[PATCH] Fix spinlock owner debugging

fix up the runqueue lock owner only if we truly did a context-switch
with the runqueue lock held. Impacts ia64, mips, sparc64 and arm.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/kernel/sched.c b/kernel/sched.c
index 81b3a96ed2d0..1f31a528fdba 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -294,6 +294,10 @@ static inline void prepare_lock_switch(runqueue_t *rq, task_t *next)
 
 static inline void finish_lock_switch(runqueue_t *rq, task_t *prev)
 {
+#ifdef CONFIG_DEBUG_SPINLOCK
+        /* this is a valid case when another task releases the spinlock */
+        rq->lock.owner = current;
+#endif
         spin_unlock_irq(&rq->lock);
 }
 
@@ -1529,10 +1533,6 @@ static inline void finish_task_switch(runqueue_t *rq, task_t *prev)
          *              Manfred Spraul <manfred@colorfullife.com>
          */
         prev_task_flags = prev->flags;
-#ifdef CONFIG_DEBUG_SPINLOCK
-        /* this is a valid case when another task releases the spinlock */
-        rq->lock.owner = current;
-#endif
         finish_arch_switch(prev);
         finish_lock_switch(rq, prev);
         if (mm)