Commit c718aa65 authored by Tejun Heo's avatar Tejun Heo Committed by Linus Torvalds
Browse files

block/loop: convert to idr_alloc() 



Convert to the much saner new idr interface.

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Acked-by: default avatarJens Axboe <axboe@kernel.dk>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent bab998d6

drivers/block/loop.c

+5 −18
Original line number Diff line number Diff line
@@ -1624,30 +1624,17 @@ static int loop_add(struct loop_device **l, int i) 
	if (!lo)

		goto out;



	if (!idr_pre_get(&loop_index_idr, GFP_KERNEL))

		goto out_free_dev;



	/* allocate id, if @id >= 0, we're requesting that specific id */

	if (i >= 0) {

		int m;



		/* create specific i in the index */

		err = idr_get_new_above(&loop_index_idr, lo, i, &m);

		if (err >= 0 && i != m) {

			idr_remove(&loop_index_idr, m);

		err = idr_alloc(&loop_index_idr, lo, i, i + 1, GFP_KERNEL);

		if (err == -ENOSPC)

			err = -EEXIST;

		}

	} else if (i == -1) {

		int m;



		/* get next free nr */

		err = idr_get_new(&loop_index_idr, lo, &m);

		if (err >= 0)

			i = m;

	} else {

		err = -EINVAL;

		err = idr_alloc(&loop_index_idr, lo, 0, 0, GFP_KERNEL);

	}

	if (err < 0)

		goto out_free_dev;

	i = err;



	lo->lo_queue = blk_alloc_queue(GFP_KERNEL);

	if (!lo->lo_queue)