2020-09-17 12:45:33

by Qinglang Miao

Subject: [PATCH -next v2] bcache: Convert to DEFINE_SHOW_ATTRIBUTE

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 <[email protected]>
---
v2: based on linux-next(20200917), and can be applied to
mainline cleanly now.

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

--
2.23.0

2020-09-18 10:15:59

by Coly Li

Subject: Re: [PATCH -next v2] bcache: Convert to DEFINE_SHOW_ATTRIBUTE

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 <[email protected]>
> ---
> 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
>
>