From 4bfd482e73b30284cb21e10834ce729fa81aa256 Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@kernel.org>
Date: Mon, 5 Mar 2012 13:15:08 -0800
Subject: [PATCH] blkcg: kill blkio_policy_node

Now that blkcg configuration lives in blkg's, blkio_policy_node is no
longer necessary.  Kill it.

blkio_policy_parse_and_set() now fails if invoked for missing device
and functions to print out configurations are updated to print from
blkg's.

cftype_blkg_same_policy() is dropped along with other policy functions
for consistency.  Its one line is open coded in the only user -
blkio_read_blkg_stats().

-v2: Update to reflect the retry-on-bypass logic change of the
     previous patch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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