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