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| author | Doug Ledford <dledford@redhat.com> | 2015-09-25 10:46:07 -0400 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2015-09-25 10:46:07 -0400 |
| commit | 310b7cec8ea32dcd4e9978423717ce78dd89d45d (patch) | |
| tree | ed7de6ce3c25829d0e7de10d0db9b83c725ee327 /include/linux/percpu-rwsem.h | |
| parent | e116a64fab650aed3d7b9b4db0b59c07f361bc9f (diff) | |
| parent | 1f93e4a96c9109378204c147b3eec0d0e8100fde (diff) | |
Merge tag 'v4.3-rc2' into k.o/for-4.3-v1
Linux 4.3-rc2
Diffstat (limited to 'include/linux/percpu-rwsem.h')
| -rw-r--r-- | include/linux/percpu-rwsem.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/linux/percpu-rwsem.h b/include/linux/percpu-rwsem.h index 3e88c9a7d57f..834c4e52cb2d 100644 --- a/include/linux/percpu-rwsem.h +++ b/include/linux/percpu-rwsem.h @@ -16,6 +16,7 @@ struct percpu_rw_semaphore { }; extern void percpu_down_read(struct percpu_rw_semaphore *); +extern int percpu_down_read_trylock(struct percpu_rw_semaphore *); extern void percpu_up_read(struct percpu_rw_semaphore *); extern void percpu_down_write(struct percpu_rw_semaphore *); @@ -31,4 +32,23 @@ extern void percpu_free_rwsem(struct percpu_rw_semaphore *); __percpu_init_rwsem(brw, #brw, &rwsem_key); \ }) + +#define percpu_rwsem_is_held(sem) lockdep_is_held(&(sem)->rw_sem) + +static inline void percpu_rwsem_release(struct percpu_rw_semaphore *sem, + bool read, unsigned long ip) +{ + lock_release(&sem->rw_sem.dep_map, 1, ip); +#ifdef CONFIG_RWSEM_SPIN_ON_OWNER + if (!read) + sem->rw_sem.owner = NULL; +#endif +} + +static inline void percpu_rwsem_acquire(struct percpu_rw_semaphore *sem, + bool read, unsigned long ip) +{ + lock_acquire(&sem->rw_sem.dep_map, 0, 1, read, 1, NULL, ip); +} + #endif |