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| author | David S. Miller <davem@davemloft.net> | 2011-07-14 07:56:40 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-07-14 07:56:40 -0700 |
| commit | 6a7ebdf2fd15417e87b4fd02ff411aeaca34da5f (patch) | |
| tree | 86b15d8cd3e25c97b348b5a61bdb16c02726a480 /block/cfq-iosched.c | |
| parent | f6b72b6217f8c24f2a54988e58af858b4e66024d (diff) | |
| parent | 51414d41084496aaefd06d7f19eb8206e8bfac2d (diff) | |
| download | op-kernel-dev-6a7ebdf2fd15417e87b4fd02ff411aeaca34da5f.zip op-kernel-dev-6a7ebdf2fd15417e87b4fd02ff411aeaca34da5f.tar.gz | |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts:
net/bluetooth/l2cap_core.c
Diffstat (limited to 'block/cfq-iosched.c')
| -rw-r--r-- | block/cfq-iosched.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index f379943..ae21919 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -2773,11 +2773,14 @@ static void __cfq_exit_single_io_context(struct cfq_data *cfqd, smp_wmb(); cic->key = cfqd_dead_key(cfqd); + rcu_read_lock(); if (rcu_dereference(ioc->ioc_data) == cic) { + rcu_read_unlock(); spin_lock(&ioc->lock); rcu_assign_pointer(ioc->ioc_data, NULL); spin_unlock(&ioc->lock); - } + } else + rcu_read_unlock(); if (cic->cfqq[BLK_RW_ASYNC]) { cfq_exit_cfqq(cfqd, cic->cfqq[BLK_RW_ASYNC]); @@ -3084,7 +3087,8 @@ cfq_drop_dead_cic(struct cfq_data *cfqd, struct io_context *ioc, spin_lock_irqsave(&ioc->lock, flags); - BUG_ON(ioc->ioc_data == cic); + BUG_ON(rcu_dereference_check(ioc->ioc_data, + lockdep_is_held(&ioc->lock)) == cic); radix_tree_delete(&ioc->radix_root, cfqd->cic_index); hlist_del_rcu(&cic->cic_list); |
