linux-kernel - Re: [PATCH v3] checksyscalls: Ignore fstat to silence build warning on LoongArch

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Date:   Sun, 9 Oct 2022 12:33:57 +0800
From:   Tiezhu Yang <yangtiezhu@...ngson.cn>
To:     Huacai Chen <chenhuacai@...nel.org>,
        WANG Xuerui <kernel@...0n.name>, Arnd Bergmann <arnd@...db.de>
Cc:     loongarch@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v3] checksyscalls: Ignore fstat to silence build warning
 on LoongArch



On 08/30/2022 11:27 AM, Tiezhu Yang wrote:
> fstat is replaced by statx on the new architecture, so an exception
> is added to the checksyscalls script to silence the following build
> warning on LoongArch:
>
>   CALL    scripts/checksyscalls.sh
> <stdin>:569:2: warning: #warning syscall fstat not implemented [-Wcpp]

Hi all,

The above warning still exists when build the latest loongarch-next.

Do you know which tree this patch will go through?

Could you please pick it up via your tree in this merge window?

https://lore.kernel.org/lkml/1661830021-8643-1-git-send-email-yangtiezhu@loongson.cn/

Thanks,
Tiezhu

>
> Suggested-by: WANG Xuerui <kernel@...0n.name>
> Suggested-by: Arnd Bergmann <arnd@...db.de>
> Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
> ---
>
> Hi Xuerui and Arnd,
>
> Thank you for your reviews and suggestions.
>
> v3:
>   -- Move the definition to its own block with some explanation
>
> v2:
>   -- Change scripts/checksyscalls.sh
>   -- Modify patch subject and commit message
>
>  scripts/checksyscalls.sh | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/scripts/checksyscalls.sh b/scripts/checksyscalls.sh
> index f33e61a..1e5d2ee 100755
> --- a/scripts/checksyscalls.sh
> +++ b/scripts/checksyscalls.sh
> @@ -114,7 +114,6 @@ cat << EOF
>  #define __IGNORE_truncate
>  #define __IGNORE_stat
>  #define __IGNORE_lstat
> -#define __IGNORE_fstat
>  #define __IGNORE_fcntl
>  #define __IGNORE_fadvise64
>  #define __IGNORE_newfstatat
> @@ -255,6 +254,9 @@ cat << EOF
>  /* 64-bit ports never needed these, and new 32-bit ports can use statx */
>  #define __IGNORE_fstat64
>  #define __IGNORE_fstatat64
> +
> +/* Newer ports are not required to provide fstat in favor of statx */
> +#define __IGNORE_fstat
>  EOF
>  }
>
>