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arm64: optimize smp_kick_all_cpus

Message ID 1466155967-15330-1-git-send-email-yamada.masahiro@socionext.com
State Accepted
Commit afedf5488de99925f00ead847e40d7ba0d508f0e
Headers show

Commit Message

Masahiro Yamada June 17, 2016, 9:32 a.m. UTC 
gic_kick_secondary_cpus can directly return to the caller of
smp_kick_all_cpus.  We do not have to use x29 register here.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

---

 arch/arm/cpu/armv8/start.S | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

-- 
1.9.1

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diff mbox

Patch

diff --git a/arch/arm/cpu/armv8/start.S b/arch/arm/cpu/armv8/start.S
index c1a2f45..670e323 100644
--- a/arch/arm/cpu/armv8/start.S
+++ b/arch/arm/cpu/armv8/start.S
@@ -258,12 +258,10 @@  ENDPROC(lowlevel_init)
 
 WEAK(smp_kick_all_cpus)
 	/* Kick secondary cpus up by SGI 0 interrupt */
-	mov	x29, lr			/* Save LR */
 #if defined(CONFIG_GICV2) || defined(CONFIG_GICV3)
 	ldr	x0, =GICD_BASE
-	bl	gic_kick_secondary_cpus
+	b	gic_kick_secondary_cpus
 #endif
-	mov	lr, x29			/* Restore LR */
 	ret
 ENDPROC(smp_kick_all_cpus)