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block: move struct partition out of genhd.h

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struct partition is the on-disk format of a MSDOS partition table entry.
Move it out of genhd.h into a new msdos_partition.h header and give it
a msdos_ prefix to avoid confusion.
Also move the magic number from block/partitions/msdos.h to the new
header so that it can be used by the SCSI drivers looking at the DOS
partition tables.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2020-03-24 08:25:26 +01:00
committed by Jens Axboe
parent cbb5cb3b29
commit 1442f76d43
9 changed files with 51 additions and 47 deletions
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8
drivers/scsi/BusLogic.c
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@@ -36,6 +36,7 @@
#include <linux/jiffies.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <linux/msdos_partition.h>
#include <scsi/scsicam.h>
#include <asm/dma.h>
@@ -3410,9 +3411,10 @@ static int blogic_diskparam(struct scsi_device *sdev, struct block_device *dev,
a partition table entry whose end_head matches one of the
standard BusLogic geometry translations (64/32, 128/32, or 255/63).
*/
if (*(unsigned short *) (buf + 64) == 0xAA55) {
struct partition *part1_entry = (struct partition *) buf;
struct partition *part_entry = part1_entry;
if (*(unsigned short *) (buf + 64) == MSDOS_LABEL_MAGIC) {
struct msdos_partition *part1_entry =
(struct msdos_partition *)buf;
struct msdos_partition *part_entry = part1_entry;
int saved_cyl = diskparam->cylinders, part_no;
unsigned char part_end_head = 0, part_end_sector = 0;