[patch 6/7] rtmutex: remove useless schedule enforcement

[Thomas Gleixner <tglx@linutronix.de>]

[-- Attachment #1: rtmutex-remove-useless-schedule-enforcement.patch --]
[-- Type: text/plain, Size: 945 bytes --]

For !mtx the call to schedule() is forced even if the waiter is
already woken (waiter.task == NULL).

This makes no sense at all and is just waste.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 kernel/rtmutex.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: linux-2.6.24/kernel/rtmutex.c
===================================================================
--- linux-2.6.24.orig/kernel/rtmutex.c
+++ linux-2.6.24/kernel/rtmutex.c
@@ -1411,7 +1411,7 @@ rt_read_slowlock(struct rw_mutex *rwm, i
 
 		debug_rt_mutex_print_deadlock(&waiter);
 
-		if (!mtx || waiter.task)
+		if (waiter.task)
 			schedule_rt_mutex(mutex);
 
 		spin_lock_irqsave(&mutex->wait_lock, flags);
@@ -1557,7 +1557,7 @@ rt_write_slowlock(struct rw_mutex *rwm, 
 
 		debug_rt_mutex_print_deadlock(&waiter);
 
-		if (!mtx || waiter.task)
+		if (waiter.task)
 			schedule_rt_mutex(mutex);
 
 		spin_lock_irqsave(&mutex->wait_lock, flags);

--