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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2006-03-12 22:36:06 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-03-12 22:36:06 +0000
commitcdaabbd74b15296acf09215355a7f3b07b92b83e (patch)
treeda2e2ce07a31eb10cb3649005479a9588ba22809 /arch/arm/kernel/ptrace.c
parent04916c0ef482335cb0ae575dbc5a1d97619840cd (diff)
[ARM] iwmmxt thread state alignment
This patch removes the reliance of iwmmxt on hand coded alignments. Since thread_info is always 8K aligned, specifying that fpstate is 8-byte aligned achieves the same effect without needing to resort to hand coded alignments. 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.c14
1 files changed, 4 insertions, 10 deletions
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index 7b6256bb590..bc9e2f8ae32 100644
--- a/arch/arm/kernel/ptrace.c
+++ b/arch/arm/kernel/ptrace.c
@@ -610,15 +610,12 @@ static int ptrace_setfpregs(struct task_struct *tsk, void __user *ufp)
static int ptrace_getwmmxregs(struct task_struct *tsk, void __user *ufp)
{
struct thread_info *thread = task_thread_info(tsk);
- void *ptr = &thread->fpstate;
if (!test_ti_thread_flag(thread, TIF_USING_IWMMXT))
return -ENODATA;
iwmmxt_task_disable(thread); /* force it to ram */
- /* The iWMMXt state is stored doubleword-aligned. */
- if (((long) ptr) & 4)
- ptr += 4;
- return copy_to_user(ufp, ptr, 0x98) ? -EFAULT : 0;
+ return copy_to_user(ufp, &thread->fpstate.iwmmxt, IWMMXT_SIZE)
+ ? -EFAULT : 0;
}
/*
@@ -627,15 +624,12 @@ static int ptrace_getwmmxregs(struct task_struct *tsk, void __user *ufp)
static int ptrace_setwmmxregs(struct task_struct *tsk, void __user *ufp)
{
struct thread_info *thread = task_thread_info(tsk);
- void *ptr = &thread->fpstate;
if (!test_ti_thread_flag(thread, TIF_USING_IWMMXT))
return -EACCES;
iwmmxt_task_release(thread); /* force a reload */
- /* The iWMMXt state is stored doubleword-aligned. */
- if (((long) ptr) & 4)
- ptr += 4;
- return copy_from_user(ptr, ufp, 0x98) ? -EFAULT : 0;
+ return copy_from_user(&thead->fpstate.iwmmxt, ufp, IWMMXT_SIZE)
+ ? -EFAULT : 0;
}
#endif