linux-kernel - Re: [PATCH] alpha: remove __init annotation from exported page_is

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Date:   Sat, 29 Jul 2023 18:49:58 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Masahiro Yamada <masahiroy@...nel.org>,
        linux-kbuild@...r.kernel.org,
        Richard Henderson <richard.henderson@...aro.org>,
        Ivan Kokshaysky <ink@...assic.park.msu.ru>,
        Matt Turner <mattst88@...il.com>, linux-alpha@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Chen Gong <gong.chen@...ux.intel.com>,
        Tony Luck <tony.luck@...el.com>
Subject: Re: [PATCH] alpha: remove __init annotation from exported
 page_is_ram()



On 7/29/23 00:42, Masahiro Yamada wrote:
> EXPORT_SYMBOL and __init is a bad combination because the .init.text
> section is freed up after the initialization.
> 
> Commit c5a130325f13 ("ACPI/APEI: Add parameter check before error
> injection") exported page_is_ram(), hence the __init annotation should
> be removed.
> 
> This fixes the modpost warning in ARCH=alpha builds:
> 
>   WARNING: modpost: vmlinux: page_is_ram: EXPORT_SYMBOL used for init symbol. Remove __init or EXPORT_SYMBOL.
> 
> Fixes: c5a130325f13 ("ACPI/APEI: Add parameter check before error injection")
> Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>

Reviewed-by: Randy Dunlap <rdunlap@...radead.org>

Thanks.

> ---
> 
>  arch/alpha/kernel/setup.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/arch/alpha/kernel/setup.c b/arch/alpha/kernel/setup.c
> index b650ff1cb022..3d7473531ab1 100644
> --- a/arch/alpha/kernel/setup.c
> +++ b/arch/alpha/kernel/setup.c
> @@ -385,8 +385,7 @@ setup_memory(void *kernel_end)
>  #endif /* CONFIG_BLK_DEV_INITRD */
>  }
>  
> -int __init
> -page_is_ram(unsigned long pfn)
> +int page_is_ram(unsigned long pfn)
>  {
>  	struct memclust_struct * cluster;
>  	struct memdesc_struct * memdesc;

-- 
~Randy