[PATCH] initialise pi_lock if CONFIG_RT_MUTEXES=N
Fixes a bogus lockdep warning which causes lockdep to disable itself.
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/kernel/fork.c b/kernel/fork.c
index d154cc7..6af959c 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -933,8 +933,8 @@
static inline void rt_mutex_init_task(struct task_struct *p)
{
-#ifdef CONFIG_RT_MUTEXES
spin_lock_init(&p->pi_lock);
+#ifdef CONFIG_RT_MUTEXES
plist_head_init(&p->pi_waiters, &p->pi_lock);
p->pi_blocked_on = NULL;
#endif