linux-kernel - [PATCH] atomic.h : x86_64 atomic64_add

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Date:	Thu, 21 Dec 2006 14:42:08 -0500
From:	Mathieu Desnoyers <compudj@...stal.dyndns.org>
To:	linux-kernel@...r.kernel.org, Andrew Morton <akpm@...l.org>,
	Ingo Molnar <mingo@...hat.com>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Christoph Hellwig <hch@...radead.org>
Cc:	Douglas Niehaus <niehaus@...s.ku.edu>,
	"Martin J. Bligh" <mbligh@...igh.org>, ltt-dev@...fik.org,
	Thomas Gleixner <tglx@...utronix.de>,
	systemtap@...rces.redhat.com
Subject: [PATCH] atomic.h : x86_64 atomic64_add_return

atomic64_add_return fix for volatile removal

atomic64_add_return should follow the change done to atomic.h following the
removal of "volatile" in the atomic_t type, just like atomic_add_return.

It applies cleanly on top of my "atomic.h : x86_64" patch posted in this
thread.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>

diff --git a/include/asm-x86_64/atomic.h b/include/asm-x86_64/atomic.h
index e9922ae..3e9f838 100644
--- a/include/asm-x86_64/atomic.h
+++ b/include/asm-x86_64/atomic.h
@@ -375,8 +375,8 @@ static __inline__ long atomic64_add_retu
 	long __i = i;
 	__asm__ __volatile__(
 		LOCK_PREFIX "xaddq %0, %1;"
-		:"=r"(i)
-		:"m"(v->counter), "0"(i));
+		:"+r" (i), "+m" (v->counter)
+		: : "memory");
 	return i + __i;
 }
-- 
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