commit 400f73b23f457a82288814e21af57dbc9f3f2afd
author Omar Sandoval <osandov@fb.com> Fri Jan 27 15:03:01 2017 -0700
committer Jens Axboe <axboe@fb.com> Fri Jan 27 15:03:01 2017 -0700
tree 02e545b69739e1577c97f37ece486ccb555b8249
parent f3a8ab7d55bc49b44baa229723e0b5b6ebacac4a

blk-mq: fix debugfs compilation issues

This fixes a couple of problems:

1. In the !CONFIG_DEBUG_FS case, the stub definitions were bogus.
2. In the !CONFIG_BLOCK case, blk-mq-debugfs.c shouldn't be compiled at
   all.

Fix the stub definitions and add a CONFIG_BLK_DEBUG_FS Kconfig option.

Fixes: 07e4fead45e6 ("blk-mq: create debugfs directory tree")
Signed-off-by: Omar Sandoval <osandov@fb.com>

Augment Kconfig description.

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