linux-kernel - Re: [PATCH v1] LoongArch: Remove dead code in relocate_new

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Date:   Tue, 19 Sep 2023 17:24:17 +0800
From:   Jinyang He <hejinyang@...ngson.cn>
To:     Tiezhu Yang <yangtiezhu@...ngson.cn>,
        Huacai Chen <chenhuacai@...nel.org>
Cc:     loongarch@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] LoongArch: Remove dead code in relocate_new_kernel

Not need my tag. Youling found that before, and simply talked about it 
to me.

Thanks.


On 2023-09-19 17:07, Tiezhu Yang wrote:
> The initial aim is to silence the following objtool warning:
>
> arch/loongarch/kernel/relocate_kernel.o: warning: objtool: relocate_new_kernel+0x74: unreachable instruction
>
> There are two adjacent "b" instructions, the second one is unreachable,
> it is dead code, just remove it.
>
> Co-developed-by: Jinyang He <hejinyang@...ngson.cn>
> Signed-off-by: Jinyang He <hejinyang@...ngson.cn>
> Co-developed-by: Youling Tang <tangyouling@...ngson.cn>
> Signed-off-by: Youling Tang <tangyouling@...ngson.cn>
> Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
> ---
>   arch/loongarch/kernel/relocate_kernel.S | 1 -
>   1 file changed, 1 deletion(-)
>
> diff --git a/arch/loongarch/kernel/relocate_kernel.S b/arch/loongarch/kernel/relocate_kernel.S
> index d132525..f49f6b0 100644
> --- a/arch/loongarch/kernel/relocate_kernel.S
> +++ b/arch/loongarch/kernel/relocate_kernel.S
> @@ -72,7 +72,6 @@ copy_word:
>   	LONG_ADDI	s5, s5, -1
>   	beqz		s5, process_entry
>   	b		copy_word
> -	b		process_entry
>   
>   done:
>   	ibar		0