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Message-Id: <20060725132651.1a65169d.zaitcev@redhat.com>
Date: Tue, 25 Jul 2006 13:26:51 -0700
From: Pete Zaitcev <zaitcev@...hat.com>
To: viro@....linux.org.uk
Cc: zaitcev@...hat.com, linux-kernel@...r.kernel.org,
jgarzik@...ox.com, <haeide@...t.uio.no>
Subject: Patch for sparse block minors (RFC)
This is a resend and a bugfix to the original. I added the minor twice
in the md code. Other than that, it's the same thing, only rediffed
to apply to 2.6.18-rc1.
Again, not touching sd. Maybe Jeff wants to push that for libata,
I don't feel up to the task.
The patch is tested to work more or less. Nautilus works, udev works,
fdisk works. Open-close-rmmod stress test seems to pass, though it's
not a guarantee. If anyone sees locking irregularities, please holler.
-- Pete
diff -urp -X dontdiff linux-2.6.18-rc1/arch/um/drivers/ubd_kern.c linux-2.6.18-rc1-lem/arch/um/drivers/ubd_kern.c
--- linux-2.6.18-rc1/arch/um/drivers/ubd_kern.c 2006-07-09 17:53:56.000000000 -0700
+++ linux-2.6.18-rc1-lem/arch/um/drivers/ubd_kern.c 2006-07-09 20:12:02.000000000 -0700
@@ -633,8 +633,7 @@ static int ubd_new_disk(int major, u64 s
if(disk == NULL)
return(-ENOMEM);
- disk->major = major;
- disk->first_minor = unit << UBD_SHIFT;
+ disk->gd_dev = MKDEV(major, unit << UBD_SHIFT);
disk->fops = &ubd_blops;
set_capacity(disk, size / 512);
if(major == MAJOR_NR)
diff -urp -X dontdiff linux-2.6.18-rc1/block/genhd.c linux-2.6.18-rc1-lem/block/genhd.c
--- linux-2.6.18-rc1/block/genhd.c 2006-07-09 17:53:58.000000000 -0700
+++ linux-2.6.18-rc1-lem/block/genhd.c 2006-07-09 20:12:02.000000000 -0700
@@ -181,7 +181,8 @@ static int exact_lock(dev_t dev, void *d
void add_disk(struct gendisk *disk)
{
disk->flags |= GENHD_FL_UP;
- blk_register_region(MKDEV(disk->major, disk->first_minor),
+ if (!(disk->flags & GENHD_FL_SPARSE_MINORS))
+ blk_register_region(disk->gd_dev,
disk->minors, NULL, exact_match, exact_lock, disk);
register_disk(disk);
blk_register_queue(disk);
@@ -193,8 +194,8 @@ EXPORT_SYMBOL(del_gendisk); /* in partit
void unlink_gendisk(struct gendisk *disk)
{
blk_unregister_queue(disk);
- blk_unregister_region(MKDEV(disk->major, disk->first_minor),
- disk->minors);
+ if (!(disk->flags & GENHD_FL_SPARSE_MINORS))
+ blk_unregister_region(disk->gd_dev, disk->minors);
}
#define to_disk(obj) container_of(obj,struct gendisk,kobj)
@@ -257,17 +258,18 @@ static int show_partition(struct seq_fil
/* show the full disk and all non-0 size partitions of it */
seq_printf(part, "%4d %4d %10llu %s\n",
- sgp->major, sgp->first_minor,
+ MAJOR(sgp->gd_dev), MINOR(sgp->gd_dev),
(unsigned long long)get_capacity(sgp) >> 1,
disk_name(sgp, 0, buf));
for (n = 0; n < sgp->minors - 1; n++) {
- if (!sgp->part[n])
+ struct hd_struct *p;
+ if ((p = sgp->part[n]) == NULL)
continue;
- if (sgp->part[n]->nr_sects == 0)
+ if (p->nr_sects == 0)
continue;
seq_printf(part, "%4d %4d %10llu %s\n",
- sgp->major, n + 1 + sgp->first_minor,
- (unsigned long long)sgp->part[n]->nr_sects >> 1 ,
+ MAJOR(p->dev), MINOR(p->dev),
+ (unsigned long long)p->nr_sects >> 1 ,
disk_name(sgp, n + 1, buf));
}
@@ -347,8 +349,7 @@ static ssize_t disk_uevent_store(struct
}
static ssize_t disk_dev_read(struct gendisk * disk, char *page)
{
- dev_t base = MKDEV(disk->major, disk->first_minor);
- return print_dev_t(page, base);
+ return print_dev_t(page, disk->gd_dev);
}
static ssize_t disk_range_read(struct gendisk * disk, char *page)
{
@@ -459,19 +460,19 @@ static int block_uevent(struct kset *kse
if (ktype == &ktype_block) {
disk = container_of(kobj, struct gendisk, kobj);
add_uevent_var(envp, num_envp, &i, buffer, buffer_size,
- &length, "MINOR=%u", disk->first_minor);
+ &length, "MINOR=%u", MINOR(disk->gd_dev));
+ add_uevent_var(envp, num_envp, &i, buffer, buffer_size,
+ &length, "MAJOR=%u", MAJOR(disk->gd_dev));
} else if (ktype == &ktype_part) {
disk = container_of(kobj->parent, struct gendisk, kobj);
part = container_of(kobj, struct hd_struct, kobj);
add_uevent_var(envp, num_envp, &i, buffer, buffer_size,
- &length, "MINOR=%u",
- disk->first_minor + part->partno);
+ &length, "MINOR=%u", MINOR(part->dev));
+ add_uevent_var(envp, num_envp, &i, buffer, buffer_size,
+ &length, "MAJOR=%u", MAJOR(part->dev));
} else
return 0;
- add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
- "MAJOR=%u", disk->major);
-
/* add physical device, backing this device */
physdev = disk->driverfs_dev;
if (physdev) {
@@ -551,7 +552,7 @@ static int diskstats_show(struct seq_fil
{
struct gendisk *gp = v;
char buf[BDEVNAME_SIZE];
- int n = 0;
+ int n;
/*
if (&sgp->kobj.entry == block_subsys.kset.list.next)
@@ -565,7 +566,7 @@ static int diskstats_show(struct seq_fil
disk_round_stats(gp);
preempt_enable();
seq_printf(s, "%4d %4d %s %lu %lu %llu %u %lu %lu %llu %u %u %u %u\n",
- gp->major, n + gp->first_minor, disk_name(gp, n, buf),
+ MAJOR(gp->gd_dev), MINOR(gp->gd_dev), disk_name(gp, 0, buf),
disk_stat_read(gp, ios[0]), disk_stat_read(gp, merges[0]),
(unsigned long long)disk_stat_read(gp, sectors[0]),
jiffies_to_msecs(disk_stat_read(gp, ticks[0])),
@@ -582,7 +583,7 @@ static int diskstats_show(struct seq_fil
if (hd && hd->nr_sects)
seq_printf(s, "%4d %4d %s %u %u %u %u\n",
- gp->major, n + gp->first_minor + 1,
+ MAJOR(hd->dev), MINOR(hd->dev),
disk_name(gp, n + 1, buf),
hd->ios[0], hd->sectors[0],
hd->ios[1], hd->sectors[1]);
@@ -698,7 +699,16 @@ EXPORT_SYMBOL(bdev_read_only);
int invalidate_partition(struct gendisk *disk, int index)
{
int res = 0;
- struct block_device *bdev = bdget_disk(disk, index);
+ struct block_device *bdev;
+
+ if (index == 0)
+ bdev = bdget_disk(disk);
+ else {
+ if (disk->part[index-1])
+ bdev = bdget(disk->part[index-1]->dev);
+ else
+ bdev = NULL;
+ }
if (bdev) {
fsync_bdev(bdev);
res = __invalidate_device(bdev);
diff -urp -X dontdiff linux-2.6.18-rc1/block/ioctl.c linux-2.6.18-rc1-lem/block/ioctl.c
--- linux-2.6.18-rc1/block/ioctl.c 2006-06-21 14:14:17.000000000 -0700
+++ linux-2.6.18-rc1-lem/block/ioctl.c 2006-07-09 20:12:02.000000000 -0700
@@ -69,7 +69,7 @@ static int blkpg_ioctl(struct block_devi
return -ENXIO;
if (disk->part[part - 1]->nr_sects == 0)
return -ENXIO;
- bdevp = bdget_disk(disk, part);
+ bdevp = bdget(disk->part[part-1]->dev);
if (!bdevp)
return -ENOMEM;
mutex_lock(&bdevp->bd_mutex);
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/acorn/block/fd1772.c linux-2.6.18-rc1-lem/drivers/acorn/block/fd1772.c
--- linux-2.6.18-rc1/drivers/acorn/block/fd1772.c 2005-10-28 19:11:34.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/acorn/block/fd1772.c 2006-07-09 20:12:03.000000000 -0700
@@ -1568,8 +1568,7 @@ int fd1772_init(void)
for (i = 0; i < FD_MAX_UNITS; i++) {
unit[i].track = -1;
- disks[i]->major = MAJOR_NR;
- disks[i]->first_minor = 0;
+ disks[i]->gd_dev = MKDEV(MAJOR_NR, 0);
disks[i]->fops = &floppy_fops;
sprintf(disks[i]->disk_name, "fd%d", i);
disks[i]->private_data = &unit[i];
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/acorn/block/mfmhd.c linux-2.6.18-rc1-lem/drivers/acorn/block/mfmhd.c
