percpu_ida: add percpu_ida_for_each_free
authorShaohua Li <shli@kernel.org>
Tue, 15 Oct 2013 01:05:02 +0000 (09:05 +0800)
committerJens Axboe <axboe@fb.com>
Mon, 30 Mar 2015 18:54:38 +0000 (12:54 -0600)
commitf5d05a7aef18562331a3506360bc8e54466f0634
tree07abff3fbd22371da7fd364a497a384426623cb5
parent9d52221ba37e3f8affb2108958e2fac934183362
percpu_ida: add percpu_ida_for_each_free

Add a new API to iterate free ids. blk-mq-tag will use it.

Note, this doesn't guarantee to iterate all free ids restrictly. Caller
should be aware of this. blk-mq uses it to do sanity check for request
timedout, so can tolerate the limitation.

Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Shaohua Li <shli@fusionio.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
include/linux/percpu_ida.h
lib/percpu_ida.c