block: simplify the check for the current elevator in elv_iosched_show
Just compare the pointers instead of using the string based elevator_match. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20221030100714.876891-6-hch@lst.deSigned-off-by: Jens Axboe <axboe@kernel.dk>
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