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authorTejun Heo <tj@kernel.org>2019-06-27 13:39:48 -0700
committerJens Axboe <axboe@kernel.dk>2019-07-10 09:00:57 -0600
commit9b0eb69b75bccada2d341d7e7ca342f0cb1c9a6a (patch)
treefe6f801bf144743a3f9ac9c336602f855d35ac45 /block
parentfd112c74652371a023f85d87b70bee7169e8f4d0 (diff)
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cgroup, blkcg: Prepare some symbols for module and !CONFIG_CGROUP usages
btrfs is going to use css_put() and wbc helpers to improve cgroup writeback support. Add dummy css_get() definition and export wbc helpers to prepare for module and !CONFIG_CGROUP builds. Reported-by: kbuild test robot <lkp@intel.com> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/blk-cgroup.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 8afa52b0d148..ad7a91dec934 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -48,6 +48,7 @@ struct blkcg blkcg_root;
EXPORT_SYMBOL_GPL(blkcg_root);
struct cgroup_subsys_state * const blkcg_root_css = &blkcg_root.css;
+EXPORT_SYMBOL_GPL(blkcg_root_css);
static struct blkcg_policy *blkcg_policy[BLKCG_MAX_POLS];