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

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

Fixes: 8cf23c8e1f ("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>
This commit is contained in:
Heiko Carstens 2021-07-01 12:28:48 +02:00 committed by Vasily Gorbik
parent a029a4eab3
commit a0ae5cd235
1 changed files with 1 additions and 1 deletions
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arch/s390/lib/string.c
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@ -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;