tree aec73b5cbf9e2c1baed0ecaf03a2a2093df26b6f
parent af5040da01ef980670b3741b3e10733ee3e33566
author Jens Axboe <axboe@fb.com> 1394725122 -0600
committer Jens Axboe <axboe@fb.com> 1394725122 -0600

block: remove old blk_iopoll_enabled variable

This was a debugging measure to toggle enabled/disabled
when testing. But for real production setups, it's not
safe to toggle this setting without either reloading
drivers of quiescing IO first. Neither of which the toggle
enforces.

Additionally, it makes drivers deal with the conditional
state.

Remove it completely. It's up to the driver whether iopoll
is enabled or not.

Signed-off-by: Jens Axboe <axboe@fb.com>