14:50:35 +11:00
traps.c [PATCH] cell: enable pause(0) in cpu_idle 2006-01-09 15:44:32 +11:00
udbg_16550.c [PATCH] powerpc: Make early debugging configurable via Kconfig 2006-01-11 14:48:26 +11:00
udbg.c [PATCH] powerpc: Make early debugging configurable via Kconfig 2006-01-11 14:48:26 +11:00
vdso.c mm: re-architect the VM_UNPAGED logic 2005-11-28 14:34:23 -08:00
vecemu.c
vector.S powerpc: Use reg.h instead of processor.h when we just want reg names 2005-10-10 22:20:10 +10:00
vio.c [PATCH] driver core: replace "hotplug" by "uevent" 2006-01-04 16:18:08 -08:00
vmlinux.lds.S powerpc: Fix vmlinux.lds.S for 32-bit 2005-11-05 10:36:59 +11:00