[PATCH 5/5] remove the extra call to try_to_take_lock

From: Gregory Haskins
Date: Tue May 20 2008 - 11:23:54 EST

From: Peter W. Morreale <pmorreale@xxxxxxxxxx>

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@xxxxxxxxxx>
Signed-off-by: Gregory Haskins <ghaskins@xxxxxxxxxx>

kernel/rtmutex.c | 6 ------
1 files changed, 0 insertions(+), 6 deletions(-)

diff --git a/kernel/rtmutex.c b/kernel/rtmutex.c
index ec1f7d4..1da7813 100644
--- a/kernel/rtmutex.c
+++ b/kernel/rtmutex.c
@@ -785,12 +785,6 @@ rt_spin_lock_slowlock(struct rt_mutex *lock)
spin_lock_irqsave(&lock->wait_lock, flags);

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


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