3 files changed, 13 insertions, 15 deletions

diff --git a/arch/arm/kernel/asm-offsets.c b/arch/arm/kernel/asm-offsets.c
index 0abbce8c70bc..b324dcac1c56 100644
--- a/arch/arm/kernel/asm-offsets.c
+++ b/arch/arm/kernel/asm-offsets.c
@@ -57,7 +57,9 @@ int main(void)
   DEFINE(TI_TP_VALUE,           offsetof(struct thread_info, tp_value));
   DEFINE(TI_FPSTATE,            offsetof(struct thread_info, fpstate));
   DEFINE(TI_VFPSTATE,           offsetof(struct thread_info, vfpstate));
-  DEFINE(TI_IWMMXT_STATE,       (offsetof(struct thread_info, fpstate)+4)&~7);
+#ifdef CONFIG_IWMMXT
+  DEFINE(TI_IWMMXT_STATE,       offsetof(struct thread_info, fpstate.iwmmxt));
+#endif
   BLANK();
   DEFINE(S_R0,                  offsetof(struct pt_regs, ARM_r0));
   DEFINE(S_R1,                  offsetof(struct pt_regs, ARM_r1));
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index 7b6256bb590e..bc9e2f8ae326 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
diff --git a/arch/arm/kernel/time.c b/arch/arm/kernel/time.c
index d7d932c02866..d6bd435a6857 100644
--- a/arch/arm/kernel/time.c
+++ b/arch/arm/kernel/time.c
@@ -422,12 +422,14 @@ static int timer_dyn_tick_disable(void)
 void timer_dyn_reprogram(void)
 {
         struct dyn_tick_timer *dyn_tick = system_timer->dyn_tick;
+        unsigned long next, seq;
 
-        if (dyn_tick) {
-                write_seqlock(&xtime_lock);
-                if (dyn_tick->state & DYN_TICK_ENABLED)
+        if (dyn_tick && (dyn_tick->state & DYN_TICK_ENABLED)) {
+                next = next_timer_interrupt();
+                do {
+                        seq = read_seqbegin(&xtime_lock);
                         dyn_tick->reprogram(next_timer_interrupt() - jiffies);
-                write_sequnlock(&xtime_lock);
+                } while (read_seqretry(&xtime_lock, seq));
         }
 }