From 5db6c6fefb1ca0e81e3bd6dd8998bf51c453d823 Mon Sep 17 00:00:00 2001 From: Davidlohr Bueso Date: Fri, 11 Jul 2014 14:00:06 -0700 Subject: locking/rwsem: Add CONFIG_RWSEM_SPIN_ON_OWNER Just like with mutexes (CONFIG_MUTEX_SPIN_ON_OWNER), encapsulate the dependencies for rwsem optimistic spinning. No logical changes here as it continues to depend on both SMP and the XADD algorithm variant. Signed-off-by: Davidlohr Bueso Acked-by: Jason Low [ Also make it depend on ARCH_SUPPORTS_ATOMIC_RMW. ] Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/r/1405112406-13052-2-git-send-email-davidlohr@hp.com Cc: aswin@hp.com Cc: Chris Mason Cc: Davidlohr Bueso Cc: Josef Bacik Cc: Linus Torvalds Cc: Waiman Long Signed-off-by: Ingo Molnar Signed-off-by: Ingo Molnar --- kernel/Kconfig.locks | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'kernel/Kconfig.locks') diff --git a/kernel/Kconfig.locks b/kernel/Kconfig.locks index 81907941d921..76768ee812b2 100644 --- a/kernel/Kconfig.locks +++ b/kernel/Kconfig.locks @@ -227,6 +227,10 @@ config MUTEX_SPIN_ON_OWNER def_bool y depends on SMP && !DEBUG_MUTEXES && ARCH_SUPPORTS_ATOMIC_RMW +config RWSEM_SPIN_ON_OWNER + def_bool y + depends on SMP && RWSEM_XCHGADD_ALGORITHM && ARCH_SUPPORTS_ATOMIC_RMW + config ARCH_USE_QUEUE_RWLOCK bool -- cgit v1.2.3-58-ga151