• Tejun Heo's avatar
    blkcg: move blkio_group_stats to cfq-iosched.c · 155fead9
    Tejun Heo authored
    
    
    blkio_group_stats contains only fields used by cfq and has no reason
    to be defined in blkcg core.
    
    * Move blkio_group_stats to cfq-iosched.c and rename it to cfqg_stats.
    
    * blkg_policy_data->stats is replaced with cfq_group->stats.
      blkg_prfill_[rw]stat() are updated to use offset against pd->pdata
      instead.
    
    * All related macros / functions are renamed so that they have cfqg_
      prefix and the unnecessary @pol arguments are dropped.
    
    * All stat functions now take cfq_group * instead of blkio_group *.
    
    * lockdep assertion on queue lock dropped.  Elevator runs under queue
      lock by default.  There isn't much to be gained by adding lockdep
      assertions at stat function level.
    
    * cfqg_stats_reset() implemented for blkio_reset_group_stats_fn method
      so that cfqg->stats can be reset.
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>
    155fead9