summaryrefslogtreecommitdiff
path: root/include/linux/rwsem.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/rwsem.h')
-rw-r--r--include/linux/rwsem.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/rwsem.h b/include/linux/rwsem.h
index 716807f0eb2d..035d3c57fc8a 100644
--- a/include/linux/rwsem.h
+++ b/include/linux/rwsem.h
@@ -14,7 +14,9 @@
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/atomic.h>
+#ifdef CONFIG_RWSEM_SPIN_ON_OWNER
#include <linux/osq_lock.h>
+#endif
struct rw_semaphore;
@@ -26,7 +28,7 @@ struct rw_semaphore {
long count;
struct list_head wait_list;
raw_spinlock_t wait_lock;
-#ifdef CONFIG_SMP
+#ifdef CONFIG_RWSEM_SPIN_ON_OWNER
struct optimistic_spin_queue osq; /* spinner MCS lock */
/*
* Write owner. Used as a speculative check to see
@@ -63,7 +65,7 @@ static inline int rwsem_is_locked(struct rw_semaphore *sem)
# define __RWSEM_DEP_MAP_INIT(lockname)
#endif
-#if defined(CONFIG_SMP) && !defined(CONFIG_RWSEM_GENERIC_SPINLOCK)
+#ifdef CONFIG_RWSEM_SPIN_ON_OWNER
#define __RWSEM_OPT_INIT(lockname) , .osq = OSQ_LOCK_UNLOCKED, .owner = NULL
#else
#define __RWSEM_OPT_INIT(lockname)