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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-02-06 11:36:23 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-02-15 21:39:53 +0000 |
| commit | ad187f956108e1c56b444706212bf08d84c0bee0 (patch) | |
| tree | 5aa54adb07016a87be9629aea20a6fd363d449c2 /arch/arm/kernel | |
| parent | 54cb3dbb4a1cccd6b1bffc169ff638f8e74daf44 (diff) | |
| download | linux-stable-ad187f956108e1c56b444706212bf08d84c0bee0.tar.gz linux-stable-ad187f956108e1c56b444706212bf08d84c0bee0.tar.bz2 linux-stable-ad187f956108e1c56b444706212bf08d84c0bee0.zip | |
ARM: vfp ptrace: no point flushing hw context for PTRACE_GETVFPREGS
If we're only reading the VFP context via the ptrace call, there's
no need to invalidate the hardware context - we only need to do that
on PTRACE_SETVFPREGS. This allows more efficient monitoring of a
traced task.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/kernel')
| -rw-r--r-- | arch/arm/kernel/ptrace.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c index bdf002bab6a5..08f899fb76a6 100644 --- a/arch/arm/kernel/ptrace.c +++ b/arch/arm/kernel/ptrace.c @@ -700,7 +700,7 @@ static int ptrace_getvfpregs(struct task_struct *tsk, void __user *data) union vfp_state *vfp = &thread->vfpstate; struct user_vfp __user *ufp = data; - vfp_sync_state(thread); + vfp_sync_hwstate(thread); /* copy the floating point registers */ if (copy_to_user(&ufp->fpregs, &vfp->hard.fpregs, @@ -723,7 +723,7 @@ static int ptrace_setvfpregs(struct task_struct *tsk, void __user *data) union vfp_state *vfp = &thread->vfpstate; struct user_vfp __user *ufp = data; - vfp_sync_state(thread); + vfp_sync_hwstate(thread); /* copy the floating point registers */ if (copy_from_user(&vfp->hard.fpregs, &ufp->fpregs, @@ -734,6 +734,8 @@ static int ptrace_setvfpregs(struct task_struct *tsk, void __user *data) if (get_user(vfp->hard.fpscr, &ufp->fpscr)) return -EFAULT; + vfp_flush_hwstate(thread); + return 0; } #endif |