lockdep: Fix incorrect condition to print bug msgs for MAX_LOCKDEP_CHAIN_HLOCKS

Bug messages and stack dump for MAX_LOCKDEP_CHAIN_HLOCKS should only
be printed once.

Signed-off-by: Byungchul Park <byungchul.park@lge.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1484275324-28192-1-git-send-email-byungchul.park@lge.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index 7c38f8f3d97b7b172dcd61f04df382548cf7ac15..bf60725247565de57a63dc90f537b38d2c61396a 100644 (file)
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -2203,7 +2203,7 @@ static inline int lookup_chain_cache(struct task_struct *curr,
         * Important for check_no_collision().
         */
        if (unlikely(nr_chain_hlocks > MAX_LOCKDEP_CHAIN_HLOCKS)) {
-               if (debug_locks_off_graph_unlock())
+               if (!debug_locks_off_graph_unlock())
                        return 0;
 
                print_lockdep_off("BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!");