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authorRussell King <rmk+kernel@arm.linux.org.uk>2010-02-06 11:36:23 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-02-15 21:39:53 +0000
commitad187f956108e1c56b444706212bf08d84c0bee0 (patch)
tree5aa54adb07016a87be9629aea20a6fd363d449c2 /arch/arm/kernel/ptrace.c
parent54cb3dbb4a1cccd6b1bffc169ff638f8e74daf44 (diff)
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/ptrace.c')
-rw-r--r--arch/arm/kernel/ptrace.c6
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