Mike Snitzer b372d360df
dm: convey that all flushes are processed as empty ...
Rename __clone_and_map_flush to __clone_and_map_empty_flush for added
clarity.
Simplify logic associated with REQ_FLUSH conditionals.
Introduce a BUG_ON() and add a few more helpful comments to the code
so that it is clear that all flushes are empty.
Cleanup __split_and_process_bio() so that an empty flush isn't processed
by a 'sector_count' focused while loop.
Signed-off-by: Mike Snitzer <snitzer@redhat.com >
Signed-off-by: Tejun Heo <tj@kernel.org >
Signed-off-by: Jens Axboe <jaxboe@fusionio.com >
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