Add rm_wowned(9) function to test whether the current thread owns an

exclusive lock on the passed rmlock.

Reviewed by:	ups

2 files changed, 8 insertions, 0 deletions

diff --git a/sys/kern/kern_rmlock.c b/sys/kern/kern_rmlock.c
index 5a91811..276aee6 100644
--- a/sys/kern/kern_rmlock.c
+++ b/sys/kern/kern_rmlock.c
@@ -175,6 +175,13 @@ rm_destroy(struct rmlock *rm)
 	lock_destroy(&rm->lock_object);
 }
 
+int
+rm_wowned(struct rmlock *rm)
+{
+
+	return (mtx_owned(&rm->rm_lock));
+}
+
 void
 rm_sysinit(void *arg)
 {
diff --git a/sys/sys/rmlock.h b/sys/sys/rmlock.h
index 04ccb38..ab0b566 100644
--- a/sys/sys/rmlock.h
+++ b/sys/sys/rmlock.h
@@ -42,6 +42,7 @@
 
 void	rm_init(struct rmlock *rm, const char *name, int opts);
 void	rm_destroy(struct rmlock *rm);
+int	rm_wowned(struct rmlock *rm);
 void	rm_sysinit(void *arg);