linux-kernel - Re: [PATCH linux-next] null_blk: use sysfs

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Date:   Fri, 21 Oct 2022 18:44:40 +0900
From:   Damien Le Moal <damien.lemoal@...nsource.wdc.com>
To:     yexingchen116@...il.com, axboe@...nel.dk
Cc:     kch@...dia.com, johannes.thumshirn@....com, bvanassche@....org,
        ming.lei@...hat.com, vincent.fu@...sung.com,
        shinichiro.kawasaki@....com, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, ye xingchen <ye.xingchen@....com.cn>
Subject: Re: [PATCH linux-next] null_blk: use sysfs_emit() to instead of
 scnprintf()

On 10/21/22 17:54, yexingchen116@...il.com wrote:
> From: ye xingchen <ye.xingchen@....com.cn>
> 
> Replace the open-code with sysfs_emit() to simplify the code.
> 
> Signed-off-by: ye xingchen <ye.xingchen@....com.cn>

Reviewed-by: Damien Le Moal <damien.lemoal@...nsource.wdc.com>

> ---
>  drivers/block/null_blk/main.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c
> index 1f154f92f4c2..5317ef2ba227 100644
> --- a/drivers/block/null_blk/main.c
> +++ b/drivers/block/null_blk/main.c
> @@ -255,18 +255,18 @@ static inline struct nullb_device *to_nullb_device(struct config_item *item)
>  
>  static inline ssize_t nullb_device_uint_attr_show(unsigned int val, char *page)
>  {
> -	return snprintf(page, PAGE_SIZE, "%u\n", val);
> +	return sysfs_emit(page, "%u\n", val);
>  }
>  
>  static inline ssize_t nullb_device_ulong_attr_show(unsigned long val,
>  	char *page)
>  {
> -	return snprintf(page, PAGE_SIZE, "%lu\n", val);
> +	return sysfs_emit(page, "%lu\n", val);
>  }
>  
>  static inline ssize_t nullb_device_bool_attr_show(bool val, char *page)
>  {
> -	return snprintf(page, PAGE_SIZE, "%u\n", val);
> +	return sysfs_emit(page, "%u\n", val);
>  }
>  
>  static ssize_t nullb_device_uint_attr_store(unsigned int *val,

-- 
Damien Le Moal
Western Digital Research