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arm64: optimize smp_kick_all_cpus

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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>
This commit is contained in:
Masahiro Yamada 2016-06-17 18:32:47 +09:00 committed by Tom Rini
parent a2cfc8d593
commit afedf5488d
1 changed files with 1 additions and 3 deletions
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4
arch/arm/cpu/armv8/start.S
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@ -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)