linux-kernel - Re: [PATCH] lib/Kconfig.debug: add ARCH dependency for FUNCTION

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Message-Id: <20220303174550.4baa4d6d228320f09807c987@linux-foundation.org>
Date:   Thu, 3 Mar 2022 17:45:50 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Feng Tang <feng.tang@...el.com>
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        kernel test robot <lkp@...el.com>,
        linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        Guo Ren <guoren@...nel.org>
Subject: Re: [PATCH] lib/Kconfig.debug: add ARCH dependency for
 FUNCTION_ALIGN option

On Thu,  3 Mar 2022 16:20:48 +0800 Feng Tang <feng.tang@...el.com> wrote:

> 0Day robots reported there is compiling issue for 'csky' ARCH
> when CONFIG_DEBUG_FORCE_DATA_SECTION_ALIGNED is enabled [1]:
> 
> ...
>
> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -401,8 +401,8 @@ config SECTION_MISMATCH_WARN_ONLY
>  	  If unsure, say Y.
>  
>  config DEBUG_FORCE_FUNCTION_ALIGN_64B
> -	bool "Force all function address 64B aligned" if EXPERT
> -	depends on PPC || ARM || X86

I cannot find a kernel which contains the above line?

> +	bool "Force all function address 64B aligned"
> +	depends on EXPERT && (X86_64 || ARM64 || PPC32 || PPC64 || ARC)
>  	help
>  	  There are cases that a commit from one domain changes the function
>  	  address alignment of other domains, and cause magic performance