semaphore: Add DEFINE_SEMAPHORE

The full cleanup of init_MUTEX[_LOCKED] and DECLARE_MUTEX has not been
done. Some of the users are real semaphores and we should name them as
such instead of confusing everyone with "MUTEX".

Provide the infrastructure to get finally rid of init_MUTEX[_LOCKED]
and DECLARE_MUTEX.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Christoph Hellwig <hch@infradead.org>
LKML-Reference: <20100907125054.795929962@linutronix.de>

diff --git a/include/linux/semaphore.h b/include/linux/semaphore.h
index 7415839ac890f538b88611f7843b5b770e73292f..5310d27abd2a503ad523059ea4832f34ecfbb194 100644 (file)
--- a/include/linux/semaphore.h
+++ b/include/linux/semaphore.h
@@ -26,6 +26,9 @@ struct semaphore {
        .wait_list      = LIST_HEAD_INIT((name).wait_list),             \
 }
 
+#define DEFINE_SEMAPHORE(name) \
+       struct semaphore name = __SEMAPHORE_INITIALIZER(name, 1)
+
 #define DECLARE_MUTEX(name)    \
        struct semaphore name = __SEMAPHORE_INITIALIZER(name, 1)