Convert to the much saner new idr interface.
Signed-off-by: Tejun Heo <t...@kernel.org>
Cc: Jens Axboe <ax...@kernel.dk>
---
This patch depends on an earlier idr changes and I think it would be
best to route these together through -mm. Please holler if there's
any objection. Thanks.
drivers/block/loop.c | 23 +++++------------------
1 file changed, 5 insertions(+), 18 deletions(-)
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 3b9c32b..dafbfdb 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)
--
1.8.1
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
