blkcg: drop BLKCG_STAT_{PRIV|POL|OFF} macros

Now that all stat handling code lives in policy implementations,
there's no need to encode policy ID in cft->private.

* Export blkcg_prfill_[rw]stat() from blkcg, remove
  blkcg_print_[rw]stat(), and implement cfqg_print_[rw]stat() which
  use hard-code BLKIO_POLICY_PROP.

* Use cft->private for offset of the target field directly and drop
  BLKCG_STAT_{PRIV|POL|OFF}().

Signed-off-by: Tejun Heo <tj@kernel.org>

1 files changed, 2 insertions, 9 deletions

diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h
index c930895bfac..ca0ff7c0ffb 100644
--- a/block/blk-cgroup.h
+++ b/block/blk-cgroup.h
@@ -34,11 +34,6 @@ enum blkio_policy_id {
 #define CFQ_WEIGHT_MAX          1000
 #define CFQ_WEIGHT_DEFAULT      500
 
-/* cft->private [un]packing for stat printing */
-#define BLKCG_STAT_PRIV(pol, off)       (((unsigned)(pol) << 16) | (off))
-#define BLKCG_STAT_POL(prv)             ((unsigned)(prv) >> 16)
-#define BLKCG_STAT_OFF(prv)             ((unsigned)(prv) & 0xffff)
-
 enum blkg_rwstat_type {
         BLKG_RWSTAT_READ,
         BLKG_RWSTAT_WRITE,
@@ -131,10 +126,8 @@ void blkcg_print_blkgs(struct seq_file *sf, struct blkio_cgroup *blkcg,
 u64 __blkg_prfill_u64(struct seq_file *sf, void *pdata, u64 v);
 u64 __blkg_prfill_rwstat(struct seq_file *sf, void *pdata,
                          const struct blkg_rwstat *rwstat);
-int blkcg_print_stat(struct cgroup *cgrp, struct cftype *cft,
-                     struct seq_file *sf);
-int blkcg_print_rwstat(struct cgroup *cgrp, struct cftype *cft,
-                       struct seq_file *sf);
+u64 blkg_prfill_stat(struct seq_file *sf, void *pdata, int off);
+u64 blkg_prfill_rwstat(struct seq_file *sf, void *pdata, int off);
 
 struct blkg_conf_ctx {
         struct gendisk          *disk;