blk-cgroup: remove __bio_blkcg

	return task_css(current, io_cgrp_id);

}

/**

 * __bio_blkcg - internal, inconsistent version to get blkcg

 *

 * DO NOT USE.

 * This function is inconsistent and consequently is dangerous to use.  The

 * first part of the function returns a blkcg where a reference is owned by the

 * bio.  This means it does not need to be rcu protected as it cannot go away

 * with the bio owning a reference to it.  However, the latter potentially gets

 * it from task_css().  This can race against task migration and the cgroup

 * dying.  It is also semantically different as it must be called rcu protected

 * and is susceptible to failure when trying to get a reference to it.

 * Therefore, it is not ok to assume that *_get() will always succeed on the

 * blkcg returned here.

 */

static inline struct blkcg *__bio_blkcg(struct bio *bio)

{

	if (bio && bio->bi_blkg)

		return bio->bi_blkg->blkcg;

	return css_to_blkcg(blkcg_css());

}

/**

 * bio_issue_as_root_blkg - see if this bio needs to be issued as root blkg

 * @return: true if this bio needs to be submitted with the root blkg context.

static inline void blkcg_deactivate_policy(struct request_queue *q,

					   const struct blkcg_policy *pol) { }

static inline struct blkcg *__bio_blkcg(struct bio *bio) { return NULL; }

static inline struct blkg_policy_data *blkg_to_pd(struct blkcg_gq *blkg,

						  struct blkcg_policy *pol) { return NULL; }

static inline struct blkcg_gq *pd_to_blkg(struct blkg_policy_data *pd) { return NULL; }