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Diffstat (limited to 'include')
-rw-r--r--include/linux/genhd.h13
-rw-r--r--include/linux/major.h2
2 files changed, 12 insertions, 3 deletions
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index ac8a901f200..6fc53242406 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -113,13 +113,15 @@ struct hd_struct {
#define GENHD_FL_FAIL 64
struct gendisk {
- /* major, first_minor and minors are input parameters only,
- * don't use directly. Use disk_devt() and disk_max_parts().
+ /* major, first_minor, minors and ext_minors are input
+ * parameters only, don't use directly. Use disk_devt() and
+ * disk_max_parts().
*/
int major; /* major number of driver */
int first_minor;
int minors; /* maximum number of minors, =1 for
* disks that can't be partitioned. */
+ int ext_minors; /* number of extended dynamic minors */
char disk_name[32]; /* name of major driver */
@@ -167,7 +169,7 @@ static inline struct gendisk *part_to_disk(struct hd_struct *part)
static inline int disk_max_parts(struct gendisk *disk)
{
- return disk->minors - 1;
+ return disk->minors + disk->ext_minors - 1;
}
static inline dev_t disk_devt(struct gendisk *disk)
@@ -554,6 +556,8 @@ struct unixware_disklabel {
#define ADDPART_FLAG_RAID 1
#define ADDPART_FLAG_WHOLEDISK 2
+extern int blk_alloc_devt(struct hd_struct *part, dev_t *devt);
+extern void blk_free_devt(dev_t devt);
extern dev_t blk_lookup_devt(const char *name, int partno);
extern char *disk_name (struct gendisk *hd, int partno, char *buf);
@@ -564,6 +568,9 @@ extern void printk_all_partitions(void);
extern struct gendisk *alloc_disk_node(int minors, int node_id);
extern struct gendisk *alloc_disk(int minors);
+extern struct gendisk *alloc_disk_ext_node(int minors, int ext_minrs,
+ int node_id);
+extern struct gendisk *alloc_disk_ext(int minors, int ext_minors);
extern struct kobject *get_disk(struct gendisk *disk);
extern void put_disk(struct gendisk *disk);
extern void blk_register_region(dev_t devt, unsigned long range,
diff --git a/include/linux/major.h b/include/linux/major.h
index 53d5fafd85c..88249452b93 100644
--- a/include/linux/major.h
+++ b/include/linux/major.h
@@ -170,4 +170,6 @@
#define VIOTAPE_MAJOR 230
+#define BLOCK_EXT_MAJOR 259
+
#endif