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Commit c2ee070f authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
Browse files

block: cache the partition index in struct block_device 



Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 807d4af2

fs/block_dev.c

+1 −0
Original line number Diff line number Diff line
@@ -1451,6 +1451,7 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part) 
		bdev->bd_disk = disk;

		bdev->bd_queue = disk->queue;

		bdev->bd_contains = bdev;

		bdev->bd_partno = partno;



		if (!partno) {

			ret = -ENXIO;

include/linux/fs.h

+1 −0
Original line number Diff line number Diff line
@@ -427,6 +427,7 @@ struct block_device { 
#endif

	struct block_device *	bd_contains;

	unsigned		bd_block_size;

	u8			bd_partno;

	struct hd_struct *	bd_part;

	/* number of times partitions within this device have been opened. */

	unsigned		bd_part_count;