linux-kernel - [PATCH 2/4] x86: fix asm memory constraints in local

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Date:	Sun, 16 Dec 2007 16:54:41 -0800
From:	Harvey Harrison <harvey.harrison@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH 2/4] x86: fix asm memory constraints in local_64.h

Use the shorter +m form rather than =m and m.

Signed-off-by: Harvey Harrison <harvey.harrison@...il.com>
---
 include/asm-x86/local_64.h |   30 ++++++++++++++----------------
 1 files changed, 14 insertions(+), 16 deletions(-)

diff --git a/include/asm-x86/local_64.h b/include/asm-x86/local_64.h
index da61076..7808f53 100644
--- a/include/asm-x86/local_64.h
+++ b/include/asm-x86/local_64.h
@@ -5,32 +5,30 @@ static inline void local_inc(local_t *l)
 {
 	__asm__ __volatile__(
 		"incq %0"
-		:"=m" (l->a.counter)
-		:"m" (l->a.counter));
+		:"+m" (l->a.counter));
 }
 
 static inline void local_dec(local_t *l)
 {
 	__asm__ __volatile__(
 		"decq %0"
-		:"=m" (l->a.counter)
-		:"m" (l->a.counter));
+		:"+m" (l->a.counter));
 }
 
 static inline void local_add(long i, local_t *l)
 {
 	__asm__ __volatile__(
 		"addq %1,%0"
-		:"=m" (l->a.counter)
-		:"ir" (i), "m" (l->a.counter));
+		:"+m" (l->a.counter)
+		:"ir" (i));
 }
 
 static inline void local_sub(long i, local_t *l)
 {
 	__asm__ __volatile__(
 		"subq %1,%0"
-		:"=m" (l->a.counter)
-		:"ir" (i), "m" (l->a.counter));
+		:"+m" (l->a.counter)
+		:"ir" (i));
 }
 
 /**
@@ -48,8 +46,8 @@ static inline int local_sub_and_test(long i, local_t *l)
 
 	__asm__ __volatile__(
 		"subq %2,%0; sete %1"
-		:"=m" (l->a.counter), "=qm" (c)
-		:"ir" (i), "m" (l->a.counter) : "memory");
+		:"+m" (l->a.counter), "=qm" (c)
+		:"ir" (i) : "memory");
 	return c;
 }
 
@@ -67,8 +65,8 @@ static inline int local_dec_and_test(local_t *l)
 
 	__asm__ __volatile__(
 		"decq %0; sete %1"
-		:"=m" (l->a.counter), "=qm" (c)
-		:"m" (l->a.counter) : "memory");
+		:"+m" (l->a.counter), "=qm" (c)
+		: : "memory");
 	return c != 0;
 }
 
@@ -86,8 +84,8 @@ static inline int local_inc_and_test(local_t *l)
 
 	__asm__ __volatile__(
 		"incq %0; sete %1"
-		:"=m" (l->a.counter), "=qm" (c)
-		:"m" (l->a.counter) : "memory");
+		:"+m" (l->a.counter), "=qm" (c)
+		: : "memory");
 	return c != 0;
 }
 
@@ -106,8 +104,8 @@ static inline int local_add_negative(long i, local_t *l)
 
 	__asm__ __volatile__(
 		"addq %2,%0; sets %1"
-		:"=m" (l->a.counter), "=qm" (c)
-		:"ir" (i), "m" (l->a.counter) : "memory");
+		:"+m" (l->a.counter), "=qm" (c)
+		:"ir" (i) : "memory");
 	return c;
 }
 
-- 
1.5.4.rc0.1083.gf568


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