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Diffstat (limited to 'include/asm-generic/rwsem.h')
-rw-r--r--include/asm-generic/rwsem.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/asm-generic/rwsem.h b/include/asm-generic/rwsem.h
index 6c6a2141f271..93e67a055a4d 100644
--- a/include/asm-generic/rwsem.h
+++ b/include/asm-generic/rwsem.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_GENERIC_RWSEM_H
#define _ASM_GENERIC_RWSEM_H
@@ -37,6 +38,16 @@ static inline void __down_read(struct rw_semaphore *sem)
rwsem_down_read_failed(sem);
}
+static inline int __down_read_killable(struct rw_semaphore *sem)
+{
+ if (unlikely(atomic_long_inc_return_acquire(&sem->count) <= 0)) {
+ if (IS_ERR(rwsem_down_read_failed_killable(sem)))
+ return -EINTR;
+ }
+
+ return 0;
+}
+
static inline int __down_read_trylock(struct rw_semaphore *sem)
{
long tmp;