The following commit has been merged into the locking/urgent branch of tip:
Commit-ID: 453624fa68444c9b93addb4325c9db59b6a43e21
Gitweb: https://git.kernel.org/tip/453624fa68444c9b93addb4325c9db59b6a43e21
Author: Mike Galbraith <efault@xxxxxx>
AuthorDate: Tue, 31 Aug 2021 08:38:19 +02:00
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Tue, 31 Aug 2021 11:53:12 +02:00
locking/rwsem: Add missing __init_rwsem() for PREEMPT_RT
730633f0b7f95 became the first direct caller of __init_rwsem() vs the
usual init_rwsem(), exposing PREEMPT_RT's lack thereof. Add it.
[ tglx: Move it out of line ]
Signed-off-by: Mike Galbraith <efault@xxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/50a936b7d8f12277d6ec7ed2ef0421a381056909.camel@xxxxxx
---
include/linux/rwsem.h | 12 ++----------
kernel/locking/rwsem.c | 8 +++++---
2 files changed, 7 insertions(+), 13 deletions(-)
diff --git a/include/linux/rwsem.h b/include/linux/rwsem.h
index 426e98e..352c612 100644
--- a/include/linux/rwsem.h
+++ b/include/linux/rwsem.h
@@ -142,22 +142,14 @@ struct rw_semaphore {
#define DECLARE_RWSEM(lockname) \
struct rw_semaphore lockname = __RWSEM_INITIALIZER(lockname)
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
-extern void __rwsem_init(struct rw_semaphore *rwsem, const char *name,
+extern void __init_rwsem(struct rw_semaphore *rwsem, const char *name,
struct lock_class_key *key);
-#else
-static inline void __rwsem_init(struct rw_semaphore *rwsem, const char *name,
- struct lock_class_key *key)
-{
-}
-#endif
#define init_rwsem(sem) \
do { \
static struct lock_class_key __key; \
\
- init_rwbase_rt(&(sem)->rwbase); \
- __rwsem_init((sem), #sem, &__key); \
+ __init_rwsem((sem), #sem, &__key); \
} while (0)
static __always_inline int rwsem_is_locked(struct rw_semaphore *sem)
diff --git a/kernel/locking/rwsem.c b/kernel/locking/rwsem.c
index 9215b4d..f18bbe8 100644
--- a/kernel/locking/rwsem.c
+++ b/kernel/locking/rwsem.c
@@ -1376,15 +1376,17 @@ static inline void __downgrade_write(struct rw_semaphore *sem)
#include "rwbase_rt.c"
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
void __rwsem_init(struct rw_semaphore *sem, const char *name,
struct lock_class_key *key)
{
+ init_rwbase_rt(&(sem)->rwbase);
+
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
debug_check_no_locks_freed((void *)sem, sizeof(*sem));
lockdep_init_map_wait(&sem->dep_map, name, key, 0, LD_WAIT_SLEEP);
-}
-EXPORT_SYMBOL(__rwsem_init);
#endif
+}
+EXPORT_SYMBOL(__init_rwsem);
static inline void __down_read(struct rw_semaphore *sem)
{
|