[U-Boot] [PATCH] arm64: optimize smp_kick_all_cpus

[york sun]

On 06/17/2016 02:32 AM, Masahiro Yamada wrote:
> 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 at socionext.com>
> ---
>
>   arch/arm/cpu/armv8/start.S | 4 +---
>   1 file changed, 1 insertion(+), 3 deletions(-)
>
> 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)
>
>

Reviewed-by: York Sun <york.sun at nxp.com>