--- linux-2.6.18-rc1/drivers/acorn/block/mfmhd.c 2006-07-09 17:53:59.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/acorn/block/mfmhd.c 2006-07-09 20:12:03.000000000 -0700
@@ -1269,8 +1269,7 @@ static int mfm_do_init(unsigned char irq
struct gendisk *disk = alloc_disk(64);
if (!disk)
goto Enomem;
- disk->major = MAJOR_NR;
- disk->first_minor = i << 6;
+ disk->gd_dev = MKDEV(MAJOR_NR, i << 6);
disk->fops = &mfm_fops;
sprintf(disk->disk_name, "mfm%c", 'a'+i);
mfm_gendisk[i] = disk;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/acsi.c linux-2.6.18-rc1-lem/drivers/block/acsi.c
--- linux-2.6.18-rc1/drivers/block/acsi.c 2006-07-09 17:54:00.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/acsi.c 2006-07-09 18:32:48.000000000 -0700
@@ -1731,8 +1731,7 @@ int acsi_init( void )
struct gendisk *disk = acsi_gendisk[i];
sprintf(disk->disk_name, "ad%c", 'a'+i);
aip = &acsi_info[NDevices];
- disk->major = ACSI_MAJOR;
- disk->first_minor = i << 4;
+ disk->gd_dev = MKDEV(ACSI_MAJOR, i << 4);
if (acsi_info[i].type != HARDDISK)
disk->minors = 1;
disk->fops = &acsi_fops;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/amiflop.c linux-2.6.18-rc1-lem/drivers/block/amiflop.c
--- linux-2.6.18-rc1/drivers/block/amiflop.c 2006-07-09 17:54:00.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/amiflop.c 2006-07-09 20:12:03.000000000 -0700
@@ -1681,8 +1681,7 @@ static int __init fd_probe_drives(void)
nomem = 1;
}
printk("fd%d ",drive);
- disk->major = FLOPPY_MAJOR;
- disk->first_minor = drive;
+ disk->gd_dev = MKDEV(FLOPPY_MAJOR, drive);
disk->fops = &floppy_fops;
sprintf(disk->disk_name, "fd%d", drive);
disk->private_data = &unit[drive];
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/aoe/aoeblk.c linux-2.6.18-rc1-lem/drivers/block/aoe/aoeblk.c
--- linux-2.6.18-rc1/drivers/block/aoe/aoeblk.c 2006-06-21 14:14:18.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/aoe/aoeblk.c 2006-07-09 20:12:03.000000000 -0700
@@ -224,8 +224,7 @@ aoeblk_gdalloc(void *vp)
spin_lock_irqsave(&d->lock, flags);
blk_queue_make_request(&d->blkq, aoeblk_make_request);
- gd->major = AOE_MAJOR;
- gd->first_minor = d->sysminor * AOE_PARTITIONS;
+ gd->gd_dev = MKDEV(AOE_MAJOR, d->sysminor * AOE_PARTITIONS);
gd->fops = &aoe_bdops;
gd->private_data = d;
gd->capacity = d->ssize;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/aoe/aoecmd.c linux-2.6.18-rc1-lem/drivers/block/aoe/aoecmd.c
--- linux-2.6.18-rc1/drivers/block/aoe/aoecmd.c 2006-06-21 14:14:18.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/aoe/aoecmd.c 2006-07-09 20:12:03.000000000 -0700
@@ -380,7 +380,7 @@ aoecmd_sleepwork(void *vp)
u64 ssize;
ssize = d->gd->capacity;
- bd = bdget_disk(d->gd, 0);
+ bd = bdget_disk(d->gd);
if (bd) {
mutex_lock(&bd->bd_inode->i_mutex);
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/ataflop.c linux-2.6.18-rc1-lem/drivers/block/ataflop.c
--- linux-2.6.18-rc1/drivers/block/ataflop.c 2006-06-21 14:14:18.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/ataflop.c 2006-07-09 20:12:03.000000000 -0700
@@ -1923,8 +1923,7 @@ static int __init atari_floppy_init (voi
for (i = 0; i < FD_MAX_UNITS; i++) {
unit[i].track = -1;
unit[i].flags = 0;
- unit[i].disk->major = FLOPPY_MAJOR;
- unit[i].disk->first_minor = i;
+ unit[i].disk->gd_dev = MKDEV(FLOPPY_MAJOR, i);
sprintf(unit[i].disk->disk_name, "fd%d", i);
unit[i].disk->fops = &floppy_fops;
unit[i].disk->private_data = &unit[i];
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/cciss.c linux-2.6.18-rc1-lem/drivers/block/cciss.c
--- linux-2.6.18-rc1/drivers/block/cciss.c 2006-07-09 17:54:00.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/cciss.c 2006-07-09 18:33:49.000000000 -0700
@@ -3248,8 +3248,7 @@ static int __devinit cciss_init_one(stru
q->queuedata = hba[i];
sprintf(disk->disk_name, "cciss/c%dd%d", i, j);
- disk->major = hba[i]->major;
- disk->first_minor = j << NWD_SHIFT;
+ disk->gd_dev = MKDEV(hba[i]->major, j << NWD_SHIFT);
disk->fops = &cciss_fops;
disk->queue = q;
disk->private_data = drv;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/cpqarray.c linux-2.6.18-rc1-lem/drivers/block/cpqarray.c
--- linux-2.6.18-rc1/drivers/block/cpqarray.c 2006-07-09 17:54:00.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/cpqarray.c 2006-07-09 20:12:03.000000000 -0700
@@ -471,8 +471,7 @@ static int __init cpqarray_register_ctlr
struct gendisk *disk = ida_gendisk[i][j];
drv_info_t *drv = &hba[i]->drv[j];
sprintf(disk->disk_name, "ida/c%dd%d", i, j);
- disk->major = COMPAQ_SMART2_MAJOR + i;
- disk->first_minor = j<<NWD_SHIFT;
+ disk->gd_dev = MKDEV(COMPAQ_SMART2_MAJOR + i, j<<NWD_SHIFT);
disk->fops = &ida_fops;
if (j && !drv->nr_blks)
continue;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/DAC960.c linux-2.6.18-rc1-lem/drivers/block/DAC960.c
--- linux-2.6.18-rc1/drivers/block/DAC960.c 2006-07-09 17:54:00.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/DAC960.c 2006-07-09 18:34:41.000000000 -0700
@@ -2530,8 +2530,7 @@ static boolean DAC960_RegisterBlockDevic
blk_queue_max_sectors(RequestQueue, Controller->MaxBlocksPerCommand);
disk->queue = RequestQueue;
sprintf(disk->disk_name, "rd/c%dd%d", Controller->ControllerNumber, n);
- disk->major = MajorNumber;
- disk->first_minor = n << DAC960_MaxPartitionsBits;
+ disk->gd_dev = MKDEV(MajorNumber, n << DAC960_MaxPartitionsBits);
disk->fops = &DAC960_BlockDeviceOperations;
}
/*
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/floppy.c linux-2.6.18-rc1-lem/drivers/block/floppy.c
--- linux-2.6.18-rc1/drivers/block/floppy.c 2006-07-09 17:54:00.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/floppy.c 2006-07-09 20:12:03.000000000 -0700
@@ -4186,8 +4186,7 @@ static int __init floppy_init(void)
goto out_put_disk;
}
- disks[dr]->major = FLOPPY_MAJOR;
- disks[dr]->first_minor = TOMINOR(dr);
+ disks[dr]->gd_dev = MKDEV(FLOPPY_MAJOR, TOMINOR(dr));
disks[dr]->fops = &floppy_fops;
sprintf(disks[dr]->disk_name, "fd%d", dr);
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/loop.c linux-2.6.18-rc1-lem/drivers/block/loop.c
--- linux-2.6.18-rc1/drivers/block/loop.c 2006-07-09 17:54:00.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/loop.c 2006-07-09 18:35:47.000000000 -0700
@@ -1288,8 +1288,7 @@ static int __init loop_init(void)
init_completion(&lo->lo_bh_done);
lo->lo_number = i;
spin_lock_init(&lo->lo_lock);
- disk->major = LOOP_MAJOR;
- disk->first_minor = i;
+ disk->gd_dev = MKDEV(LOOP_MAJOR, i);
disk->fops = &lo_fops;
sprintf(disk->disk_name, "loop%d", i);
disk->private_data = lo;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/nbd.c linux-2.6.18-rc1-lem/drivers/block/nbd.c
--- linux-2.6.18-rc1/drivers/block/nbd.c 2006-07-09 17:54:00.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/nbd.c 2006-07-09 20:12:03.000000000 -0700
@@ -651,8 +651,7 @@ static int __init nbd_init(void)
init_waitqueue_head(&nbd_dev[i].active_wq);
nbd_dev[i].blksize = 1024;
nbd_dev[i].bytesize = 0x7ffffc00ULL << 10; /* 2TB */
- disk->major = NBD_MAJOR;
- disk->first_minor = i;
+ disk->gd_dev = MKDEV(NBD_MAJOR, i);
disk->fops = &nbd_fops;
