From: Brian Behlendorf <behlendorf1@llnl.gov>
Date: Fri, 27 Aug 2010 20:36:24 +0000 (-0700)
Subject: Add MUTEX_NOT_HELD() function
X-Git-Tag: zfs-0.8.0~555^2~537
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=d85e28ad69d87e63894308c34739da59420a582d;p=mirror_zfs.git

Add MUTEX_NOT_HELD() function

Simply implement the missing MUTEX_NOT_HELD() function using
the !MUTEX_HELD construct.
---

diff --git a/include/sys/mutex.h b/include/sys/mutex.h
index ce8c0f4e9..97f49cb2a 100644
--- a/include/sys/mutex.h
+++ b/include/sys/mutex.h
@@ -57,7 +57,8 @@ mutex_owned(kmutex_t *mp)
 	return (ACCESS_ONCE(mp->owner) == current_thread_info());
 }
 
-#define MUTEX_HELD(mp)                  mutex_owned(mp)
+#define MUTEX_HELD(mp)          mutex_owned(mp)
+#define MUTEX_NOT_HELD(mp)      (!MUTEX_HELD(mp))
 #undef mutex_init
 #define mutex_init(mp, name, type, ibc)                                 \
 ({                                                                      \
@@ -150,6 +151,7 @@ mutex_owner(kmutex_t *mp)
 
 #define mutex_owned(mp)         (mutex_owner(mp) == current)
 #define MUTEX_HELD(mp)          mutex_owned(mp)
+#define MUTEX_NOT_HELD(mp)      (!MUTEX_HELD(mp))
 
 /*
  * The following functions must be a #define and not static inline.