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s390/cpcmd: Convert to use flag output macros

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Use flag output macros in inline asm to allow for better code generation if
the compiler has support for the flag output constraint.

Reviewed-by: Juergen Christ <jchrist@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2024-11-07 16:11:37 +01:00
parent d4e50cfe9c
commit ca6dd1faa0
1 changed files with 5 additions and 5 deletions
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10
arch/s390/kernel/cpcmd.c
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@ -20,6 +20,7 @@
#include <asm/diag.h>
#include <asm/ebcdic.h>
#include <asm/cpcmd.h>
#include <asm/asm.h>
static DEFINE_SPINLOCK(cpcmd_lock);
static char cpcmd_buf[241];
@ -45,12 +46,11 @@ static int diag8_response(int cmdlen, char *response, int *rlen)
ry.odd = *rlen;
asm volatile(
" diag %[rx],%[ry],0x8\n"
" ipm %[cc]\n"
" srl %[cc],28\n"
: [cc] "=&d" (cc), [ry] "+&d" (ry.pair)
CC_IPM(cc)
: CC_OUT(cc, cc), [ry] "+d" (ry.pair)
: [rx] "d" (rx.pair)
: "cc");
if (cc)
: CC_CLOBBER);
if (CC_TRANSFORM(cc))
*rlen += ry.odd;
else
*rlen = ry.odd;