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@redhat.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: huang ying <huang.ying.caritas@gmail.com>
Link: http://lkml.kernel.org/r/20190413172259.2740-2-longman@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/kernel/locking/rwsem.h b/kernel/locking/rwsem.h
index 37db178..64877f5 100644 (file)
--- 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 "))   \