diff options
| author | Tejun Heo <tj@kernel.org> | 2019-06-27 23:39:48 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-07-10 18:00:57 +0300 |
| commit | 9b0eb69b75bccada2d341d7e7ca342f0cb1c9a6a (patch) | |
| tree | fe6f801bf144743a3f9ac9c336602f855d35ac45 | |
| parent | fd112c74652371a023f85d87b70bee7169e8f4d0 (diff) | |
| download | linux-9b0eb69b75bccada2d341d7e7ca342f0cb1c9a6a.tar.xz | |
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>
| -rw-r--r-- | block/blk-cgroup.c | 1 | ||||
| -rw-r--r-- | fs/fs-writeback.c | 3 | ||||
| -rw-r--r-- | include/linux/cgroup.h | 1 |
3 files changed, 5 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]; diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 9ebfb1b28430..a8a40bc26c2f 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -270,6 +270,7 @@ void __inode_attach_wb(struct inode *inode, struct page *page) if (unlikely(cmpxchg(&inode->i_wb, NULL, wb))) wb_put(wb); } +EXPORT_SYMBOL_GPL(__inode_attach_wb); /** * locked_inode_to_wb_and_lock_list - determine a locked inode's wb and lock it @@ -582,6 +583,7 @@ void wbc_attach_and_unlock_inode(struct writeback_control *wbc, if (unlikely(wb_dying(wbc->wb))) inode_switch_wbs(inode, wbc->wb_id); } +EXPORT_SYMBOL_GPL(wbc_attach_and_unlock_inode); /** * wbc_detach_inode - disassociate wbc from inode and perform foreign detection @@ -701,6 +703,7 @@ void wbc_detach_inode(struct writeback_control *wbc) wb_put(wbc->wb); wbc->wb = NULL; } +EXPORT_SYMBOL_GPL(wbc_detach_inode); /** * wbc_account_io - account IO issued during writeback diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index 3745ecdad925..852d885df10a 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -699,6 +699,7 @@ void cgroup_path_from_kernfs_id(const union kernfs_node_id *id, struct cgroup_subsys_state; struct cgroup; +static inline void css_get(struct cgroup_subsys_state *css) {} static inline void css_put(struct cgroup_subsys_state *css) {} static inline int cgroup_attach_task_all(struct task_struct *from, struct task_struct *t) { return 0; } |