tree b9587f38d5354b3719a90c549fb97507836af4d1
parent 6c1b27ae96b737bf7492ed79c3627a3c30c33ab5
author Tejun Heo <tj@kernel.org> 1438296709 -0400
committer Tejun Heo <tj@kernel.org> 1438296709 -0400

blk-throttle: clean up blkg_policy_data alloc/init/exit/free methods

With the recent addition of alloc and free methods, things became
messier.  This patch reorganizes them according to the followings.

* ->pd_alloc_fn()

  Responsible for allocation and static initializations - the ones
  which can be done independent of where the pd might be attached.

* ->pd_init_fn()

  Initializations which require the knowledge of where the pd is
  attached.

* ->pd_free_fn()

  The counter part of pd_alloc_fn().  Static de-init and freeing.

This leaves ->pd_exit_fn() without any users.  Removed.

While at it, collapse an one liner function throtl_pd_exit(), which
has only one user, into its user.

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