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[deliverable/linux.git] / include / linux / genhd.h
CommitLineData
1da177e4
LT		 1#ifndef _LINUX_GENHD_H
2#define _LINUX_GENHD_H
3
4/*
5 * genhd.h Copyright (C) 1992 Drew Eckhardt
6 * Generic hard disk header file by
7 * Drew Eckhardt
8 *
9 * <drew@colorado.edu>
10 */
11
1da177e4 12#include <linux/types.h>
edfaa7c3 13#include <linux/kdev_t.h>
1da177e4 14
9361401e
DH		 15#ifdef CONFIG_BLOCK
16
edfaa7c3
KS		 17#define kobj_to_dev(k) container_of(k, struct device, kobj)
18#define dev_to_disk(device) container_of(device, struct gendisk, dev)
19#define dev_to_part(device) container_of(device, struct hd_struct, dev)
20
edfaa7c3
KS		 21extern struct device_type part_type;
22extern struct kobject *block_depr;
23extern struct class block_class;
24
a0db701a
AB		 25extern const struct seq_operations partitions_op;
26extern const struct seq_operations diskstats_op;
27
1da177e4
LT		 28enum {
29/* These three have identical behaviour; use the second one if DOS FDISK gets
30 confused about extended/logical partitions starting past cylinder 1023. */
31 DOS_EXTENDED_PARTITION = 5,
32 LINUX_EXTENDED_PARTITION = 0x85,
33 WIN98_EXTENDED_PARTITION = 0x0f,
34
d18d7682
FMDN		 35 SUN_WHOLE_DISK = DOS_EXTENDED_PARTITION,
36
1da177e4 37 LINUX_SWAP_PARTITION = 0x82,
4419d1ac
OH		 38 LINUX_DATA_PARTITION = 0x83,
39 LINUX_LVM_PARTITION = 0x8e,
1da177e4
LT		 40 LINUX_RAID_PARTITION = 0xfd, /* autodetect RAID partition */
41
42 SOLARIS_X86_PARTITION = LINUX_SWAP_PARTITION,
43 NEW_SOLARIS_X86_PARTITION = 0xbf,
44
45 DM6_AUX1PARTITION = 0x51, /* no DDO: use xlated geom */
46 DM6_AUX3PARTITION = 0x53, /* no DDO: use xlated geom */
47 DM6_PARTITION = 0x54, /* has DDO: use xlated geom & offset */
48 EZD_PARTITION = 0x55, /* EZ-DRIVE */
49
50 FREEBSD_PARTITION = 0xa5, /* FreeBSD Partition ID */
51 OPENBSD_PARTITION = 0xa6, /* OpenBSD Partition ID */
52 NETBSD_PARTITION = 0xa9, /* NetBSD Partition ID */
53 BSDI_PARTITION = 0xb7, /* BSDI Partition ID */
54 MINIX_PARTITION = 0x81, /* Minix Partition ID */
55 UNIXWARE_PARTITION = 0x63, /* Same as GNU_HURD and SCO Unix */
56};
57
34186efc
DW		 58#include <linux/major.h>
59#include <linux/device.h>
60#include <linux/smp.h>
61#include <linux/string.h>
62#include <linux/fs.h>
8ce7ad7b 63#include <linux/workqueue.h>
34186efc 64
1da177e4
LT		 65struct partition {
66 unsigned char boot_ind; /* 0x80 - active */
67 unsigned char head; /* starting head */
68 unsigned char sector; /* starting sector */
69 unsigned char cyl; /* starting cylinder */
70 unsigned char sys_ind; /* What partition type */
71 unsigned char end_head; /* end head */
72 unsigned char end_sector; /* end sector */
73 unsigned char end_cyl; /* end cylinder */
74 __le32 start_sect; /* starting sector counting from 0 */
75 __le32 nr_sects; /* nr of sectors in partition */
76} __attribute__((packed));
77
ea5c48ab
JM		 78struct disk_stats {
79 unsigned long sectors[2]; /* READs and WRITEs */
80 unsigned long ios[2];
81 unsigned long merges[2];
82 unsigned long ticks[2];
83 unsigned long io_ticks;
84 unsigned long time_in_queue;
85};
86
1da177e4
LT		 87struct hd_struct {
88 sector_t start_sect;
89 sector_t nr_sects;
edfaa7c3 90 struct device dev;
6a4d44c1 91 struct kobject *holder_dir;
1da177e4 92 int policy, partno;
c17bb495
AM		 93#ifdef CONFIG_FAIL_MAKE_REQUEST
