block: move struct partition out of genhd.h

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>

4 files changed, 14 insertions, 9 deletions

diff --git a/drivers/scsi/BusLogic.c b/drivers/scsi/BusLogic.c
index 3170b295a5da..186259417449 100644
--- a/drivers/scsi/BusLogic.c
+++ b/drivers/scsi/BusLogic.c
@@ -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;
 
diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index ee6bc2f9b80a..0443b74390cf 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -33,6 +33,7 @@
 #include <linux/syscalls.h>
 #include <linux/delay.h>
 #include <linux/kthread.h>
+#include <linux/msdos_partition.h>
 
 #include <scsi/scsi.h>
 #include <scsi/scsi_cmnd.h>
@@ -328,9 +329,9 @@ static int aac_biosparm(struct scsi_device *sdev, struct block_device *bdev,
 	buf = scsi_bios_ptable(bdev);
 	if (!buf)
 		return 0;
-	if(*(__le16 *)(buf + 0x40) == cpu_to_le16(0xaa55)) {
-		struct partition *first = (struct partition * )buf;
-		struct partition *entry = first;
+	if (*(__le16 *)(buf + 0x40) == cpu_to_le16(MSDOS_LABEL_MAGIC)) {
+		struct msdos_partition *first = (struct msdos_partition *)buf;
+		struct msdos_partition *entry = first;
 		int saved_cylinders = param->cylinders;
 		int num;
 		unsigned char end_head, end_sec;
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 44cb054d5e66..4c6c448dc2df 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -38,6 +38,7 @@
 #include <linux/hrtimer.h>
 #include <linux/uuid.h>
 #include <linux/t10-pi.h>
+#include <linux/msdos_partition.h>
 
 #include <net/checksum.h>
 
@@ -4146,7 +4147,7 @@ static int scsi_debug_host_reset(struct scsi_cmnd *SCpnt)
 static void __init sdebug_build_parts(unsigned char *ramp,
 				      unsigned long store_size)
 {
-	struct partition *pp;
+	struct msdos_partition *pp;
 	int starts[SDEBUG_MAX_PARTS + 2];
 	int sectors_per_part, num_sectors, k;
 	int heads_by_sects, start_sec, end_sec;
@@ -4171,7 +4172,7 @@ static void __init sdebug_build_parts(unsigned char *ramp,
 
 	ramp[510] = 0x55;	/* magic partition markings */
 	ramp[511] = 0xAA;
-	pp = (struct partition *)(ramp + 0x1be);
+	pp = (struct msdos_partition *)(ramp + 0x1be);
 	for (k = 0; starts[k + 1]; ++k, ++pp) {
 		start_sec = starts[k];
 		end_sec = starts[k + 1] - 1;
diff --git a/drivers/scsi/scsicam.c b/drivers/scsi/scsicam.c
index 665d7db2f94c..682cf08ab041 100644
--- a/drivers/scsi/scsicam.c
+++ b/drivers/scsi/scsicam.c
@@ -17,6 +17,7 @@
 #include <linux/genhd.h>
 #include <linux/kernel.h>
 #include <linux/blkdev.h>
+#include <linux/msdos_partition.h>
 #include <asm/unaligned.h>
 
 #include <scsi/scsicam.h>
@@ -61,7 +62,7 @@ bool scsi_partsize(struct block_device *bdev, sector_t capacity, int geom[3])
 {
 	int cyl, ext_cyl, end_head, end_cyl, end_sector;
 	unsigned int logical_end, physical_end, ext_physical_end;
-	struct partition *p, *largest = NULL;
+	struct msdos_partition *p, *largest = NULL;
 	void *buf;
 	int ret = false;