disk->private_data = &nbd_dev[i];
disk->flags |= GENHD_FL_SUPPRESS_PARTITION_INFO;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/paride/pcd.c linux-2.6.18-rc1-lem/drivers/block/paride/pcd.c
--- linux-2.6.18-rc1/drivers/block/paride/pcd.c 2005-10-28 19:11:38.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/paride/pcd.c 2006-07-09 20:12:03.000000000 -0700
@@ -299,8 +299,7 @@ static void pcd_init_units(void)
cd->info.speed = 0;
cd->info.capacity = 1;
cd->info.mask = 0;
- disk->major = major;
- disk->first_minor = unit;
+ disk->gd_dev = MKDEV(major, unit);
strcpy(disk->disk_name, cd->name); /* umm... */
disk->fops = &pcd_bdops;
}
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/paride/pd.c linux-2.6.18-rc1-lem/drivers/block/paride/pd.c
--- linux-2.6.18-rc1/drivers/block/paride/pd.c 2006-06-21 14:14:18.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/paride/pd.c 2006-07-09 20:12:03.000000000 -0700
@@ -831,8 +831,7 @@ static void pd_probe_drive(struct pd_uni
return;
strcpy(p->disk_name, disk->name);
p->fops = &pd_fops;
- p->major = major;
- p->first_minor = (disk - pd) << PD_BITS;
+ p->gd_dev = MKDEV(major, (disk - pd) << PD_BITS);
disk->gd = p;
p->private_data = disk;
p->queue = pd_queue;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/paride/pf.c linux-2.6.18-rc1-lem/drivers/block/paride/pf.c
--- linux-2.6.18-rc1/drivers/block/paride/pf.c 2006-07-09 17:54:00.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/paride/pf.c 2006-07-09 20:12:03.000000000 -0700
@@ -287,8 +287,7 @@ static void __init pf_init_units(void)
pf->drive = (*drives[unit])[D_SLV];
pf->lun = (*drives[unit])[D_LUN];
snprintf(pf->name, PF_NAMELEN, "%s%d", name, unit);
- disk->major = major;
- disk->first_minor = unit;
+ disk->gd_dev = MKDEV(major, unit);
strcpy(disk->disk_name, pf->name);
disk->fops = &pf_fops;
if (!(*drives[unit])[D_PRT])
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/pktcdvd.c linux-2.6.18-rc1-lem/drivers/block/pktcdvd.c
--- linux-2.6.18-rc1/drivers/block/pktcdvd.c 2006-07-09 17:54:00.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/pktcdvd.c 2006-07-10 19:17:00.000000000 -0700
@@ -2474,8 +2474,7 @@ static int pkt_setup_dev(struct pkt_ctrl
init_waitqueue_head(&pd->wqueue);
pd->bio_queue = RB_ROOT;
- disk->major = pkt_major;
- disk->first_minor = idx;
+ disk->gd_dev = MKDEV(pkt_major, idx);
disk->fops = &pktcdvd_ops;
disk->flags = GENHD_FL_REMOVABLE;
sprintf(disk->disk_name, "pktcdvd%d", idx);
@@ -2484,7 +2483,7 @@ static int pkt_setup_dev(struct pkt_ctrl
if (!disk->queue)
goto out_mem2;
- pd->pkt_dev = MKDEV(disk->major, disk->first_minor);
+ pd->pkt_dev = disk->gd_dev;
ret = pkt_new_dev(pd, dev);
if (ret)
goto out_new_dev;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/ps2esdi.c linux-2.6.18-rc1-lem/drivers/block/ps2esdi.c
--- linux-2.6.18-rc1/drivers/block/ps2esdi.c 2006-07-09 17:54:01.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/ps2esdi.c 2006-07-09 18:36:36.000000000 -0700
@@ -417,8 +417,7 @@ static int __init ps2esdi_geninit(void)
struct gendisk *disk = alloc_disk(64);
if (!disk)
goto err_out4;
- disk->major = PS2ESDI_MAJOR;
- disk->first_minor = i<<6;
+ disk->gd_dev = MKDEV(PS2ESDI_MAJOR, i<<6);
sprintf(disk->disk_name, "ed%c", 'a'+i);
disk->fops = &ps2esdi_fops;
ps2esdi_gendisk[i] = disk;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/rd.c linux-2.6.18-rc1-lem/drivers/block/rd.c
--- linux-2.6.18-rc1/drivers/block/rd.c 2006-07-09 17:54:01.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/rd.c 2006-07-09 20:12:03.000000000 -0700
@@ -450,8 +450,7 @@ static int __init rd_init(void)
blk_queue_hardsect_size(rd_queue[i], rd_blocksize);
/* rd_size is given in kB */
- disk->major = RAMDISK_MAJOR;
- disk->first_minor = i;
+ disk->gd_dev = MKDEV(RAMDISK_MAJOR, i);
disk->fops = &rd_bd_op;
disk->queue = rd_queue[i];
disk->flags |= GENHD_FL_SUPPRESS_PARTITION_INFO;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/swim3.c linux-2.6.18-rc1-lem/drivers/block/swim3.c
--- linux-2.6.18-rc1/drivers/block/swim3.c 2006-07-09 17:54:01.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/swim3.c 2006-07-09 20:41:48.000000000 -0700
@@ -1141,8 +1141,7 @@ static int __devinit swim3_attach(struct
if (disk == NULL)
return 0;
- disk->major = FLOPPY_MAJOR;
- disk->first_minor = i;
+ disk->gd_dev = MKDEV(FLOPPY_MAJOR, i);
disk->fops = &floppy_fops;
disk->private_data = &floppy_states[i];
disk->queue = swim3_queue;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/swim_iop.c linux-2.6.18-rc1-lem/drivers/block/swim_iop.c
--- linux-2.6.18-rc1/drivers/block/swim_iop.c 2005-10-28 19:11:38.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/swim_iop.c 2006-07-09 20:12:03.000000000 -0700
@@ -193,8 +193,7 @@ int swimiop_init(void)
struct gendisk *disk = alloc_disk(1);
if (!disk)
continue;
- disk->major = FLOPPY_MAJOR;
- disk->first_minor = i;
+ disk->gd_dev = MKDEV(FLOPPY_MAJOR, i);
disk->fops = &floppy_fops;
sprintf(disk->disk_name, "fd%d", i);
disk->private_data = &floppy_states[i];
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/sx8.c linux-2.6.18-rc1-lem/drivers/block/sx8.c
--- linux-2.6.18-rc1/drivers/block/sx8.c 2006-07-09 17:54:01.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/sx8.c 2006-07-09 18:39:21.000000000 -0700
@@ -1509,8 +1509,7 @@ static int carm_init_disks(struct carm_h
port->disk = disk;
sprintf(disk->disk_name, DRV_NAME "/%u",
(unsigned int) (host->id * CARM_MAX_PORTS) + i);
- disk->major = host->major;
- disk->first_minor = i * CARM_MINORS_PER_MAJOR;
+ disk->gd_dev = MKDEV(host->major, i * CARM_MINORS_PER_MAJOR);
disk->fops = &carm_bd_ops;
disk->private_data = port;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/ub.c linux-2.6.18-rc1-lem/drivers/block/ub.c
--- linux-2.6.18-rc1/drivers/block/ub.c 2006-07-09 17:54:01.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/ub.c 2006-07-10 18:39:34.000000000 -0700
@@ -105,9 +105,18 @@
#define UB_MAX_LUNS 9
/*
- */
+ * The minor layout is:
+ * 19 - 11 0xFF800
+ * 10 - 8 0x700 Upper 3 bits of partition number
+ * 7 - 3 0xF8 Host index, or same as "id". UB_MAX_HOSTS fit here.
+ * 2 - 0 0x7 Lower 3 bits of partition number
+ */
+#define UB_PARTS_PER_LUN 64
+#define UB_PARTS_LOW 8
+#define UB_MINORS 2048
-#define UB_PARTS_PER_LUN 8
+/*
+ */
#define UB_MAX_CDB_SIZE 16 /* Corresponds to Bulk */
@@ -377,6 +387,7 @@ static int ub_submit_clear_stall(struct
static void ub_top_sense_done(struct ub_dev *sc, struct ub_scsi_cmd *scmd);
static void ub_reset_enter(struct ub_dev *sc, int try);
static void ub_reset_task(void *arg);
+static dev_t ub_bd_map(struct gendisk *disk, int partno);
static int ub_sync_tur(struct ub_dev *sc, struct ub_lun *lun);
static int ub_sync_read_cap(struct ub_dev *sc, struct ub_lun *lun,
struct ub_capacity *ret);
@@ -400,14 +411,10 @@ MODULE_DEVICE_TABLE(usb, ub_usb_ids);
#endif /* CONFIG_USB_LIBUSUAL */
/*
- * Find me a way to identify "next free minor" for add_disk(),
- * and the array disappears the next day. However, the number of
- * hosts has something to do with the naming and /proc/partitions.
