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block: remove obsolete comments for blkdev_issue_zeroout.
barrier is already removed, so remove the obsolete comments in blkdev_issue_zeroout. Cc: Jens Axboe <jaxboe@fusionio.com> Signed-off-by: Tao Ma <boyu.mt@taobao.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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@ -140,8 +140,6 @@ static void bio_batch_end_io(struct bio *bio, int err)
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*
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* Description:
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* Generate and issue number of bios with zerofiled pages.
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* Send barrier at the beginning and at the end if requested. This guarantie
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* correct request ordering. Empty barrier allow us to avoid post queue flush.
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*/
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int blkdev_issue_zeroout(struct block_device *bdev, sector_t sector,
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