locking, semaphores: Annotate inner lock as raw

There is no reason to have the spin_lock protecting the semaphore
preemptible on -rt. Annotate it as a raw_spinlock.

In mainline this change documents the low level nature of
the lock - otherwise there's no functional difference. Lockdep
and Sparse checking will work as usual.

( On rt this also solves lockdep complaining about the
  rt_mutex.wait_lock being not initialized. )

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2 insertions, 2 deletions

diff --git a/include/linux/semaphore.h b/include/linux/semaphore.h
index 39fa04966aa8..dc368b8ce215 100644
--- a/include/linux/semaphore.h
+++ b/include/linux/semaphore.h
@@ -14,14 +14,14 @@
 
 /* Please don't access any members of this structure directly */
 struct semaphore {
-        spinlock_t              lock;
+        raw_spinlock_t          lock;
         unsigned int            count;
         struct list_head        wait_list;
 };
 
 #define __SEMAPHORE_INITIALIZER(name, n)                                \
 {                                                                       \
-        .lock           = __SPIN_LOCK_UNLOCKED((name).lock),            \
+        .lock           = __RAW_SPIN_LOCK_UNLOCKED((name).lock),        \
         .count          = n,                                            \
         .wait_list      = LIST_HEAD_INIT((name).wait_list),             \
 }