- * This has to be thought out in detail before changing.
- * If UB_MAX_HOST was 1000, we'd use a bitmap. Or a better data structure.
+ * If UB_MAX_HOST were 1000, we'd use a better data structure.
*/
#define UB_MAX_HOSTS 26
-static char ub_hostv[UB_MAX_HOSTS];
+static struct ub_lun *ub_hostv[UB_MAX_HOSTS];
#define UB_QLOCK_NUM 5
static spinlock_t ub_qlockv[UB_QLOCK_NUM];
@@ -427,8 +434,8 @@ static int ub_id_get(void)
spin_lock_irqsave(&ub_lock, flags);
for (i = 0; i < UB_MAX_HOSTS; i++) {
- if (ub_hostv[i] == 0) {
- ub_hostv[i] = 1;
+ if (ub_hostv[i] == NULL) {
+ ub_hostv[i] = (struct ub_lun *) 1;
spin_unlock_irqrestore(&ub_lock, flags);
return i;
}
@@ -437,6 +444,15 @@ static int ub_id_get(void)
return -1;
}
+static void ub_id_commit(int id, struct ub_lun *lun)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&ub_lock, flags);
+ ub_hostv[id] = lun;
+ spin_unlock_irqrestore(&ub_lock, flags);
+}
+
static void ub_id_put(int id)
{
unsigned long flags;
@@ -447,12 +463,12 @@ static void ub_id_put(int id)
}
spin_lock_irqsave(&ub_lock, flags);
- if (ub_hostv[id] == 0) {
+ if (ub_hostv[id] == NULL) {
spin_unlock_irqrestore(&ub_lock, flags);
printk(KERN_ERR DRV_NAME ": freeing free host ID %d\n", id);
return;
}
- ub_hostv[id] = 0;
+ ub_hostv[id] = NULL;
spin_unlock_irqrestore(&ub_lock, flags);
}
@@ -1768,9 +1787,97 @@ static struct block_device_operations ub
.ioctl = ub_bd_ioctl,
.media_changed = ub_bd_media_changed,
.revalidate_disk = ub_bd_revalidate,
+ .partmap = ub_bd_map,
};
/*
+ * Since we want to remap minor bits, we have to use this weird API.
+ * It consists of two entries: ->lock and ->get. The ->lock is called first
+ * and grabs the relevant gendisk, plus everything there is to grab
+ * so that ->get works. The ->get (often called "match") remaps minor
+ * bits into an index for the array of partitions.
+ *
+ * If ->get fails, it has to undo everything ->lock has done.
+ * Also, if that happens, the whole set is called again, so we better
+ * make ->lock to fail too.
+ */
+
+static int ub_blk_lock(dev_t dev, void *data)
+{
+ unsigned int minor = MINOR(dev);
+ unsigned int host;
+ struct ub_dev *sc;
+ struct ub_lun *lun;
+ unsigned long flags;
+
+ host = (minor >> 3) & 0x1f;
+ if (host >= UB_MAX_HOSTS)
+ return -1;
+
+ spin_lock_irqsave(&ub_lock, flags);
+ lun = ub_hostv[host];
+ if (lun == NULL || (unsigned long)lun == 1) {
+ spin_unlock_irqrestore(&ub_lock, flags);
+ return -1;
+ }
+ sc = lun->udev;
+ if (atomic_read(&sc->poison)) {
+ spin_unlock_irqrestore(&ub_lock, flags);
+ return -1;
+ }
+ sc->openc++;
+ spin_unlock_irqrestore(&ub_lock, flags);
+
+ if (!get_disk(lun->disk)) {
+ ub_put(sc);
+ return -1;
+ }
+
+ return 0;
+}
+
+static struct kobject *ub_blk_match(dev_t dev, int *part, void *data)
+{
+ unsigned int minor = MINOR(dev);
+ struct ub_dev *sc;
+ struct ub_lun *lun;
+ struct kobject *kobj;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ub_lock, flags);
+ lun = ub_hostv[(minor >> 3) & 0x1f];
+ if (lun == NULL || (unsigned long)lun == 1) { /* This cannot happen */
+ spin_unlock_irqrestore(&ub_lock, flags);
+ printk(KERN_ERR DRV_NAME ": NULL lun for %u:%u\n",
+ (unsigned int) MAJOR(dev), minor);
+ return NULL;
+ }
+ sc = lun->udev;
+ if (atomic_read(&sc->poison)) { /* This can happen */
+ spin_unlock_irqrestore(&ub_lock, flags);
+ /* Undo results of ub_blk_lock() */
+ put_disk(lun->disk);
+ ub_put(sc);
+ return NULL;
+ }
+ spin_unlock_irqrestore(&ub_lock, flags);
+
+ *part = ((minor & 0x700) >> 5) | (minor & 0x7);
+ kobj = &lun->disk->kobj;
+ ub_put(sc);
+ return kobj;
+}
+
+static dev_t ub_bd_map(struct gendisk *disk, int partno)
+{
+ struct ub_lun *lun = disk->private_data;
+ unsigned int minor;
+
+ minor = ((partno & 0x38) << 5) | (lun->id << 3) | (partno & 0x7);
+ return MKDEV(UB_MAJOR, minor);
+}
+
+/*
* Common ->done routine for commands executed synchronously.
*/
static void ub_probe_done(struct ub_dev *sc, struct ub_scsi_cmd *cmd)
@@ -2289,11 +2399,11 @@ static int ub_probe_lun(struct ub_dev *s
goto err_diskalloc;
sprintf(disk->disk_name, DRV_NAME "%c", lun->id + 'a');
- disk->major = UB_MAJOR;
- disk->first_minor = lun->id * UB_PARTS_PER_LUN;
+ disk->gd_dev = MKDEV(UB_MAJOR, lun->id * UB_PARTS_LOW);
disk->fops = &ub_bd_fops;
disk->private_data = lun;
disk->driverfs_dev = &sc->intf->dev;
+ disk->flags |= GENHD_FL_SPARSE_MINORS;
rc = -ENOMEM;
if ((q = blk_init_queue(ub_request_fn, sc->lock)) == NULL)
@@ -2316,6 +2426,7 @@ static int ub_probe_lun(struct ub_dev *s
if (lun->removable)
disk->flags |= GENHD_FL_REMOVABLE;
+ ub_id_commit(lun->id, lun);
add_disk(disk);
return 0;
@@ -2440,6 +2551,8 @@ static int __init ub_init(void)
for (i = 0; i < UB_QLOCK_NUM; i++)
spin_lock_init(&ub_qlockv[i]);
+ blk_register_region(MKDEV(UB_MAJOR, 0), UB_MINORS, THIS_MODULE,
+ ub_blk_match, ub_blk_lock, NULL);
if ((rc = register_blkdev(UB_MAJOR, DRV_NAME)) != 0)
goto err_regblkdev;
@@ -2452,6 +2565,7 @@ static int __init ub_init(void)
err_register:
unregister_blkdev(UB_MAJOR, DRV_NAME);
err_regblkdev:
+ blk_unregister_region(MKDEV(UB_MAJOR, 0), UB_MINORS);
return rc;
}
@@ -2461,6 +2575,7 @@ static void __exit ub_exit(void)
unregister_blkdev(UB_MAJOR, DRV_NAME);
usb_usual_clear_present(USB_US_TYPE_UB);
+ blk_unregister_region(MKDEV(UB_MAJOR, 0), UB_MINORS);
}
module_init(ub_init);
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/umem.c linux-2.6.18-rc1-lem/drivers/block/umem.c
--- linux-2.6.18-rc1/drivers/block/umem.c 2006-07-09 17:54:01.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/umem.c 2006-07-09 18:40:07.000000000 -0700
@@ -1192,8 +1192,7 @@ static int __init mm_init(void)
struct gendisk *disk = mm_gendisk[i];
sprintf(disk->disk_name, "umem%c", 'a'+i);
spin_lock_init(&cards[i].lock);
- disk->major = major_nr;
- disk->first_minor = i << MM_SHIFT;
+ disk->gd_dev = MKDEV(major_nr, i << MM_SHIFT);
disk->fops = &mm_fops;
disk->private_data = &cards[i];
disk->queue = cards[i].queue;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/viodasd.c linux-2.6.18-rc1-lem/drivers/block/viodasd.c
--- linux-2.6.18-rc1/drivers/block/viodasd.c 2006-07-09 17:54:01.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/viodasd.c 2006-07-09 20:12:03.000000000 -0700
@@ -513,8 +513,7 @@ retry:
blk_queue_max_hw_segments(q, VIOMAXBLOCKDMA);
blk_queue_max_phys_segments(q, VIOMAXBLOCKDMA);
blk_queue_max_sectors(q, VIODASD_MAXSECTORS);
- g->major = VIODASD_MAJOR;
- g->first_minor = dev_no << PARTITION_SHIFT;
+ g->gd_dev = MKDEV(VIODASD_MAJOR, dev_no << PARTITION_SHIFT);
if (dev_no >= 26)
snprintf(g->disk_name, sizeof(g->disk_name),
VIOD_GENHD_NAME "%c%c",
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/xd.c linux-2.6.18-rc1-lem/drivers/block/xd.c
--- linux-2.6.18-rc1/drivers/block/xd.c 2006-07-09 17:54:01.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/xd.c 2006-07-09 18:40:57.000000000 -0700
