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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-04-25 10:00:43 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-04-27 09:35:42 +0200
commit599c8a408f875477624384edd60ce0c821ff7c8a (patch)
parentd6b11409047f4aa9b1fec4e665b5cd42fcf3bbdb (diff)
Revert "locking/lockdep: Add debug_locks check in __lock_downgrade()"
This reverts commit 4a195a0bc2e954b91085d5c82eb20c51835ee7b0 which was commit 71492580571467fb7177aade19c18ce7486267f5 upstream. Tetsuo rightly points out that the backport here is incorrect, as it touches the __lock_set_class function instead of the intended __lock_downgrade function. Reported-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp> Cc: Waiman Long <longman@redhat.com> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Will Deacon <will.deacon@arm.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Sasha Levin <sashal@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 files changed, 0 insertions, 3 deletions
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index e57be7031cb3..bf694c709b96 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -3650,9 +3650,6 @@ __lock_set_class(struct lockdep_map *lock, const char *name,
unsigned int depth;
int i;
- if (unlikely(!debug_locks))
- return 0;
depth = curr->lockdep_depth;
* This function is about (re)setting the class of a held lock,