Fix paren usage in <sys/mutex.h>.

diff --git a/sys/sys/mutex.h b/sys/sys/mutex.h
index 4cc3e01..5af49e1 100644 (file)
--- a/sys/sys/mutex.h
+++ b/sys/sys/mutex.h
@@ -83,7 +83,7 @@ typedef struct mtx *mtx_t;
 #define MTX_PCATCH     0x00000001
 
 #define MTX_OWNER_NONE NULL
-#define MTX_OWNER_ANON (struct thread *)-2)
+#define MTX_OWNER_ANON ((struct thread *)-2)
 
 #define MTX_LINK_IDLE          0
 #define MTX_LINK_ABORTED       -1