Commit-ID: e13e2366d8415e029fe96a62502955083e272cef
Gitweb: https://git.kernel.org/tip/e13e2366d8415e029fe96a62502955083e272cef
Author: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
AuthorDate: Mon, 3 Sep 2018 16:07:08 +0200
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Mon, 10 Sep 2018 10:05:10 +0200
locking/mutex: Fix mutex debug call and ww_mutex documentation
The following commit:
08295b3b5bee ("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@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Fixes: 08295b3b5bee ("Implement an algorithm choice for Wound-Wait mutexes")
Link: http://lkml.kernel.org/r/20180903140708.2401-1-thellstrom@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
kernel/locking/mutex.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/kernel/locking/mutex.c b/kernel/locking/mutex.c
index 1a81a1257b3f..3f8a35104285 100644
--- a/kernel/locking/mutex.c
+++ b/kernel/locking/mutex.c
@@ -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);
|