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Subject[tip:locking/core] locking/rwsem: Prevent unneeded warning during locking selftest
Commit-ID:  26536e7c242e2b0f73c25c46fc50d2525ebe400b
Gitweb: https://git.kernel.org/tip/26536e7c242e2b0f73c25c46fc50d2525ebe400b
Author: Waiman Long <longman@redhat.com>
AuthorDate: Sat, 13 Apr 2019 13:22:44 -0400
Committer: Ingo Molnar <mingo@kernel.org>
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@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>
---
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 ")) \
\
 
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