@@ -212,8 +212,7 @@ static int __init xd_init(void)
if (!disk)
goto Enomem;
p->unit = i;
- disk->major = XT_DISK_MAJOR;
- disk->first_minor = i<<6;
+ disk->gd_dev = MKDEV(XT_DISK_MAJOR, i<<6);
sprintf(disk->disk_name, "xd%c", i+'a');
disk->fops = &xd_fops;
disk->private_data = p;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/block/z2ram.c linux-2.6.18-rc1-lem/drivers/block/z2ram.c
--- linux-2.6.18-rc1/drivers/block/z2ram.c 2006-07-09 17:54:01.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/block/z2ram.c 2006-07-09 18:42:10.000000000 -0700
@@ -350,8 +350,7 @@ z2_init(void)
if (!z2_queue)
goto out_queue;
- z2ram_gendisk->major = Z2RAM_MAJOR;
- z2ram_gendisk->first_minor = 0;
+ z2ram_gendisk->gd_dev = MKDEV(Z2RAM_MAJOR, 0);
z2ram_gendisk->fops = &z2_fops;
sprintf(z2ram_gendisk->disk_name, "z2ram");
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/cdrom/aztcd.c linux-2.6.18-rc1-lem/drivers/cdrom/aztcd.c
--- linux-2.6.18-rc1/drivers/cdrom/aztcd.c 2006-07-09 17:54:01.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/cdrom/aztcd.c 2006-07-09 18:43:02.000000000 -0700
@@ -1914,8 +1914,7 @@ static int __init aztcd_init(void)
}
blk_queue_hardsect_size(azt_queue, 2048);
- azt_disk->major = MAJOR_NR;
- azt_disk->first_minor = 0;
+ azt_disk->gd_dev = MKDEV(MAJOR_NR, 0);
azt_disk->fops = &azt_fops;
sprintf(azt_disk->disk_name, "aztcd");
azt_disk->queue = azt_queue;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/cdrom/cdu31a.c linux-2.6.18-rc1-lem/drivers/cdrom/cdu31a.c
--- linux-2.6.18-rc1/drivers/cdrom/cdu31a.c 2006-07-09 17:54:01.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/cdrom/cdu31a.c 2006-07-09 20:12:03.000000000 -0700
@@ -3122,8 +3122,7 @@ int __init cdu31a_init(void)
disk = alloc_disk(1);
if (!disk)
goto errout1;
- disk->major = MAJOR_NR;
- disk->first_minor = 0;
+ disk->gd_dev = MKDEV(MAJOR_NR, 0);
sprintf(disk->disk_name, "cdu31a");
disk->fops = &scd_bdops;
disk->flags = GENHD_FL_CD;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/cdrom/cm206.c linux-2.6.18-rc1-lem/drivers/cdrom/cm206.c
--- linux-2.6.18-rc1/drivers/cdrom/cm206.c 2006-07-09 17:54:01.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/cdrom/cm206.c 2006-07-09 20:12:03.000000000 -0700
@@ -1470,8 +1470,7 @@ int __init cm206_init(void)
disk = alloc_disk(1);
if (!disk)
goto out_disk;
- disk->major = MAJOR_NR;
- disk->first_minor = 0;
+ disk->gd_dev = MKDEV(MAJOR_NR, 0);
sprintf(disk->disk_name, "cm206cd");
disk->fops = &cm206_bdops;
disk->flags = GENHD_FL_CD;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/cdrom/gscd.c linux-2.6.18-rc1-lem/drivers/cdrom/gscd.c
--- linux-2.6.18-rc1/drivers/cdrom/gscd.c 2006-07-09 17:54:01.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/cdrom/gscd.c 2006-07-09 18:43:44.000000000 -0700
@@ -951,8 +951,7 @@ static int __init gscd_init(void)
gscd_disk = alloc_disk(1);
if (!gscd_disk)
goto err_out1;
- gscd_disk->major = MAJOR_NR;
- gscd_disk->first_minor = 0;
+ gscd_disk->gd_dev = MKDEV(MAJOR_NR, 0);
gscd_disk->fops = &gscd_fops;
sprintf(gscd_disk->disk_name, "gscd");
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/cdrom/mcdx.c linux-2.6.18-rc1-lem/drivers/cdrom/mcdx.c
--- linux-2.6.18-rc1/drivers/cdrom/mcdx.c 2006-07-09 17:54:01.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/cdrom/mcdx.c 2006-07-09 20:12:03.000000000 -0700
@@ -1226,8 +1226,7 @@ static int __init mcdx_init_drive(int dr
stuffp->info.capacity = 1;
stuffp->info.handle = stuffp;
sprintf(stuffp->info.name, "mcdx%d", drive);
- disk->major = MAJOR_NR;
- disk->first_minor = drive;
+ disk->gd_dev = MKDEV(MAJOR_NR, drive);
strcpy(disk->disk_name, stuffp->info.name);
disk->fops = &mcdx_bdops;
disk->flags = GENHD_FL_CD;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/cdrom/optcd.c linux-2.6.18-rc1-lem/drivers/cdrom/optcd.c
--- linux-2.6.18-rc1/drivers/cdrom/optcd.c 2006-07-09 17:54:01.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/cdrom/optcd.c 2006-07-09 18:44:28.000000000 -0700
@@ -2029,8 +2029,7 @@ static int __init optcd_init(void)
printk(KERN_ERR "optcd: can't allocate disk\n");
return -ENOMEM;
}
- optcd_disk->major = MAJOR_NR;
- optcd_disk->first_minor = 0;
+ optcd_disk->gd_dev = MKDEV(MAJOR_NR, 0);
optcd_disk->fops = &opt_fops;
sprintf(optcd_disk->disk_name, "optcd");
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/cdrom/sbpcd.c linux-2.6.18-rc1-lem/drivers/cdrom/sbpcd.c
--- linux-2.6.18-rc1/drivers/cdrom/sbpcd.c 2006-07-09 17:54:01.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/cdrom/sbpcd.c 2006-07-09 20:12:03.000000000 -0700
@@ -5862,8 +5862,7 @@ int __init sbpcd_init(void)
sbpcd_infop->handle = p;
p->sbpcd_infop = sbpcd_infop;
disk = alloc_disk(1);
- disk->major = MAJOR_NR;
- disk->first_minor = j;
+ disk->gd_dev = MKDEV(MAJOR_NR, j);
disk->fops = &sbpcd_bdops;
strcpy(disk->disk_name, sbpcd_infop->name);
disk->flags = GENHD_FL_CD;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/cdrom/sjcd.c linux-2.6.18-rc1-lem/drivers/cdrom/sjcd.c
--- linux-2.6.18-rc1/drivers/cdrom/sjcd.c 2006-07-09 17:54:01.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/cdrom/sjcd.c 2006-07-09 18:45:12.000000000 -0700
@@ -1691,8 +1691,7 @@ static int __init sjcd_init(void)
printk(KERN_ERR "SJCD: can't allocate disk");
goto out1;
}
- sjcd_disk->major = MAJOR_NR,
- sjcd_disk->first_minor = 0,
+ sjcd_disk->gd_dev = MKDEV(MAJOR_NR, 0);
sjcd_disk->fops = &sjcd_fops,
sprintf(sjcd_disk->disk_name, "sjcd");
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/cdrom/sonycd535.c linux-2.6.18-rc1-lem/drivers/cdrom/sonycd535.c
--- linux-2.6.18-rc1/drivers/cdrom/sonycd535.c 2006-07-09 17:54:01.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/cdrom/sonycd535.c 2006-07-09 18:45:49.000000000 -0700
@@ -1585,8 +1585,7 @@ static int __init sony535_init(void)
cdu_disk = alloc_disk(1);
if (!cdu_disk)
goto out6;
- cdu_disk->major = MAJOR_NR;
- cdu_disk->first_minor = 0;
+ cdu_disk->gd_dev = MKDEV(MAJOR_NR, 0);
cdu_disk->fops = &cdu_fops;
sprintf(cdu_disk->disk_name, "cdu");
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/cdrom/viocd.c linux-2.6.18-rc1-lem/drivers/cdrom/viocd.c
--- linux-2.6.18-rc1/drivers/cdrom/viocd.c 2006-07-09 17:54:01.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/cdrom/viocd.c 2006-07-09 20:12:03.000000000 -0700
@@ -683,8 +683,7 @@ static int viocd_probe(struct vio_dev *v
c->name);
goto out_cleanup_queue;
}
- gendisk->major = VIOCD_MAJOR;
- gendisk->first_minor = deviceno;
+ gendisk->gd_dev = MKDEV(VIOCD_MAJOR, deviceno);
strncpy(gendisk->disk_name, c->name,
sizeof(gendisk->disk_name));
blk_queue_max_hw_segments(q, 1);
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/char/random.c linux-2.6.18-rc1-lem/drivers/char/random.c
--- linux-2.6.18-rc1/drivers/char/random.c 2006-07-09 17:54:04.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/char/random.c 2006-07-09 20:12:03.000000000 -0700
