kern/mutex: make mutex_trylock return ERROR_BUSY instead of 1

1 files changed, 2 insertions, 4 deletions

diff --git a/kern/mutex.h b/kern/mutex.h
index 5ea8061e..64efa350 100644
--- a/kern/mutex.h
+++ b/kern/mutex.h
@@ -24,6 +24,7 @@
 #define _KERN_MUTEX_H
 
 #include <kern/assert.h>
+#include <kern/error.h>
 #include <kern/list.h>
 #include <kern/mutex_i.h>
 #include <kern/mutex_types.h>
@@ -41,9 +42,6 @@ mutex_init(struct mutex *mutex)
 
 #define mutex_assert_locked(mutex) assert((mutex)->state != MUTEX_UNLOCKED)
 
-/*
- * Return 0 on success, 1 if busy.
- */
 static inline int
 mutex_trylock(struct mutex *mutex)
 {
@@ -55,7 +53,7 @@ mutex_trylock(struct mutex *mutex)
         return 0;
     }
 
-    return 1;
+    return ERROR_BUSY;
 }
 
 static inline void