Commit a3ea3d9b authored Aug 23, 2016 by Peter Zijlstra Committed by Ingo Molnar Oct 25, 2016

locking/mutex: Allow MUTEX_SPIN_ON_OWNER when DEBUG_MUTEXES

Now that mutex::count and mutex::owner are the same field, we can
allow SPIN_ON_OWNER while DEBUG_MUTEX.

Tested-by: Jason Low <jason.low2@hpe.com>
Signed-off-by: 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: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent 890658b7

kernel/Kconfig.locks

+1 −1

Original line number	Diff line number	Diff line
		@@ -225,7 +225,7 @@ config ARCH_SUPPORTS_ATOMIC_RMW

		config MUTEX_SPIN_ON_OWNER
		def_bool y
		depends on SMP && !DEBUG_MUTEXES && ARCH_SUPPORTS_ATOMIC_RMW
		depends on SMP && ARCH_SUPPORTS_ATOMIC_RMW

		config RWSEM_SPIN_ON_OWNER
		def_bool y