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block: fix a build error

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The code is only for blkcg not for all cgroups

Fixes: d4478e92d6 ("block/loop: make loop cgroup aware")
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Shaohua Li 2017-09-26 11:02:12 -07:00 • committed by Jens Axboe
parent 9979d545c9
commit 0b508bc926
3 changed files with 6 additions and 6 deletions
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8
kernel/kthread.c
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@ -46,7 +46,7 @@ struct kthread {
void *data;
struct completion parked;
struct completion exited;
#ifdef CONFIG_CGROUPS
#ifdef CONFIG_BLK_CGROUP
struct cgroup_subsys_state *blkcg_css;
#endif
};
@ -83,7 +83,7 @@ void free_kthread_struct(struct task_struct *k)
* or if kmalloc() in kthread() failed.
*/
kthread = to_kthread(k);
#ifdef CONFIG_CGROUPS
#ifdef CONFIG_BLK_CGROUP
WARN_ON_ONCE(kthread && kthread->blkcg_css);
#endif
kfree(kthread);
@ -224,7 +224,7 @@ static int kthread(void *_create)
self->data = data;
init_completion(&self->exited);
init_completion(&self->parked);
#ifdef CONFIG_CGROUPS
#ifdef CONFIG_BLK_CGROUP
self->blkcg_css = NULL;
#endif
current->vfork_done = &self->exited;
@ -1166,7 +1166,7 @@ void kthread_destroy_worker(struct kthread_worker *worker)
}
EXPORT_SYMBOL(kthread_destroy_worker);
#ifdef CONFIG_CGROUPS
#ifdef CONFIG_BLK_CGROUP
/**
* kthread_associate_blkcg - associate blkcg to current kthread
* @css: the cgroup info