tree fdb82527ca458769d3c7381375873931bfb23b19
parent 5ff5afffe6527543866a47ffab12769427283917
author NeilBrown <neilb@suse.de> 1275385053 +1000
committer NeilBrown <neilb@suse.de> 1280114492 +1000

md/bitmap: clean up plugging calls.

1/ use md_unplug in bitmap.c as we will soon be using bitmaps under
  arrays with no queue attached.

2/ Don't bother plugging the queue when we set a bit in the bitmap.
   The reason for this was to encourage as many bits as possible to
   get set before we unplug and write stuff out.
   However every personality already plugs the queue after
   bitmap_startwrite either directly (raid1/raid10) or be setting
   STRIPE_BIT_DELAY which causes the queue to be plugged later
   (raid5).

Signed-off-by: NeilBrown <neilb@suse.de>