@@ -660,10 +660,9 @@ void add_disk_randomness(struct gendisk
if (!disk || !disk->random)
return;
/* first major is 1, so we get >= 0x200 here */
- DEBUG_ENT("disk event %d:%d\n", disk->major, disk->first_minor);
+ DEBUG_ENT("disk event %d:%d\n",MAJOR(disk->gd_dev),MINOR(disk->gd_dev));
- add_timer_randomness(disk->random,
- 0x100 + MKDEV(disk->major, disk->first_minor));
+ add_timer_randomness(disk->random, 0x100 + disk->gd_dev);
}
EXPORT_SYMBOL(add_disk_randomness);
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/ide/ide-probe.c linux-2.6.18-rc1-lem/drivers/ide/ide-probe.c
--- linux-2.6.18-rc1/drivers/ide/ide-probe.c 2006-07-09 17:54:06.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/ide/ide-probe.c 2006-07-09 20:12:03.000000000 -0700
@@ -1222,7 +1222,7 @@ static int exact_lock(dev_t dev, void *d
void ide_register_region(struct gendisk *disk)
{
- blk_register_region(MKDEV(disk->major, disk->first_minor),
+ blk_register_region(disk->gd_dev,
disk->minors, NULL, exact_match, exact_lock, disk);
}
@@ -1230,8 +1230,7 @@ EXPORT_SYMBOL_GPL(ide_register_region);
void ide_unregister_region(struct gendisk *disk)
{
- blk_unregister_region(MKDEV(disk->major, disk->first_minor),
- disk->minors);
+ blk_unregister_region(disk->gd_dev, disk->minors);
}
EXPORT_SYMBOL_GPL(ide_unregister_region);
@@ -1241,8 +1240,7 @@ void ide_init_disk(struct gendisk *disk,
ide_hwif_t *hwif = drive->hwif;
unsigned int unit = (drive->select.all >> 4) & 1;
- disk->major = hwif->major;
- disk->first_minor = unit << PARTN_BITS;
+ disk->gd_dev = MKDEV(hwif->major, unit << PARTN_BITS);
sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit);
disk->queue = drive->queue;
}
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/ide/legacy/hd.c linux-2.6.18-rc1-lem/drivers/ide/legacy/hd.c
--- linux-2.6.18-rc1/drivers/ide/legacy/hd.c 2006-07-09 17:54:06.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/ide/legacy/hd.c 2006-07-09 20:12:03.000000000 -0700
@@ -792,8 +792,7 @@ static int __init hd_init(void)
struct hd_i_struct *p = &hd_info[drive];
if (!disk)
goto Enomem;
- disk->major = MAJOR_NR;
- disk->first_minor = drive << 6;
+ disk->gd_dev = MKDEV(MAJOR_NR, drive << 6);
disk->fops = &hd_fops;
sprintf(disk->disk_name, "hd%c", 'a'+drive);
disk->private_data = p;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/md/dm.c linux-2.6.18-rc1-lem/drivers/md/dm.c
--- linux-2.6.18-rc1/drivers/md/dm.c 2006-07-09 17:54:10.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/md/dm.c 2006-07-09 20:39:54.000000000 -0700
@@ -929,8 +929,7 @@ static struct mapped_device *alloc_dev(i
init_waitqueue_head(&md->wait);
init_waitqueue_head(&md->eventq);
- md->disk->major = _major;
- md->disk->first_minor = minor;
+ md->disk->gd_dev = MKDEV(_major, minor);
md->disk->fops = &dm_blk_dops;
md->disk->queue = md->queue;
md->disk->private_data = md;
@@ -963,7 +962,7 @@ static struct mapped_device *alloc_dev(i
static void free_dev(struct mapped_device *md)
{
- int minor = md->disk->first_minor;
+ int minor = MINOR(md->disk->gd_dev);
if (md->suspended_bdev) {
thaw_bdev(md->suspended_bdev, NULL);
@@ -1073,7 +1072,7 @@ static struct mapped_device *dm_find_md(
md = idr_find(&_minor_idr, minor);
if (md && (md == MINOR_ALLOCED ||
- (dm_disk(md)->first_minor != minor) ||
+ MINOR(dm_disk(md)->gd_dev) != minor ||
test_bit(DMF_FREEING, &md->flags))) {
md = NULL;
goto out;
@@ -1124,7 +1123,7 @@ void dm_put(struct mapped_device *md)
if (atomic_dec_and_lock(&md->holders, &_minor_lock)) {
map = dm_get_table(md);
- idr_replace(&_minor_idr, MINOR_ALLOCED, dm_disk(md)->first_minor);
+ idr_replace(&_minor_idr, MINOR_ALLOCED, MINOR(dm_disk(md)->gd_dev));
set_bit(DMF_FREEING, &md->flags);
spin_unlock(&_minor_lock);
if (!dm_suspended(md)) {
@@ -1232,7 +1231,7 @@ int dm_suspend(struct mapped_device *md,
/* This does not get reverted if there's an error later. */
dm_table_presuspend_targets(map);
- md->suspended_bdev = bdget_disk(md->disk, 0);
+ md->suspended_bdev = bdget_disk(md->disk);
if (!md->suspended_bdev) {
DMWARN("bdget failed in dm_suspend");
r = -ENOMEM;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/md/dm-ioctl.c linux-2.6.18-rc1-lem/drivers/md/dm-ioctl.c
--- linux-2.6.18-rc1/drivers/md/dm-ioctl.c 2006-07-09 17:54:10.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/md/dm-ioctl.c 2006-07-09 20:40:27.000000000 -0700
@@ -423,7 +423,7 @@ static int list_devices(struct dm_ioctl
old_nl->next = (uint32_t) ((void *) nl -
(void *) old_nl);
disk = dm_disk(hc->md);
- nl->dev = huge_encode_dev(MKDEV(disk->major, disk->first_minor));
+ nl->dev = huge_encode_dev(disk->gd_dev);
nl->next = 0;
strcpy(nl->name, hc->name);
@@ -536,7 +536,7 @@ static int __dev_status(struct mapped_de
if (dm_suspended(md))
param->flags |= DM_SUSPEND_FLAG;
- param->dev = huge_encode_dev(MKDEV(disk->major, disk->first_minor));
+ param->dev = huge_encode_dev(disk->gd_dev);
/*
* Yes, this will be out of date by the time it gets back
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/md/md.c linux-2.6.18-rc1-lem/drivers/md/md.c
--- linux-2.6.18-rc1/drivers/md/md.c 2006-07-09 17:54:11.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/md/md.c 2006-07-09 20:12:03.000000000 -0700
@@ -2907,8 +2907,7 @@ static struct kobject *md_probe(dev_t de
mddev_put(mddev);
return NULL;
}
- disk->major = MAJOR(dev);
- disk->first_minor = unit << shift;
+ disk->gd_dev = dev;
if (partitioned)
sprintf(disk->disk_name, "md_d%d", unit);
else
@@ -4054,7 +4053,7 @@ static int update_size(mddev_t *mddev, u
if (!rv) {
struct block_device *bdev;
- bdev = bdget_disk(mddev->gendisk, 0);
+ bdev = bdget_disk(mddev->gendisk);
if (bdev) {
mutex_lock(&bdev->bd_inode->i_mutex);
i_size_write(bdev->bd_inode, (loff_t)mddev->array_size << 10);
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/md/raid5.c linux-2.6.18-rc1-lem/drivers/md/raid5.c
--- linux-2.6.18-rc1/drivers/md/raid5.c 2006-07-09 17:54:11.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/md/raid5.c 2006-07-09 20:12:03.000000000 -0700
@@ -3604,7 +3604,7 @@ static void end_reshape(raid5_conf_t *co
set_capacity(conf->mddev->gendisk, conf->mddev->array_size << 1);
conf->mddev->changed = 1;
- bdev = bdget_disk(conf->mddev->gendisk, 0);
+ bdev = bdget_disk(conf->mddev->gendisk);
if (bdev) {
mutex_lock(&bdev->bd_inode->i_mutex);
i_size_write(bdev->bd_inode, conf->mddev->array_size << 10);
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/message/i2o/i2o_block.c linux-2.6.18-rc1-lem/drivers/message/i2o/i2o_block.c
--- linux-2.6.18-rc1/drivers/message/i2o/i2o_block.c 2006-07-09 17:54:15.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/message/i2o/i2o_block.c 2006-07-09 20:09:48.000000000 -0700
@@ -1010,7 +1010,6 @@ static struct i2o_block_device *i2o_bloc
blk_queue_prep_rq(queue, i2o_block_prep_req_fn);
