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s390/extmem: 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 16:11:46 +01:00
parent 0caf91f6d6
commit 0b7265ae16
1 changed files with 8 additions and 6 deletions
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14
arch/s390/mm/extmem.c
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@ -28,6 +28,7 @@
#include <asm/extmem.h> #include <asm/extmem.h>
#include <asm/cpcmd.h> #include <asm/cpcmd.h>
#include <asm/setup.h> #include <asm/setup.h>
#include <asm/asm.h>
#define DCSS_PURGESEG 0x08 #define DCSS_PURGESEG 0x08
#define DCSS_LOADSHRX 0x20 #define DCSS_LOADSHRX 0x20
@ -134,20 +135,21 @@ dcss_diag(int *func, void *parameter,
unsigned long *ret1, unsigned long *ret2) unsigned long *ret1, unsigned long *ret2)
{ {
unsigned long rx, ry; unsigned long rx, ry;
int rc; int cc;
rx = virt_to_phys(parameter); rx = virt_to_phys(parameter);
ry = (unsigned long) *func; ry = (unsigned long) *func;
diag_stat_inc(DIAG_STAT_X064); diag_stat_inc(DIAG_STAT_X064);
asm volatile( asm volatile(
" diag %0,%1,0x64\n" " diag %[rx],%[ry],0x64\n"
" ipm %2\n" CC_IPM(cc)
" srl %2,28\n" : CC_OUT(cc, cc), [rx] "+d" (rx), [ry] "+d" (ry)
: "+d" (rx), "+d" (ry), "=d" (rc) : : "cc"); :
: CC_CLOBBER);
*ret1 = rx; *ret1 = rx;
*ret2 = ry; *ret2 = ry;
return rc; return CC_TRANSFORM(cc);
} }
static inline int static inline int