block: enumify ELEVATOR_*_MERGE

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Switch these constants to an enum, and make let the compiler ensure that
all callers of blk_try_merge and elv_merge handle all potential values.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>

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Christoph Hellwig 2017-02-08 14:46:48 +01:00 • committed by Jens Axboe

parent 6cf7677f1a

commit 34fe7c0540

10 changed files with 102 additions and 101 deletions

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include/linux/elevator.h

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