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authorWill Deacon <will.deacon@arm.com>2012-01-30 20:23:29 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2012-02-02 17:37:42 +0000
commit8130b9d7b9d858aa04ce67805e8951e3cb6e9b2f (patch)
tree0b66f2eb287b5412ef7c3d8034a64d9182fb7999 /arch
parent247f4993a5974e6759606c4d380748eecfd273ff (diff)
downloadlinux-8130b9d7b9d858aa04ce67805e8951e3cb6e9b2f.tar.bz2
ARM: 7308/1: vfp: flush thread hwstate before copying ptrace registers
If we are context switched whilst copying into a thread's vfp_hard_struct then the partial copy may be corrupted by the VFP context switching code (see "ARM: vfp: flush thread hwstate before restoring context from sigframe"). This patch updates the ptrace VFP set code so that the thread state is flushed before the copy, therefore disabling VFP and preventing corruption from occurring. Cc: stable <stable@vger.kernel.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/kernel/ptrace.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index d001be4e0ce1..e33870ff0ac0 100644
--- a/arch/arm/kernel/ptrace.c
+++ b/arch/arm/kernel/ptrace.c
@@ -726,8 +726,8 @@ static int vfp_set(struct task_struct *target,
if (ret)
return ret;
- thread->vfpstate.hard = new_vfp;
vfp_flush_hwstate(thread);
+ thread->vfpstate.hard = new_vfp;
return 0;
}