powerpc: mark xer clobbered in csum_add()

addc uses carry so xer is clobbered in csum_add()

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Scott Wood <oss@buserror.net>

diff --git a/arch/powerpc/include/asm/checksum.h b/arch/powerpc/include/asm/checksum.h
index e8d9ef4755a499bae606caa80e2edd14899c0a0d..d2ca07bb88371448bfb15f1797f637ce9a16da3a 100644 (file)
--- 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
 }