writeback: remove wb_writeback_work->single_wait/done
authorTejun Heo <tj@kernel.org>
Tue, 18 Aug 2015 21:54:53 +0000 (14:54 -0700)
committerJens Axboe <axboe@fb.com>
Tue, 18 Aug 2015 22:49:15 +0000 (15:49 -0700)
commit8a1270cda7b473c8ea71a7a44613465fe0708488
treeb5fa8e5713271a8b16b712e14643e5213cb98883
parent1ed8d48c57bf7400eac7b8dc622ab0413715cafb
writeback: remove wb_writeback_work->single_wait/done

wb_writeback_work->single_wait/done are used for the wait mechanism
for synchronous wb_work (wb_writeback_work) items which are issued
when bdi_split_work_to_wbs() fails to allocate memory for asynchronous
wb_work items; however, there's no reason to use a separate wait
mechanism for this.  bdi_split_work_to_wbs() can simply use on-stack
fallback wb_work item and separate wb_completion to wait for it.

This patch removes wb_work->single_wait/done and the related code and
make bdi_split_work_to_wbs() use on-stack fallback wb_work and
wb_completion instead.

Signed-off-by: Tejun Heo <tj@kernel.org>
Suggested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>
fs/fs-writeback.c