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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
This commit is contained in:
Linus Torvalds 2010-05-07 14:07:20 -07:00
parent e33b3e7567 0341509fdf
commit 48fe37cb53
3 changed files with 7 additions and 5 deletions
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8
block/blk-cgroup.c
View File

@ -286,16 +286,16 @@ static void blkiocg_destroy(struct cgroup_subsys *subsys, struct cgroup *cgroup)
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);

2
block/cfq-iosched.c
View File

@ -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

2
drivers/block/drbd/drbd_worker.c
View File

@ -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