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Subject[(RT RFC) PATCH v2 9/9] remove the extra call to try_to_take_lock
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From: Peter W. Morreale <pmorreale@novell.com>

Remove the redundant attempt to get the lock. While it is true that the
exit path with this patch adds an un-necessary xchg (in the event the
lock is granted without further traversal in the loop) experimentation
shows that we almost never encounter this situation.

Signed-off-by: Peter W. Morreale <pmorreale@novell.com>
---
kernel/rtmutex.c | 6 ------
1 files changed, 0 insertions(+), 6 deletions(-)
diff --git a/kernel/rtmutex.c b/kernel/rtmutex.c
index b81bbef..266ae31 100644
--- a/kernel/rtmutex.c
+++ b/kernel/rtmutex.c
@@ -756,12 +756,6 @@ rt_spin_lock_slowlock(struct rt_mutex *lock)
spin_lock_irqsave(&lock->wait_lock, flags);
init_lists(lock);

- /* Try to acquire the lock again: */
- if (try_to_take_rt_mutex(lock)) {
- spin_unlock_irqrestore(&lock->wait_lock, flags);
- return;
- }
-
BUG_ON(rt_mutex_owner(lock) == current);

/*


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