[PATCH 2/9] powerpc: mark xer clobbered in csum_add()

From	Christophe Leroy <christophe.leroy@c-s.fr>
Newsgroups	linux.kernel
Subject	[PATCH 2/9] powerpc: mark xer clobbered in csum_add()
Date	2015-09-22 16:40 +0200
Message-ID	<qbwTD-86z-7@gated-at.bofh.it> (permalink)
References	<qbwTD-86z-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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addc uses carry so xer is clobbered in csum_add()

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/include/asm/checksum.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/include/asm/checksum.h b/arch/powerpc/include/asm/checksum.h
index e8d9ef4..d2ca07b 100644
--- a/arch/powerpc/include/asm/checksum.h
+++ b/arch/powerpc/include/asm/checksum.h
@@ -141,7 +141,7 @@ static inline __wsum csum_add(__wsum csum, __wsum addend)
 #else
 	asm("addc %0,%0,%1;"
 	    "addze %0,%0;"
-	    : "+r" (csum) : "r" (addend));
+	    : "+r" (csum) : "r" (addend) : "xer");
 	return csum;
 #endif
 }
-- 
2.1.0

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[PATCH 2/9] powerpc: mark xer clobbered in csum_add() Christophe Leroy <christophe.leroy@c-s.fr> - 2015-09-22 16:40 +0200

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