linux-kernel - Re: [PATCH] f2fs: convert to use sysfs

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Message-ID: <3918411a-77fc-48d7-5b80-c4b84203a39c@kernel.org>
Date:   Wed, 5 Apr 2023 10:44:11 +0800
From:   Chao Yu <chao@...nel.org>
To:     Yangtao Li <frank.li@...o.com>, Jaegeuk Kim <jaegeuk@...nel.org>
Cc:     linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] f2fs: convert to use sysfs_emit

On 2023/3/31 19:33, Yangtao Li wrote:
> Let's use sysfs_emit.
> 
> Signed-off-by: Yangtao Li <frank.li@...o.com>
> ---
>   fs/f2fs/sysfs.c | 10 ++--------
>   1 file changed, 2 insertions(+), 8 deletions(-)
> 
> diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
> index 9ddc6ee19433..2c0b2cb05a3a 100644
> --- a/fs/f2fs/sysfs.c
> +++ b/fs/f2fs/sysfs.c
> @@ -312,19 +312,13 @@ static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
>   
>   	if (!strcmp(a->attr.name, "ckpt_thread_ioprio")) {
>   		struct ckpt_req_control *cprc = &sbi->cprc_info;
> -		int len = 0;
>   		int class = IOPRIO_PRIO_CLASS(cprc->ckpt_thread_ioprio);
>   		int data = IOPRIO_PRIO_DATA(cprc->ckpt_thread_ioprio);
>   
> -		if (class == IOPRIO_CLASS_RT)
> -			len += scnprintf(buf + len, PAGE_SIZE - len, "rt,");
> -		else if (class == IOPRIO_CLASS_BE)
> -			len += scnprintf(buf + len, PAGE_SIZE - len, "be,");
> -		else
> +		if (class != IOPRIO_CLASS_RT && class != IOPRIO_CLASS_BE)
>   			return -EINVAL;
>   
> -		len += scnprintf(buf + len, PAGE_SIZE - len, "%d\n", data);
> -		return len;
> +		return sysfs_emit(buf, "%s,%d\n", class == IOPRIO_CLASS_RT ? "rt" : "be", data);

Exceed 80 columns.

Thanks,

>   	}
>   
>   #ifdef CONFIG_F2FS_FS_COMPRESSION