linux-kernel - [GIT PULL] locking fix

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Date:   Sun, 28 Mar 2021 12:28:43 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: [GIT PULL] locking fix

Linus,

Please pull the latest locking/urgent git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git locking-urgent-2021-03-28

   # HEAD: 291da9d4a9eb3a1cb0610b7f4480f5b52b1825e7 locking/mutex: Fix non debug version of mutex_lock_io_nested()

Fix the non-debug mutex_lock_io_nested() method to map to mutex_lock_io() instead of mutex_lock().

Right now nothing uses this API explicitly, but this is an accident waiting to happen.

 Thanks,

	Ingo

------------------>
Thomas Gleixner (1):
      locking/mutex: Fix non debug version of mutex_lock_io_nested()


 include/linux/mutex.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/mutex.h b/include/linux/mutex.h
index 0cd631a19727..515cff77a4f4 100644
--- a/include/linux/mutex.h
+++ b/include/linux/mutex.h
@@ -185,7 +185,7 @@ extern void mutex_lock_io(struct mutex *lock);
 # define mutex_lock_interruptible_nested(lock, subclass) mutex_lock_interruptible(lock)
 # define mutex_lock_killable_nested(lock, subclass) mutex_lock_killable(lock)
 # define mutex_lock_nest_lock(lock, nest_lock) mutex_lock(lock)
-# define mutex_lock_io_nested(lock, subclass) mutex_lock(lock)
+# define mutex_lock_io_nested(lock, subclass) mutex_lock_io(lock)
 #endif
 
 /*