writeback: Generalize and expose wb_completion

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wb_completion is used to track writeback completions.  We want to use
it from memcg side for foreign inode flushes.  This patch updates it
to remember the target waitq instead of assuming bdi->wb_waitq and
expose it outside of fs-writeback.c.

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Tejun Heo 2019-08-26 09:06:52 -07:00 • committed by Jens Axboe

parent 38b4e09fbc

commit 5b9cce4c7e

3 changed files with 36 additions and 33 deletions

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20

include/linux/backing-dev-defs.h

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2

include/linux/backing-dev.h

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