linux-kernel - Re: [PATCH V1 2/4] ARM: imx: cpu: drop dead code

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Date:   Wed, 29 Apr 2020 10:32:02 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     peng.fan@....com
Cc:     s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
        linux-imx@....com, allison@...utok.net, info@...ux.net,
        Anson.Huang@....com, leonard.crestez@....com, git@...red.net,
        abel.vesa@....com, ard.biesheuvel@...aro.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V1 2/4] ARM: imx: cpu: drop dead code

On Thu, Mar 12, 2020 at 05:17:23PM +0800, peng.fan@....com wrote:
> From: Peng Fan <peng.fan@....com>
> 
> imx_soc_device_init is only called by i.MX6Q/SL/SX/UL/7D/7ULP.
> So we could drop the switch case for i.MX1/2/3/5 which are dead code
> that never be executed.
> 
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
>  arch/arm/mach-imx/cpu.c | 24 ------------------------
>  1 file changed, 24 deletions(-)
> 
> diff --git a/arch/arm/mach-imx/cpu.c b/arch/arm/mach-imx/cpu.c
> index 2df649a84697..0302cb66134b 100644
> --- a/arch/arm/mach-imx/cpu.c
> +++ b/arch/arm/mach-imx/cpu.c
> @@ -108,30 +108,6 @@ static int __init imx_soc_device_init(void)
>  		goto free_soc;
>  
>  	switch (__mxc_cpu_type) {
> -	case MXC_CPU_MX1:
> -		soc_id = "i.MX1";
> -		break;
> -	case MXC_CPU_MX21:
> -		soc_id = "i.MX21";
> -		break;
> -	case MXC_CPU_MX25:
> -		soc_id = "i.MX25";
> -		break;
> -	case MXC_CPU_MX27:
> -		soc_id = "i.MX27";
> -		break;
> -	case MXC_CPU_MX31:
> -		soc_id = "i.MX31";
> -		break;
> -	case MXC_CPU_MX35:
> -		soc_id = "i.MX35";
> -		break;
> -	case MXC_CPU_MX51:
> -		soc_id = "i.MX51";
> -		break;
> -	case MXC_CPU_MX53:
> -		soc_id = "i.MX53";
> -		break;

The code is here to completeness.  If it doesn't get in your way, let's
just keep it.

Shawn

>  	case MXC_CPU_IMX6SL:
>  		ocotp_compat = "fsl,imx6sl-ocotp";
>  		soc_id = "i.MX6SL";
> -- 
> 2.16.4
>