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s390/diag: 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 16:11:44 +01:00
parent 5a5897d65b
commit a6122f690a
1 changed files with 6 additions and 6 deletions
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12
arch/s390/kernel/diag.c
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@ -16,6 +16,7 @@
#include <asm/diag.h>
#include <asm/trace/diag.h>
#include <asm/sections.h>
#include <asm/asm.h>
#include "entry.h"
struct diag_stat {
@ -307,16 +308,15 @@ EXPORT_SYMBOL(diag26c);
int diag49c(unsigned long subcode)
{
int rc;
int cc;
diag_stat_inc(DIAG_STAT_X49C);
asm volatile(
" diag %[subcode],0,0x49c\n"
" ipm %[rc]\n"
" srl %[rc],28\n"
: [rc] "=d" (rc)
CC_IPM(cc)
: CC_OUT(cc, cc)
: [subcode] "d" (subcode)
: "cc");
return rc;
: CC_CLOBBER);
return CC_TRANSFORM(cc);
}
EXPORT_SYMBOL(diag49c);