• Tejun Heo's avatar
    blkcg: restructure statistics printing · d3d32e69
    Tejun Heo authored
    blkcg stats handling is a mess.  None of the stats has much to do with
    blkcg core but they are all implemented in blkcg core.  Code sharing
    is achieved by mixing common code with hard-coded cases for each stat
    This patch restructures statistics printing such that
    * Common logic exists as helper functions and specific print functions
      use the helpers to implement specific cases.
    * Printing functions serving multiple counters don't require hardcoded
      switching on specific counters.
    * Printing uses read_seq_string callback (other methods will be phased
    This change enables further cleanups and relocating stats code to the
    policy implementation it belongs to.
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>