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| author |   Heiko Carstens <hca@linux.ibm.com> | 2021-03-22 16:12:56 +0100 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2021-04-12 12:46:43 +0200 |
| commit | 4f9abb7e70f2f4808f0fce36b66232890201c6a3 (patch) | |
| tree | 675d179b4458eca914a272f4e662eb1d2b922cdc /arch/s390 | |
| parent | s390/atomic,cmpxchg: switch to use atomic-instrumented.h (diff) | |
| download | linux-dev-4f9abb7e70f2f4808f0fce36b66232890201c6a3.tar.xz linux-dev-4f9abb7e70f2f4808f0fce36b66232890201c6a3.zip | |
s390/spinlock: use R constraint in inline assembly
Allow the compiler to generate slightly better code by using the R
constraint.
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/spinlock.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/include/asm/spinlock.h b/arch/s390/include/asm/spinlock.h index 3a37172d5398..ef59588a3042 100644 --- a/arch/s390/include/asm/spinlock.h +++ b/arch/s390/include/asm/spinlock.h @@ -88,7 +88,7 @@ static inline void arch_spin_unlock(arch_spinlock_t *lp) asm_inline volatile( ALTERNATIVE("", ".long 0xb2fa0070", 49) /* NIAI 7 */ " sth %1,%0\n" - : "=Q" (((unsigned short *) &lp->lock)[1]) + : "=R" (((unsigned short *) &lp->lock)[1]) : "d" (0) : "cc", "memory"); } |