From: Heiko Carstens <hca@linux.ibm.com>
Date: Tue, 26 Nov 2024 13:28:26 +0000 (+0100)
Subject: s390/spinlock: Use R constraint for arch_load_niai4()
X-Git-Tag: microblaze-v6.16~498^2~2
X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=84ac96587b2a7a27d2aba250009c45dffb8ab4b6;p=linux-2.6-microblaze.git

s390/spinlock: Use R constraint for arch_load_niai4()

The load instruction used within arch_load_niai4() has a short displacement
and index register. Therefore use the R constraint to reflect this.
The used Q constraint does consider an index register.

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---

diff --git a/arch/s390/lib/spinlock.c b/arch/s390/lib/spinlock.c
index 255c0a8202e7..c27c0f2a8018 100644
--- a/arch/s390/lib/spinlock.c
+++ b/arch/s390/lib/spinlock.c
@@ -77,7 +77,7 @@ static inline int arch_load_niai4(int *lock)
 	asm_inline volatile(
 		ALTERNATIVE("nop", ".insn rre,0xb2fa0000,4,0", ALT_FACILITY(49)) /* NIAI 4 */
 		"	l	%[owner],%[lock]\n"
-		: [owner] "=d" (owner) : [lock] "Q" (*lock) : "memory");
+		: [owner] "=d" (owner) : [lock] "R" (*lock) : "memory");
 	return owner;
 }