From: Heiko Carstens <hca@linux.ibm.com>
Date: Thu, 1 Jul 2021 10:28:48 +0000 (+0200)
Subject: s390/lib,string: fix strcat() inline asm constraint modifier
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=a0ae5cd235cc32daa0aeb58fa466da2f1042fc8e;p=uclinux-h8%2Flinux.git

s390/lib,string: fix strcat() inline asm constraint modifier

"dummy" is not only used as output but also as input. Therefore use
the correct "+" constraint modifier.

Fixes: 8cf23c8e1fec ("s390/lib,string: get rid of register asm")
Reported-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
---

diff --git a/arch/s390/lib/string.c b/arch/s390/lib/string.c
index ec5b76bde4d8..cfcdf76d6a95 100644
--- a/arch/s390/lib/string.c
+++ b/arch/s390/lib/string.c
@@ -162,7 +162,7 @@ char *strcat(char *dest, const char *src)
 		"	jo	0b\n"
 		"1:	mvst	%[dummy],%[src]\n"
 		"	jo	1b\n"
-		: [dummy] "=&a" (dummy), [dest] "+&a" (dest), [src] "+&a" (src)
+		: [dummy] "+&a" (dummy), [dest] "+&a" (dest), [src] "+&a" (src)
 		:
 		: "cc", "memory", "0");
 	return ret;