diff options
| author | Tejun Heo <tj@kernel.org> | 2012-03-05 13:14:55 -0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2012-03-06 21:27:21 +0100 |
| commit | b95ada558c9e69c69ffd6950eb644ee8a3dba18f (patch) | |
| tree | 565eda3f793d6b89623fba41beb93df03ceef696 /block/cfq-iosched.c | |
| parent | 32e380aedc3de454c06ce1c254fe3bea35a676e1 (diff) | |
| download | lwn-b95ada558c9e69c69ffd6950eb644ee8a3dba18f.tar.gz lwn-b95ada558c9e69c69ffd6950eb644ee8a3dba18f.zip | |
cfq: don't register propio policy if !CONFIG_CFQ_GROUP_IOSCHED
cfq has been registering zeroed blkio_poilcy_cfq if CFQ_GROUP_IOSCHED
is disabled. This fortunately doesn't collide with blk-throtl as
BLKIO_POLICY_PROP is zero but is unnecessary and risky. Just don't
register it if not enabled.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/cfq-iosched.c')
| -rw-r--r-- | block/cfq-iosched.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index 457295253566..388fe01de18e 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -3878,8 +3878,6 @@ static struct blkio_policy_type blkio_policy_cfq = { }, .plid = BLKIO_POLICY_PROP, }; -#else -static struct blkio_policy_type blkio_policy_cfq; #endif static int __init cfq_init(void) @@ -3910,14 +3908,17 @@ static int __init cfq_init(void) return ret; } +#ifdef CONFIG_CFQ_GROUP_IOSCHED blkio_policy_register(&blkio_policy_cfq); - +#endif return 0; } static void __exit cfq_exit(void) { +#ifdef CONFIG_CFQ_GROUP_IOSCHED blkio_policy_unregister(&blkio_policy_cfq); +#endif elv_unregister(&iosched_cfq); kmem_cache_destroy(cfq_pool); } |