tree 9782354c7f36f1fcc3c2ada7b12937c45b309028
parent 994b78327458ea14a1743196ee0560c73ace37f3
author Tejun Heo <tj@kernel.org> 1439934908 -0700
committer Jens Axboe <axboe@fb.com> 1439938156 -0700

blkcg: remove unnecessary blkcg_root handling from css_alloc/free paths

blkcg_css_alloc() bypasses policy data allocation and blkcg_css_free()
bypasses policy data and blkcg freeing for blkcg_root.  There's no
reason to to treat policy data any differently for blkcg_root.  If the
root css gets allocated after policies are registered, policy
registration path will add policy data; otherwise, the alloc path
will.  The free path isn't never invoked for root csses.

This patch removes the unnecessary special handling of blkcg_root from
css_alloc/free paths.

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