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| author | Will Deacon <will.deacon@arm.com> | 2012-01-30 20:23:29 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-02-02 17:37:42 +0000 |
| commit | 8130b9d7b9d858aa04ce67805e8951e3cb6e9b2f (patch) | |
| tree | 0b66f2eb287b5412ef7c3d8034a64d9182fb7999 | |
| parent | 247f4993a5974e6759606c4d380748eecfd273ff (diff) | |
| download | linux-3.10-8130b9d7b9d858aa04ce67805e8951e3cb6e9b2f.tar.gz linux-3.10-8130b9d7b9d858aa04ce67805e8951e3cb6e9b2f.tar.bz2 linux-3.10-8130b9d7b9d858aa04ce67805e8951e3cb6e9b2f.zip | |
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>
| -rw-r--r-- | arch/arm/kernel/ptrace.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c index d001be4e0ce..e33870ff0ac 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; } |