• Tejun Heo's avatar
    blkcg: move blkio_group_stats_cpu and friends to blk-throttle.c · 8a3d2615
    Tejun Heo authored
    
    
    blkio_group_stats_cpu is used only by blk-throtl and has no reason to
    be defined in blkcg core.
    
    * Move blkio_group_stats_cpu to blk-throttle.c and rename it to
      tg_stats_cpu.
    
    * blkg_policy_data->stats_cpu is replaced with throtl_grp->stats_cpu.
      prfill functions updated accordingly.
    
    * All related macros / functions are renamed so that they have tg_
      prefix and the unnecessary @pol arguments are dropped.
    
    * Per-cpu stats allocation code is also moved from blk-cgroup.c to
      blk-throttle.c and gets simplified to only deal with
      BLKIO_POLICY_THROTL.  percpu stat free is performed by the exit
      method throtl_exit_blkio_group().
    
    * throtl_reset_group_stats() implemented for
      blkio_reset_group_stats_fn method so that tg->stats_cpu can be
      reset.
    
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>
    8a3d2615