[(RT RFC) PATCH v2 9/9] remove the extra call to try_to_take_lock

[Gregory Haskins]

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>
---

 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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