tree cd7ecd917b294a92ff827b0e7dab526f0069547f
parent 703fd1c0f177219e3a84e6c095c31dc566514d81
author Omar Sandoval <osandov@fb.com> 1474123124 -0600
committer Jens Axboe <axboe@fb.com> 1474123124 -0600

blk-mq: abstract tag allocation out into sbitmap library

This is a generally useful data structure, so make it available to
anyone else who might want to use it. It's also a nice cleanup
separating the allocation logic from the rest of the tag handling logic.

The code is behind a new Kconfig option, CONFIG_SBITMAP, which is only
selected by CONFIG_BLOCK for now.

This should be a complete noop functionality-wise.

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