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locking/mutex: Fix mutex debug call and ww_mutex documentation 

The following commit:

  08295b3b5b ("Implement an algorithm choice for Wound-Wait mutexes")

introduced a reference in the documentation to a function that was
removed in an earlier commit.

It also forgot to remove a call to debug_mutex_add_waiter() which is now
unconditionally called by __mutex_add_waiter().

Fix those bugs.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: dri-devel@lists.freedesktop.org
Fixes: 08295b3b5b ("Implement an algorithm choice for Wound-Wait mutexes")
Link: http://lkml.kernel.org/r/20180903140708.2401-1-thellstrom@vmware.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Thomas Hellstrom 2018-09-03 16:07:08 +02:00 committed by Ingo Molnar
parent 11da3a7f84
commit e13e2366d8
1 changed files with 1 additions and 2 deletions
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3
kernel/locking/mutex.c
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@ -389,7 +389,7 @@ static bool __ww_mutex_wound(struct mutex *lock,
/*
* wake_up_process() paired with set_current_state()
* inserts sufficient barriers to make sure @owner either sees
* it's wounded in __ww_mutex_lock_check_stamp() or has a
* it's wounded in __ww_mutex_check_kill() or has a
* wakeup pending to re-read the wounded state.
*/
if (owner != current)
@ -946,7 +946,6 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass,
}
debug_mutex_lock_common(lock, &waiter);
debug_mutex_add_waiter(lock, &waiter, current);
lock_contended(&lock->dep_map, ip);