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-rw-r--r--include/linux/genhd.h11
1 files changed, 9 insertions, 2 deletions
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index e4e18c5..9e866a2 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -127,12 +127,13 @@ struct gendisk {
char disk_name[32]; /* name of major driver */
- /* Array of pointers to partitions indexed by partno - 1.
+ /* Array of pointers to partitions indexed by partno.
* Protected with matching bdev lock but stat and other
* non-critical accesses use RCU. Always access through
* helpers.
*/
struct hd_struct **__part;
+ struct hd_struct part0;
struct block_device_operations *fops;
struct request_queue *queue;
@@ -171,7 +172,12 @@ static inline struct gendisk *part_to_disk(struct hd_struct *part)
static inline int disk_max_parts(struct gendisk *disk)
{
- return disk->minors + disk->ext_minors - 1;
+ return disk->minors + disk->ext_minors;
+}
+
+static inline bool disk_partitionable(struct gendisk *disk)
+{
+ return disk_max_parts(disk) > 1;
}
static inline dev_t disk_devt(struct gendisk *disk)
@@ -197,6 +203,7 @@ static inline void disk_put_part(struct hd_struct *part)
*/
#define DISK_PITER_REVERSE (1 << 0) /* iterate in the reverse direction */
#define DISK_PITER_INCL_EMPTY (1 << 1) /* include 0-sized parts */
+#define DISK_PITER_INCL_PART0 (1 << 2) /* include partition 0 */
struct disk_part_iter {
struct gendisk *disk;