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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-08 01:07:20 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-08 01:07:20 +0400 |
| commit | 48fe37cb53a40e13c2f9fc974f574e38d18be303 (patch) | |
| tree | 688851f7b8bb6ca87bb021a23213bbdb46cc9719 | |
| parent | e33b3e7567f8636c61e79ff1da5ff9a6cf6562c7 (diff) | |
| parent | 0341509fdfc9519f7de6aabc5dd23217cef72b73 (diff) | |
| download | linux-48fe37cb53a40e13c2f9fc974f574e38d18be303.tar.xz | |
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
blk-cgroup: Fix an RCU warning in blkiocg_create()
blk-cgroup: Fix RCU correctness warning in cfq_init_queue()
drbd: don't expose failed local READ to upper layers
| -rw-r--r-- | block/blk-cgroup.c | 8 | ||||
| -rw-r--r-- | block/cfq-iosched.c | 2 | ||||
| -rw-r--r-- | drivers/block/drbd/drbd_worker.c | 2 |
3 files changed, 7 insertions, 5 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 5fe03def34b2..2cc682b860ea 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -286,16 +286,16 @@ done: static struct cgroup_subsys_state * blkiocg_create(struct cgroup_subsys *subsys, struct cgroup *cgroup) { - struct blkio_cgroup *blkcg, *parent_blkcg; + struct blkio_cgroup *blkcg; + struct cgroup *parent = cgroup->parent; - if (!cgroup->parent) { + if (!parent) { blkcg = &blkio_root_cgroup; goto done; } /* Currently we do not support hierarchy deeper than two level (0,1) */ - parent_blkcg = cgroup_to_blkio_cgroup(cgroup->parent); - if (css_depth(&parent_blkcg->css) > 0) + if (parent != cgroup->top_cgroup) return ERR_PTR(-EINVAL); blkcg = kzalloc(sizeof(*blkcg), GFP_KERNEL); diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index 838834be115b..5f127cfb2e92 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -3694,8 +3694,10 @@ static void *cfq_init_queue(struct request_queue *q) * to make sure that cfq_put_cfqg() does not try to kfree root group */ atomic_set(&cfqg->ref, 1); + rcu_read_lock(); blkiocg_add_blkio_group(&blkio_root_cgroup, &cfqg->blkg, (void *)cfqd, 0); + rcu_read_unlock(); #endif /* * Not strictly needed (since RB_ROOT just clears the node and we diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c index 44bf6d11197e..d48a1dfd7b24 100644 --- a/drivers/block/drbd/drbd_worker.c +++ b/drivers/block/drbd/drbd_worker.c @@ -235,7 +235,7 @@ void drbd_endio_pri(struct bio *bio, int error) if (unlikely(error)) { what = (bio_data_dir(bio) == WRITE) ? write_completed_with_error - : (bio_rw(bio) == READA) + : (bio_rw(bio) == READ) ? read_completed_with_error : read_ahead_completed_with_error; } else |