arm64: optimize smp_kick_all_cpus
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>
Reviewed-by: York Sun <york.sun@nxp.com>
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 @@
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)