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 <miaoqinglang@xxxxxxxxxx>
---
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
