Commit 13589864 authored by Tejun Heo's avatar Tejun Heo Committed by Jens Axboe
Browse files

blkcg: __blkg_lookup_create() doesn't need radix preload



There's no point in calling radix_tree_preload() if preloading doesn't
use more permissible GFP mask.  Drop preloading from
__blkg_lookup_create().

While at it, drop sparse locking annotation which no longer applies.

v2: Vivek pointed out the odd preload usage.  Instead of updating,
    just drop it.
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Acked-by: default avatarVivek Goyal <vgoyal@redhat.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 6d935928
......@@ -177,7 +177,6 @@ EXPORT_SYMBOL_GPL(blkg_lookup);
static struct blkcg_gq *__blkg_lookup_create(struct blkcg *blkcg,
struct request_queue *q)
__releases(q->queue_lock) __acquires(q->queue_lock)
{
struct blkcg_gq *blkg;
int ret;
......@@ -203,10 +202,6 @@ static struct blkcg_gq *__blkg_lookup_create(struct blkcg *blkcg,
goto err_put;
/* insert */
ret = radix_tree_preload(GFP_ATOMIC);
if (ret)
goto err_free;
spin_lock(&blkcg->lock);
ret = radix_tree_insert(&blkcg->blkg_tree, q->id, blkg);
if (likely(!ret)) {
......@@ -215,14 +210,11 @@ static struct blkcg_gq *__blkg_lookup_create(struct blkcg *blkcg,
}
spin_unlock(&blkcg->lock);
radix_tree_preload_end();
if (!ret)
return blkg;
err_free:
blkg_free(blkg);
err_put:
css_put(&blkcg->css);
blkg_free(blkg);
return ERR_PTR(ret);
}
......
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