linux-kernel - [PATCH] lockref: include mutex.h rather than reinvent arch_mutex_cpu

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Message-Id: <1385560373-9775-1-git-send-email-will.deacon@arm.com>
Date:	Wed, 27 Nov 2013 13:52:53 +0000
From:	Will Deacon <will.deacon@....com>
To:	torvalds@...ux-foundation.org
Cc:	linux-kernel@...r.kernel.org, Will Deacon <will.deacon@....com>
Subject: [PATCH] lockref: include mutex.h rather than reinvent arch_mutex_cpu_relax

arch_mutex_cpu_relax is already conditionally defined in mutex.h, so
simply include that header rather than replicate the code here.

Signed-off-by: Will Deacon <will.deacon@....com>
---
 lib/lockref.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/lib/lockref.c b/lib/lockref.c
index d2b123f8456b..f07a40d33871 100644
--- a/lib/lockref.c
+++ b/lib/lockref.c
@@ -1,5 +1,6 @@
 #include <linux/export.h>
 #include <linux/lockref.h>
+#include <linux/mutex.h>
 
 #if USE_CMPXCHG_LOCKREF
 
@@ -12,14 +13,6 @@
 #endif
 
 /*
- * Allow architectures to override the default cpu_relax() within CMPXCHG_LOOP.
- * This is useful for architectures with an expensive cpu_relax().
- */
-#ifndef arch_mutex_cpu_relax
-# define arch_mutex_cpu_relax() cpu_relax()
-#endif
-
-/*
  * Note that the "cmpxchg()" reloads the "old" value for the
  * failure case.
  */
-- 
1.8.2.2

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