On 2020/9/17 20:23, Qinglang Miao wrote:
> Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.
>
> As inode->iprivate equals to third parameter of
> debugfs_create_file() which is NULL. So it's equivalent
> to original code logic.
>
> Signed-off-by: Qinglang Miao <miaoqingl...@huawei.com>
> ---
> v2: based on linux-next(20200917), and can be applied to
> mainline cleanly now.
Added into my test queue. Thanks.
Coly Li
>
> drivers/md/bcache/closure.c | 16 +++-------------
> 1 file changed, 3 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/md/bcache/closure.c b/drivers/md/bcache/closure.c
> index 0164a1fe9..d8d9394a6 100644
> --- a/drivers/md/bcache/closure.c
> +++ b/drivers/md/bcache/closure.c
> @@ -159,7 +159,7 @@ void closure_debug_destroy(struct closure *cl)
>
> static struct dentry *closure_debug;
>
> -static int debug_seq_show(struct seq_file *f, void *data)
> +static int debug_show(struct seq_file *f, void *data)
> {
> struct closure *cl;
>
> @@ -188,17 +188,7 @@ static int debug_seq_show(struct seq_file *f, void *data)
> return 0;
> }
>
> -static int debug_seq_open(struct inode *inode, struct file *file)
> -{
> - return single_open(file, debug_seq_show, NULL);
> -}
> -
> -static const struct file_operations debug_ops = {
> - .owner = THIS_MODULE,
> - .open = debug_seq_open,
> - .read = seq_read,
> - .release = single_release
> -};
> +DEFINE_SHOW_ATTRIBUTE(debug);
>
> void __init closure_debug_init(void)
> {
> @@ -209,7 +199,7 @@ void __init closure_debug_init(void)
> * about this.
> */
> closure_debug = debugfs_create_file(
> - "closures", 0400, bcache_debug, NULL, &debug_ops);
> + "closures", 0400, bcache_debug, NULL, &debug_fops);
> }
> #endif
>
>
