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authorTejun Heo <tj@kernel.org>2008-08-25 19:56:16 +0900
committerJens Axboe <jens.axboe@oracle.com>2008-10-09 08:56:08 +0200
commit689d6fac40b41c7bf154f362deaf442548e4dc81 (patch)
tree5989dc5767f657272194ee8c7d69c6db1e62dab7 /include/linux/genhd.h
parent540eed5637b766bb1e881ef744c42617760b4815 (diff)
downloadop-kernel-dev-689d6fac40b41c7bf154f362deaf442548e4dc81.zip
op-kernel-dev-689d6fac40b41c7bf154f362deaf442548e4dc81.tar.gz
block: replace @ext_minors with GENHD_FL_EXT_DEVT
With previous changes, it's meaningless to limit the number of partitions. Replace @ext_minors with GENHD_FL_EXT_DEVT such that setting the flag allows the disk to have maximum number of allowed partitions (only limited by the number of entries in parsed_partitions as determined by MAX_PART constant). This kills not-too-pretty alloc_disk_ext[_node]() functions and makes @minors parameter to alloc_disk[_node]() unnecessary. The parameter is left alone to avoid disturbing the users. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include/linux/genhd.h')
-rw-r--r--include/linux/genhd.h16
1 files changed, 8 insertions, 8 deletions
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index ecf649c..04524c2 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -58,6 +58,8 @@ enum {
UNIXWARE_PARTITION = 0x63, /* Same as GNU_HURD and SCO Unix */
};
+#define DISK_MAX_PARTS 256
+
#include <linux/major.h>
#include <linux/device.h>
#include <linux/smp.h>
@@ -112,6 +114,7 @@ struct hd_struct {
#define GENHD_FL_CD 8
#define GENHD_FL_UP 16
#define GENHD_FL_SUPPRESS_PARTITION_INFO 32
+#define GENHD_FL_EXT_DEVT 64 /* allow extended devt */
#define BLK_SCSI_MAX_CMDS (256)
#define BLK_SCSI_CMD_PER_LONG (BLK_SCSI_MAX_CMDS / (sizeof(long) * 8))
@@ -129,15 +132,13 @@ struct disk_part_tbl {
};
struct gendisk {
- /* major, first_minor, minors and ext_minors are input
- * parameters only, don't use directly. Use disk_devt() and
- * disk_max_parts().
+ /* major, first_minor and 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 */
@@ -180,7 +181,9 @@ 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;
+ if (disk->flags & GENHD_FL_EXT_DEVT)
+ return DISK_MAX_PARTS;
+ return disk->minors;
}
static inline bool disk_partitionable(struct gendisk *disk)
@@ -527,9 +530,6 @@ 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,
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