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reiserfs: Make cancel_old_flush() reliable
authorJan Kara <jack@suse.cz>
Wed, 5 Apr 2017 12:09:48 +0000 (14:09 +0200)
committerJan Kara <jack@suse.cz>
Wed, 5 Apr 2017 12:24:16 +0000 (14:24 +0200)
commit71b0576bdb862e964a82c73327cdd1a249c53e67
tree172df641c17c0d88efb755bbc7e8ff35d619ec40
parent65547661500885dde26ca4a75d4d7f7df587c88e
reiserfs: Make cancel_old_flush() reliable

Currently canceling of delayed work that flushes old data using
cancel_old_flush() does not prevent work from being requeued. Thus
in theory new work can be queued after cancel_old_flush() from
reiserfs_freeze() has run. This will become larger problem once
flush_old_commits() can requeue the work itself.

Fix the problem by recording in sbi->work_queue that flushing work is
canceled and should not be requeued.

Signed-off-by: Jan Kara <jack@suse.cz>
fs/reiserfs/journal.c
fs/reiserfs/reiserfs.h
fs/reiserfs/super.c