tree 0feeef45e4b0fca3c02cf11e13a54d4607535e1a
parent d852564f8c88b0604490234fdeeb6fb47e4bcc7a
author Jens Axboe <axboe@fb.com> 1401293741 -0600
committer Jens Axboe <axboe@fb.com> 1401293741 -0600

blk-mq: add file comments and update copyright notices

None of the blk-mq files have an explanatory comment at the top
for what that particular file does. Add that and add appropriate
copyright notices as well.

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