blk_queue_issue_flush_fn(queue, i2o_block_issue_flush);
- gd->major = I2O_MAJOR;
gd->queue = queue;
gd->fops = &i2o_block_fops;
gd->private_data = dev;
@@ -1087,7 +1086,7 @@ static int i2o_block_probe(struct device
/* setup gendisk */
gd = i2o_blk_dev->gd;
- gd->first_minor = unit << 4;
+ gd->gd_dev = MKDEV(I2O_MAJOR, unit << 4);
sprintf(gd->disk_name, "i2o/hd%c", 'a' + unit);
gd->driverfs_dev = &i2o_dev->device;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/mmc/mmc_block.c linux-2.6.18-rc1-lem/drivers/mmc/mmc_block.c
--- linux-2.6.18-rc1/drivers/mmc/mmc_block.c 2006-07-09 17:54:15.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/mmc/mmc_block.c 2006-07-09 20:12:03.000000000 -0700
@@ -388,8 +388,7 @@ static struct mmc_blk_data *mmc_blk_allo
md->queue.issue_fn = mmc_blk_issue_rq;
md->queue.data = md;
- md->disk->major = major;
- md->disk->first_minor = devidx << MMC_SHIFT;
+ md->disk->gd_dev = MKDEV(major, devidx << MMC_SHIFT);
md->disk->fops = &mmc_bdops;
md->disk->private_data = md;
md->disk->queue = md->queue.queue;
@@ -496,7 +495,7 @@ static void mmc_blk_remove(struct mmc_ca
*/
md->disk->queue = NULL;
- devidx = md->disk->first_minor >> MMC_SHIFT;
+ devidx = MINOR(md->disk->gd_dev) >> MMC_SHIFT;
__clear_bit(devidx, dev_use);
mmc_blk_put(md);
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/mtd/mtd_blkdevs.c linux-2.6.18-rc1-lem/drivers/mtd/mtd_blkdevs.c
--- linux-2.6.18-rc1/drivers/mtd/mtd_blkdevs.c 2006-06-21 14:14:32.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/mtd/mtd_blkdevs.c 2006-07-09 20:12:03.000000000 -0700
@@ -278,8 +278,7 @@ int add_mtd_blktrans_dev(struct mtd_blkt
list_del(&new->list);
return -ENOMEM;
}
- gd->major = tr->major;
- gd->first_minor = (new->devnum) << tr->part_bits;
+ gd->gd_dev = MKDEV(tr->major, new->devnum << tr->part_bits);
gd->fops = &mtd_blktrans_ops;
if (tr->part_bits)
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/s390/block/dasd_genhd.c linux-2.6.18-rc1-lem/drivers/s390/block/dasd_genhd.c
--- linux-2.6.18-rc1/drivers/s390/block/dasd_genhd.c 2006-07-09 17:54:27.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/s390/block/dasd_genhd.c 2006-07-09 20:12:03.000000000 -0700
@@ -40,8 +40,7 @@ dasd_gendisk_alloc(struct dasd_device *d
return -ENOMEM;
/* Initialize gendisk structure. */
- gdp->major = DASD_MAJOR;
- gdp->first_minor = device->devindex << DASD_PARTN_BITS;
+ gdp->gd_dev = MKDEV(DASD_MAJOR, device->devindex << DASD_PARTN_BITS);
gdp->fops = &dasd_device_operations;
gdp->driverfs_dev = &device->cdev->dev;
@@ -97,7 +96,7 @@ dasd_scan_partitions(struct dasd_device
{
struct block_device *bdev;
- bdev = bdget_disk(device->gdp, 0);
+ bdev = bdget_disk(device->gdp);
if (!bdev || blkdev_get(bdev, FMODE_READ, 1) < 0)
return -ENODEV;
/*
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/s390/block/dasd_ioctl.c linux-2.6.18-rc1-lem/drivers/s390/block/dasd_ioctl.c
--- linux-2.6.18-rc1/drivers/s390/block/dasd_ioctl.c 2006-07-09 17:54:27.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/s390/block/dasd_ioctl.c 2006-07-09 20:12:03.000000000 -0700
@@ -156,7 +156,7 @@ dasd_format(struct dasd_device * device,
* enabling the device later.
*/
if (fdata->start_unit == 0) {
- struct block_device *bdev = bdget_disk(device->gdp, 0);
+ struct block_device *bdev = bdget_disk(device->gdp);
bdev->bd_inode->i_blkbits = blksize_bits(fdata->blksize);
bdput(bdev);
}
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/s390/block/dasd_proc.c linux-2.6.18-rc1-lem/drivers/s390/block/dasd_proc.c
--- linux-2.6.18-rc1/drivers/s390/block/dasd_proc.c 2006-07-09 17:54:27.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/s390/block/dasd_proc.c 2006-07-09 20:12:03.000000000 -0700
@@ -67,7 +67,8 @@ dasd_devices_show(struct seq_file *m, vo
/* Print kdev. */
if (device->gdp)
seq_printf(m, " at (%3d:%6d)",
- device->gdp->major, device->gdp->first_minor);
+ MAJOR(device->gdp->gd_dev),
+ MINOR(device->gdp->gd_dev));
else
seq_printf(m, " at (???:??????)");
/* Print device name. */
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/s390/block/dcssblk.c linux-2.6.18-rc1-lem/drivers/s390/block/dcssblk.c
--- linux-2.6.18-rc1/drivers/s390/block/dcssblk.c 2006-06-21 14:14:43.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/s390/block/dcssblk.c 2006-07-09 20:12:03.000000000 -0700
@@ -114,13 +114,13 @@ dcssblk_assign_free_minor(struct dcssblk
found = 0;
// test if minor available
list_for_each_entry(entry, &dcssblk_devices, lh)
- if (minor == entry->gd->first_minor)
+ if (minor == MINOR(entry->gd->gd_dev))
found++;
if (!found) break; // got unused minor
}
if (found)
return -EBUSY;
- dev_info->gd->first_minor = minor;
+ dev_info->gd->gd_dev = MKDEV(dcssblk_major, minor);
return 0;
}
@@ -404,7 +404,6 @@ dcssblk_add_store(struct device *dev, st
rc = -ENOMEM;
goto free_dev_info;
}
- dev_info->gd->major = dcssblk_major;
dev_info->gd->fops = &dcssblk_devops;
dev_info->dcssblk_queue = blk_alloc_queue(GFP_KERNEL);
dev_info->gd->queue = dev_info->dcssblk_queue;
@@ -442,7 +441,7 @@ dcssblk_add_store(struct device *dev, st
goto unload_seg;
}
sprintf(dev_info->gd->disk_name, "dcssblk%d",
- dev_info->gd->first_minor);
+ MINOR(dev_info->gd->gd_dev));
list_add_tail(&dev_info->lh, &dcssblk_devices);
if (!try_module_get(THIS_MODULE)) {
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/s390/block/xpram.c linux-2.6.18-rc1-lem/drivers/s390/block/xpram.c
--- linux-2.6.18-rc1/drivers/s390/block/xpram.c 2006-07-09 17:54:27.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/s390/block/xpram.c 2006-07-09 20:12:03.000000000 -0700
@@ -460,8 +460,7 @@ static int __init xpram_setup_blkdev(voi
xpram_devices[i].size = xpram_sizes[i] / 4;
xpram_devices[i].offset = offset;
offset += xpram_devices[i].size;
- disk->major = XPRAM_MAJOR;
- disk->first_minor = i;
+ disk->gd_dev = MKDEV(XPRAM_MAJOR, i);
disk->fops = &xpram_devops;
disk->private_data = &xpram_devices[i];
disk->queue = xpram_queue;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/s390/char/tape_block.c linux-2.6.18-rc1-lem/drivers/s390/char/tape_block.c
--- linux-2.6.18-rc1/drivers/s390/char/tape_block.c 2006-07-09 17:54:27.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/s390/char/tape_block.c 2006-07-09 20:12:03.000000000 -0700
@@ -240,8 +240,7 @@ tapeblock_setup_device(struct tape_devic
goto cleanup_queue;
}
- disk->major = tapeblock_major;
- disk->first_minor = device->first_minor;
+ disk->gd_dev = MKDEV(tapeblock_major, device->first_minor);
disk->fops = &tapeblock_fops;
disk->private_data = tape_get_device_reference(device);
disk->queue = blkdat->request_queue;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/sbus/char/jsflash.c linux-2.6.18-rc1-lem/drivers/sbus/char/jsflash.c
--- linux-2.6.18-rc1/drivers/sbus/char/jsflash.c 2006-01-03 20:03:29.000000000 -0800
