• Tejun Heo's avatar
    block: move stats from disk to part0 · 074a7aca
    Tejun Heo authored
    Move stats related fields - stamp, in_flight, dkstats - from disk to
    part0 and unify stat handling such that...
    
    * part_stat_*() now updates part0 together if the specified partition
      is not part0.  ie. part_stat_*() are now essentially all_stat_*().
    
    * {disk|all}_stat_*() are gone.
    
    * part_round_stats() is updated similary.  It handles part0 stats
      automatically and disk_round_stats() is killed.
    
    * part_{inc|dec}_in_fligh() is implemented which automatically updates
      part0 stats for parts other than part0.
    
    * disk_map_sector_rcu() is updated to return part0 if no part matches.
      Combined with the above changes, this makes NULL special case
      handling in callers unnecessary.
    
    * Separate stats show code paths for disk are collapsed into part
      stats show code paths.
    
    * Rename disk_stat_lock/unlock() to part_stat_lock/unlock()
    
    While at it, reposition stat handling macros a bit and add missing
    parentheses around macro parameters.
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>
    Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
    074a7aca
genhd.h 16.9 KB