Commit 97f07697 authored by weiping zhang's avatar weiping zhang Committed by Jens Axboe
Browse files

bdi: convert bdi_debug_register to int 



Convert bdi_debug_register to int and then do error handle for it.

Reviewed-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarweiping zhang <zhangweiping@didichuxing.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 0192f175

mm/backing-dev.c

+15 −2
Original line number Diff line number Diff line
@@ -113,11 +113,23 @@ static const struct file_operations bdi_debug_stats_fops = { 
	.release	= single_release,

};



static void bdi_debug_register(struct backing_dev_info *bdi, const char *name)

static int bdi_debug_register(struct backing_dev_info *bdi, const char *name)

{

	if (!bdi_debug_root)

		return -ENOMEM;



	bdi->debug_dir = debugfs_create_dir(name, bdi_debug_root);

	if (!bdi->debug_dir)

		return -ENOMEM;



	bdi->debug_stats = debugfs_create_file("stats", 0444, bdi->debug_dir,

					       bdi, &bdi_debug_stats_fops);

	if (!bdi->debug_stats) {

		debugfs_remove(bdi->debug_dir);

		return -ENOMEM;

	}



	return 0;

}



static void bdi_debug_unregister(struct backing_dev_info *bdi)
@@ -129,9 +141,10 @@ static void bdi_debug_unregister(struct backing_dev_info *bdi) 
static inline void bdi_debug_init(void)

{

}

static inline void bdi_debug_register(struct backing_dev_info *bdi,

static inline int bdi_debug_register(struct backing_dev_info *bdi,

				      const char *name)

{

	return 0;

}

static inline void bdi_debug_unregister(struct backing_dev_info *bdi)

{