Module Name: src
Committed By: riastradh
Date: Mon Aug 27 07:47:01 UTC 2018
Modified Files:
src/sys/external/bsd/drm2/include/linux: rwsem.h
Log Message:
Add down_read_trylock and downgrade_write.
To generate a diff of this commit:
cvs rdiff -u -r1.1 -r1.2 src/sys/external/bsd/drm2/include/linux/rwsem.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/external/bsd/drm2/include/linux/rwsem.h
diff -u src/sys/external/bsd/drm2/include/linux/rwsem.h:1.1 src/sys/external/bsd/drm2/include/linux/rwsem.h:1.2
--- src/sys/external/bsd/drm2/include/linux/rwsem.h:1.1 Wed Jul 16 20:59:58 2014
+++ src/sys/external/bsd/drm2/include/linux/rwsem.h Mon Aug 27 07:47:01 2018
@@ -1,4 +1,4 @@
-/* $NetBSD: rwsem.h,v 1.1 2014/07/16 20:59:58 riastradh Exp $ */
+/* $NetBSD: rwsem.h,v 1.2 2018/08/27 07:47:01 riastradh Exp $ */
/*-
* Copyright (c) 2014 The NetBSD Foundation, Inc.
@@ -70,6 +70,13 @@ down_read(struct rw_semaphore *rwsem)
rw_enter(&rwsem->rws_lock, RW_READER);
}
+static inline bool
+down_read_trylock(struct rw_semaphore *rwsem)
+{
+
+ return rw_tryenter(&rwsem->rws_lock, RW_READER);
+}
+
static inline void
down_write(struct rw_semaphore *rwsem)
{
@@ -91,4 +98,11 @@ up_write(struct rw_semaphore *rwsem)
rw_exit(&rwsem->rws_lock);
}
+static inline void
+downgrade_write(struct rw_semaphore *rwsem)
+{
+
+ rw_downgrade(&rwsem->rws_lock);
+}
+
#endif /* _LINUX_RWSEM_H_ */
