Commit 6bc8996a authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Ingo Molnar
Browse files

locking/rtmutex: Provide rt_mutex_base_is_locked() 



Provide rt_mutex_base_is_locked(), which will be used for various wrapped
locking primitives for RT.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20210815211302.899572818@linutronix.de
parent ebbdc41e

include/linux/rtmutex.h

+12 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ 
#ifndef __LINUX_RT_MUTEX_H

#define __LINUX_RT_MUTEX_H



#include <linux/compiler.h>

#include <linux/linkage.h>

#include <linux/rbtree.h>

#include <linux/spinlock_types.h>
@@ -32,6 +33,17 @@ struct rt_mutex_base { 
	.owner = NULL							\

}



/**

 * rt_mutex_base_is_locked - is the rtmutex locked

 * @lock: the mutex to be queried

 *

 * Returns true if the mutex is locked, false if unlocked.

 */

static inline bool rt_mutex_base_is_locked(struct rt_mutex_base *lock)

{

	return READ_ONCE(lock->owner) != NULL;

}



extern void rt_mutex_base_init(struct rt_mutex_base *rtb);



/**