+++ linux-2.6.18-rc1-lem/drivers/sbus/char/jsflash.c 2006-07-09 20:12:03.000000000 -0700
@@ -575,8 +575,7 @@ static int jsfd_init(void)
jsf = &jsf0; /* actually, &jsfv[i >> JSF_PART_BITS] */
jdp = &jsf->dv[i&JSF_PART_MASK];
- disk->major = JSFD_MAJOR;
- disk->first_minor = i;
+ disk->gd_dev = MKDEV(JSFD_MAJOR, i);
sprintf(disk->disk_name, "jsfd%d", i);
disk->fops = &jsfd_fops;
set_capacity(disk, jdp->dsize >> 9);
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/scsi/sd.c linux-2.6.18-rc1-lem/drivers/scsi/sd.c
--- linux-2.6.18-rc1/drivers/scsi/sd.c 2006-07-09 17:54:32.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/scsi/sd.c 2006-07-09 20:12:03.000000000 -0700
@@ -1617,6 +1617,7 @@ static int sd_probe(struct device *dev)
struct scsi_device *sdp = to_scsi_device(dev);
struct scsi_disk *sdkp;
struct gendisk *gd;
+ unsigned int major;
u32 index;
int error;
@@ -1671,8 +1672,8 @@ static int sd_probe(struct device *dev)
sdp->timeout = SD_MOD_TIMEOUT;
}
- gd->major = sd_major((index & 0xf0) >> 4);
- gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00);
+ major = sd_major((index & 0xf0) >> 4);
+ gd->gd_dev = MKDEV(major, ((index & 0xf) << 4) | (index & 0xfff00));
gd->minors = 16;
gd->fops = &sd_fops;
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/scsi/sg.c linux-2.6.18-rc1-lem/drivers/scsi/sg.c
--- linux-2.6.18-rc1/drivers/scsi/sg.c 2006-07-09 17:54:32.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/scsi/sg.c 2006-07-09 20:12:03.000000000 -0700
@@ -1362,7 +1362,7 @@ static int sg_alloc(struct gendisk *disk
SCSI_LOG_TIMEOUT(3, printk("sg_alloc: dev=%d \n", k));
sprintf(disk->disk_name, "sg%d", k);
- disk->first_minor = k;
+ disk->gd_dev = MKDEV(SCSI_GENERIC_MAJOR, k);
sdp->disk = disk;
sdp->device = scsidp;
init_waitqueue_head(&sdp->o_excl_wait);
@@ -1408,7 +1408,6 @@ sg_add(struct class_device *cl_dev, stru
printk(KERN_WARNING "alloc_disk failed\n");
return -ENOMEM;
}
- disk->major = SCSI_GENERIC_MAJOR;
error = -ENOMEM;
cdev = cdev_alloc();
diff -urp -X dontdiff linux-2.6.18-rc1/drivers/scsi/sr.c linux-2.6.18-rc1-lem/drivers/scsi/sr.c
--- linux-2.6.18-rc1/drivers/scsi/sr.c 2006-07-09 17:54:32.000000000 -0700
+++ linux-2.6.18-rc1-lem/drivers/scsi/sr.c 2006-07-09 20:12:03.000000000 -0700
@@ -564,8 +564,7 @@ static int sr_probe(struct device *dev)
__set_bit(minor, sr_index_bits);
spin_unlock(&sr_index_lock);
- disk->major = SCSI_CDROM_MAJOR;
- disk->first_minor = minor;
+ disk->gd_dev = MKDEV(SCSI_CDROM_MAJOR, minor);
sprintf(disk->disk_name, "sr%d", minor);
disk->fops = &sr_bdops;
disk->flags = GENHD_FL_CD;
@@ -853,7 +852,7 @@ static void sr_kref_release(struct kref
struct gendisk *disk = cd->disk;
spin_lock(&sr_index_lock);
- clear_bit(disk->first_minor, sr_index_bits);
+ clear_bit(MINOR(disk->gd_dev), sr_index_bits);
spin_unlock(&sr_index_lock);
unregister_cdrom(&cd->cdi);
diff -urp -X dontdiff linux-2.6.18-rc1/fs/block_dev.c linux-2.6.18-rc1-lem/fs/block_dev.c
--- linux-2.6.18-rc1/fs/block_dev.c 2006-07-09 17:54:41.000000000 -0700
+++ linux-2.6.18-rc1-lem/fs/block_dev.c 2006-07-09 20:12:16.000000000 -0700
@@ -929,7 +929,7 @@ do_open(struct block_device *bdev, struc
} else {
struct hd_struct *p;
struct block_device *whole;
- whole = bdget_disk(disk, 0);
+ whole = bdget_disk(disk);
ret = -ENOMEM;
if (!whole)
goto out_first;
diff -urp -X dontdiff linux-2.6.18-rc1/fs/partitions/check.c linux-2.6.18-rc1-lem/fs/partitions/check.c
--- linux-2.6.18-rc1/fs/partitions/check.c 2006-07-09 17:54:49.000000000 -0700
+++ linux-2.6.18-rc1-lem/fs/partitions/check.c 2006-07-09 20:12:16.000000000 -0700
@@ -129,7 +129,7 @@ char *disk_name(struct gendisk *hd, int
const char *bdevname(struct block_device *bdev, char *buf)
{
- int part = MINOR(bdev->bd_dev) - bdev->bd_disk->first_minor;
+ int part = bdev->bd_dev - bdev->bd_disk->gd_dev;
return disk_name(bdev->bd_disk, part, buf);
}
@@ -226,9 +226,7 @@ static ssize_t part_uevent_store(struct
}
static ssize_t part_dev_read(struct hd_struct * p, char *page)
{
- struct gendisk *disk = container_of(p->kobj.parent,struct gendisk,kobj);
- dev_t dev = MKDEV(disk->major, disk->first_minor + p->partno);
- return print_dev_t(page, dev);
+ return print_dev_t(page, p->dev);
}
static ssize_t part_start_read(struct hd_struct * p, char *page)
{
@@ -338,7 +336,10 @@ void add_partition(struct gendisk *disk,
memset(p, 0, sizeof(*p));
p->start_sect = start;
p->nr_sects = len;
- p->partno = part;
+ if (disk->fops->partmap)
+ p->dev = disk->fops->partmap(disk, part);
+ else
+ p->dev = disk->gd_dev + part;
if (isdigit(disk->kobj.name[strlen(disk->kobj.name)-1]))
snprintf(p->kobj.name,KOBJ_NAME_LEN,"%sp%d",disk->kobj.name,part);
@@ -416,7 +417,7 @@ void register_disk(struct gendisk *disk)
if (!get_capacity(disk))
goto exit;
- bdev = bdget_disk(disk, 0);
+ bdev = bdget_disk(disk);
if (!bdev)
goto exit;
diff -urp -X dontdiff linux-2.6.18-rc1/include/linux/fs.h linux-2.6.18-rc1-lem/include/linux/fs.h
--- linux-2.6.18-rc1/include/linux/fs.h 2006-07-09 17:55:06.000000000 -0700
+++ linux-2.6.18-rc1-lem/include/linux/fs.h 2006-07-09 20:12:16.000000000 -0700
@@ -1011,6 +1011,7 @@ struct block_device_operations {
int (*media_changed) (struct gendisk *);
int (*revalidate_disk) (struct gendisk *);
int (*getgeo)(struct block_device *, struct hd_geometry *);
+ dev_t (*partmap)(struct gendisk *, int partno);
struct module *owner;
};
diff -urp -X dontdiff linux-2.6.18-rc1/include/linux/genhd.h linux-2.6.18-rc1-lem/include/linux/genhd.h
--- linux-2.6.18-rc1/include/linux/genhd.h 2006-07-09 17:55:06.000000000 -0700
+++ linux-2.6.18-rc1-lem/include/linux/genhd.h 2006-07-09 20:12:16.000000000 -0700
@@ -80,7 +80,8 @@ struct hd_struct {
struct kobject kobj;
struct kobject *holder_dir;
unsigned ios[2], sectors[2]; /* READs and WRITEs */
- int policy, partno;
+ int policy;
+ dev_t dev;
};
#define GENHD_FL_REMOVABLE 1
@@ -88,6 +89,7 @@ struct hd_struct {
#define GENHD_FL_CD 8
#define GENHD_FL_UP 16
#define GENHD_FL_SUPPRESS_PARTITION_INFO 32
+#define GENHD_FL_SPARSE_MINORS 64
struct disk_stats {
unsigned long sectors[2]; /* READs and WRITEs */
@@ -97,10 +99,9 @@ struct disk_stats {
unsigned long io_ticks;
unsigned long time_in_queue;
};
-
+
struct gendisk {
- int major; /* major number of driver */
- int first_minor;
+ dev_t gd_dev; /* whole device */
int minors; /* maximum number of minors, =1 for
* disks that can't be partitioned. */
char disk_name[32]; /* name of major driver */
@@ -412,9 +413,9 @@ extern void blk_register_region(dev_t de
void *data);
extern void blk_unregister_region(dev_t dev, unsigned long range);
-static inline struct block_device *bdget_disk(struct gendisk *disk, int index)
+static inline struct block_device *bdget_disk(struct gendisk *disk)
{
- return bdget(MKDEV(disk->major, disk->first_minor) + index);
+ return bdget(disk->gd_dev);
}
#endif
-
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