[tip:locking/core] locking/rwsem: Prevent unneeded warning during locking selftest

[tip-bot for Waiman Long]

Commit-ID:  26536e7c242e2b0f73c25c46fc50d2525ebe400b
Gitweb:     https://git.kernel.org/tip/26536e7c242e2b0f73c25c46fc50d2525ebe400b
Author:     Waiman Long <longman@xxxxxxxxxx>
AuthorDate: Sat, 13 Apr 2019 13:22:44 -0400
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Sun, 14 Apr 2019 11:09:35 +0200

locking/rwsem: Prevent unneeded warning during locking selftest

Disable the DEBUG_RWSEMS check when locking selftest is running with
debug_locks_silent flag set.

Signed-off-by: Waiman Long <longman@xxxxxxxxxx>
Cc: Davidlohr Bueso <dave@xxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Cc: huang ying <huang.ying.caritas@xxxxxxxxx>
Link: http://lkml.kernel.org/r/20190413172259.2740-2-longman@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 kernel/locking/rwsem.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/locking/rwsem.h b/kernel/locking/rwsem.h
index 37db17890e36..64877f5294e3 100644
--- a/kernel/locking/rwsem.h
+++ b/kernel/locking/rwsem.h
@@ -30,7 +30,8 @@
 
 #ifdef CONFIG_DEBUG_RWSEMS
 # define DEBUG_RWSEMS_WARN_ON(c, sem)	do {			\
-	if (WARN_ONCE(c, "DEBUG_RWSEMS_WARN_ON(%s): count = 0x%lx, owner = 0x%lx, curr 0x%lx, list %sempty\n",\
+	if (!debug_locks_silent &&				\
+	    WARN_ONCE(c, "DEBUG_RWSEMS_WARN_ON(%s): count = 0x%lx, owner = 0x%lx, curr 0x%lx, list %sempty\n",\
 		#c, atomic_long_read(&(sem)->count),		\
 		(long)((sem)->owner), (long)current,		\
 		list_empty(&(sem)->wait_list) ? "" : "not "))	\