Merge branch 'master'

1 files changed, 12 insertions, 8 deletions

diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index ba298277becd..30494aab829a 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -86,12 +86,16 @@ EXPORT_SYMBOL(pm_power_off);
  */
 void default_idle(void)
 {
-        local_irq_disable();
-        if (!need_resched() && !hlt_counter) {
-                timer_dyn_reprogram();
-                arch_idle();
+        if (hlt_counter)
+                cpu_relax();
+        else {
+                local_irq_disable();
+                if (!need_resched()) {
+                        timer_dyn_reprogram();
+                        arch_idle();
+                }
+                local_irq_enable();
         }
-        local_irq_enable();
 }
 
 /*
@@ -116,13 +120,13 @@ void cpu_idle(void)
 
                 if (!idle)
                         idle = default_idle;
-                preempt_disable();
                 leds_event(led_idle_start);
                 while (!need_resched())
                         idle();
                 leds_event(led_idle_end);
-                preempt_enable();
+                preempt_enable_no_resched();
                 schedule();
+                preempt_disable();
         }
 }
 
@@ -355,7 +359,7 @@ copy_thread(int nr, unsigned long clone_flags, unsigned long stack_start,
         struct thread_info *thread = p->thread_info;
         struct pt_regs *childregs;
 
-        childregs = ((struct pt_regs *)((unsigned long)thread + THREAD_START_SP)) - 1;
+        childregs = (void *)thread + THREAD_START_SP - sizeof(*regs);
         *childregs = *regs;
         childregs->ARM_r0 = 0;
         childregs->ARM_sp = stack_start;