locking: Add __sched to semaphore functions

The internal functions are marked with __sched already, let's do the same
for external functions too so that we can skip them in the stack trace.

Signed-off-by: Namhyung Kim <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]

kernel/locking/semaphore.c

@@ -51,7 +51,7 @@ static noinline void __up(struct semaphore *sem);
  * Use of this function is deprecated, please use down_interruptible() or
  * down_killable() instead.
  */
-void down(struct semaphore *sem)
+void __sched down(struct semaphore *sem)
 {
 	unsigned long flags;
 
@@ -74,7 +74,7 @@ EXPORT_SYMBOL(down);
  * If the sleep is interrupted by a signal, this function will return -EINTR.
  * If the semaphore is successfully acquired, this function returns 0.
  */
-int down_interruptible(struct semaphore *sem)
+int __sched down_interruptible(struct semaphore *sem)
 {
 	unsigned long flags;
 	int result = 0;
@@ -101,7 +101,7 @@ EXPORT_SYMBOL(down_interruptible);
  * -EINTR.  If the semaphore is successfully acquired, this function returns
  * 0.
  */
-int down_killable(struct semaphore *sem)
+int __sched down_killable(struct semaphore *sem)
 {
 	unsigned long flags;
 	int result = 0;
@@ -131,7 +131,7 @@ EXPORT_SYMBOL(down_killable);
  * Unlike mutex_trylock, this function can be used from interrupt context,
  * and the semaphore can be released by any task or interrupt.
  */
-int down_trylock(struct semaphore *sem)
+int __sched down_trylock(struct semaphore *sem)
 {
 	unsigned long flags;
 	int count;
@@ -156,7 +156,7 @@ EXPORT_SYMBOL(down_trylock);
  * If the semaphore is not released within the specified number of jiffies,
  * this function returns -ETIME.  It returns 0 if the semaphore was acquired.
  */
-int down_timeout(struct semaphore *sem, long timeout)
+int __sched down_timeout(struct semaphore *sem, long timeout)
 {
 	unsigned long flags;
 	int result = 0;
@@ -180,7 +180,7 @@ EXPORT_SYMBOL(down_timeout);
  * Release the semaphore.  Unlike mutexes, up() may be called from any
  * context and even by tasks which have never called down().
  */
-void up(struct semaphore *sem)
+void __sched up(struct semaphore *sem)
 {
 	unsigned long flags;