linux-kernel - [PATCH 4/5] lockref: remove homebrew cmpxchg64

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Message-Id: <1436790687-11984-5-git-send-email-will.deacon@arm.com>
Date:	Mon, 13 Jul 2015 13:31:26 +0100
From:	Will Deacon <will.deacon@....com>
To:	linux-arch@...r.kernel.org
Cc:	Waiman.Long@...com, peterz@...radead.org,
	linux-kernel@...r.kernel.org, paulmck@...ux.vnet.ibm.com,
	Will Deacon <will.deacon@....com>
Subject: [PATCH 4/5] lockref: remove homebrew cmpxchg64_relaxed macro definition

cmpxchg64_relaxed is now defined by asm-generic/atomic.h, so we can
remove our local definition from the lockref code.

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

diff --git a/lib/lockref.c b/lib/lockref.c
index 494994bf17c8..5a92189ad711 100644
--- a/lib/lockref.c
+++ b/lib/lockref.c
@@ -4,14 +4,6 @@
 #if USE_CMPXCHG_LOCKREF
 
 /*
- * Allow weakly-ordered memory architectures to provide barrier-less
- * cmpxchg semantics for lockref updates.
- */
-#ifndef cmpxchg64_relaxed
-# define cmpxchg64_relaxed cmpxchg64
-#endif
-
-/*
  * Note that the "cmpxchg()" reloads the "old" value for the
  * failure case.
  */
-- 
2.1.4

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