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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 <miaoqinglang@huawei.com>
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Qinglang Miao 2020-10-01 14:50:44 +08:00 committed by Jens Axboe
parent 7e59c506c3
commit 84e5d1363c
1 changed files with 3 additions and 13 deletions
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16
drivers/md/bcache/closure.c
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@ -159,7 +159,7 @@ void closure_debug_destroy(struct closure *cl)
static struct dentry *closure_debug; 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; struct closure *cl;
@ -188,17 +188,7 @@ static int debug_seq_show(struct seq_file *f, void *data)
return 0; return 0;
} }
static int debug_seq_open(struct inode *inode, struct file *file) DEFINE_SHOW_ATTRIBUTE(debug);
{
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
};
void __init closure_debug_init(void) void __init closure_debug_init(void)
{ {
@ -209,7 +199,7 @@ void __init closure_debug_init(void)
* about this. * about this.
*/ */
closure_debug = debugfs_create_file( closure_debug = debugfs_create_file(
"closures", 0400, bcache_debug, NULL, &debug_ops); "closures", 0400, bcache_debug, NULL, &debug_fops);
} }
#endif #endif