dasd: refactor dasd_ioctl_information
[ Upstream commit 9353848c ] Prepare for in-kernel callers of this functionality. Signed-off-by: Christoph Hellwig <hch@lst.de> [sth@de.ibm.com: remove leftover kfree] Signed-off-by: Stefan Haberland <sth@linux.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com> Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com> Signed-off-by: Jens Axboe <axboe@kernel.dk> Stable-dep-of: ccc45cb4 ("s390/dasd: Use correct lock while counting channel queue length") Signed-off-by: Sasha Levin <sashal@kernel.org>
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