commit 07e4fead45e6e1932f0b960655ab554b6aab6a08
author Omar Sandoval <osandov@fb.com> Wed Jan 25 08:06:40 2017 -0800
committer Jens Axboe <axboe@fb.com> Fri Jan 27 08:17:44 2017 -0700
tree 3e3a021a6232494e0492862660b2856368d7a196
parent b48fda0976a802e0fe4fc0bedefb7cf380ec6426

blk-mq: create debugfs directory tree

In preparation for putting blk-mq debugging information in debugfs,
create a directory tree mirroring the one in sysfs:

    # tree -d /sys/kernel/debug/block
    /sys/kernel/debug/block
    |-- nvme0n1
    |   `-- mq
    |       |-- 0
    |       |   `-- cpu0
    |       |-- 1
    |       |   `-- cpu1
    |       |-- 2
    |       |   `-- cpu2
    |       `-- 3
    |           `-- cpu3
    `-- vda
        `-- mq
            `-- 0
                |-- cpu0
                |-- cpu1
                |-- cpu2
                `-- cpu3

Also add the scaffolding for the actual files that will go in here,
either under the hardware queue or software queue directories.

Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>