block: Add BLKROTATIONAL ioctl
authorMartin K. Petersen <martin.petersen@oracle.com>
Wed, 11 Jan 2012 15:29:31 +0000 (16:29 +0100)
committerJens Axboe <axboe@kernel.dk>
Wed, 11 Jan 2012 15:29:31 +0000 (16:29 +0100)
Introduce an ioctl which permits applications to query whether a block
device is rotational.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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