diff options
| author |   Tejun Heo <tj@kernel.org> | 2013-02-27 17:03:58 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-27 19:10:15 -0800 |
| commit | c718aa652d3def382a79c25442c2a830263e52ed (patch) | |
| tree | 7adef67f6031938c442494a985c26371adb26d44 | |
| parent | block: convert to idr_alloc() (diff) | |
| download | linux-dev-c718aa652d3def382a79c25442c2a830263e52ed.tar.xz linux-dev-c718aa652d3def382a79c25442c2a830263e52ed.zip | |
block/loop: convert to idr_alloc()
Convert to the much saner new idr interface.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/block/loop.c | 23 |
1 files changed, 5 insertions, 18 deletions
diff --git a/drivers/block/loop.c b/drivers/block/loop.c index c674e5492ec4..f47dccbda1d4 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -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) |