94 int make_it_fail;
ea5c48ab
JM		 95#endif
96 unsigned long stamp;
97 int in_flight;
98#ifdef CONFIG_SMP
99 struct disk_stats *dkstats;
100#else
101 struct disk_stats dkstats;
c17bb495 102#endif
1da177e4
LT		 103};
104
105#define GENHD_FL_REMOVABLE 1
106#define GENHD_FL_DRIVERFS 2
86ce18d7 107#define GENHD_FL_MEDIA_CHANGE_NOTIFY 4
1da177e4
LT		 108#define GENHD_FL_CD 8
109#define GENHD_FL_UP 16
110#define GENHD_FL_SUPPRESS_PARTITION_INFO 32
c17bb495 111#define GENHD_FL_FAIL 64
1da177e4 112
1da177e4
LT		 113struct gendisk {
114 int major; /* major number of driver */
115 int first_minor;
116 int minors; /* maximum number of minors, =1 for
117 * disks that can't be partitioned. */
118 char disk_name[32]; /* name of major driver */
310a2c10 119 struct hd_struct **part; /* [indexed by minor - 1] */
1da177e4
LT		 120 struct block_device_operations *fops;
121 struct request_queue *queue;
122 void *private_data;
123 sector_t capacity;
124
125 int flags;
edfaa7c3
KS		 126 struct device *driverfs_dev; // FIXME: remove
127 struct device dev;
6a4d44c1
JN		 128 struct kobject *holder_dir;
129 struct kobject *slave_dir;
1da177e4
LT		 130
131 struct timer_rand_state *random;
132 int policy;
133
134 atomic_t sync_io; /* RAID */
20e5c81f 135 unsigned long stamp;
1da177e4
LT		 136 int in_flight;
137#ifdef CONFIG_SMP
138 struct disk_stats *dkstats;
139#else
140 struct disk_stats dkstats;
141#endif
8ce7ad7b 142 struct work_struct async_notify;
7ba1ba12
MP		 143#ifdef CONFIG_BLK_DEV_INTEGRITY
144 struct blk_integrity *integrity;
145#endif
1da177e4
LT		 146};
147
310a2c10
TH		 148static inline struct gendisk *part_to_disk(struct hd_struct *part)
149{
150 if (likely(part))
151 return dev_to_disk((part)->dev.parent);
152 return NULL;
153}
154
1da177e4
LT		 155/*
156 * Macros to operate on percpu disk statistics:
157 *
158 * The __ variants should only be called in critical sections. The full
159 * variants disable/enable preemption.
160 */
310a2c10
TH		 161static inline struct hd_struct *disk_map_sector(struct gendisk *gendiskp,
162 sector_t sector)
ea5c48ab
JM		 163{
164 struct hd_struct *part;
165 int i;
166 for (i = 0; i < gendiskp->minors - 1; i++) {
167 part = gendiskp->part[i];
168 if (part && part->start_sect <= sector
169 && sector < part->start_sect + part->nr_sects)
170 return part;
171 }
172 return NULL;
173}
174
1da177e4
LT		 175#ifdef CONFIG_SMP
176#define __disk_stat_add(gendiskp, field, addnd) \
177 (per_cpu_ptr(gendiskp->dkstats, smp_processor_id())->field += addnd)
178
179#define disk_stat_read(gendiskp, field) \
180({ \
181 typeof(gendiskp->dkstats->field) res = 0; \
182 int i; \
0a945022 183 for_each_possible_cpu(i) \
1da177e4 184 res += per_cpu_ptr(gendiskp->dkstats, i)->field; \
1da177e4
LT		 185 res; \
186})
187
188static inline void disk_stat_set_all(struct gendisk *gendiskp, int value) {
189 int i;
28f13702 190
0a945022 191 for_each_possible_cpu(i)
394e3902 192 memset(per_cpu_ptr(gendiskp->dkstats, i), value,
28f13702 193 sizeof(struct disk_stats));
1da177e4 194}
ea5c48ab
JM		 195
196#define __part_stat_add(part, field, addnd) \
197 (per_cpu_ptr(part->dkstats, smp_processor_id())->field += addnd)
198
28f13702 199#define __all_stat_add(gendiskp, part, field, addnd, sector) \
ea5c48ab 200({ \
ea5c48ab
JM		 201 if (part) \
202 __part_stat_add(part, field, addnd); \
203 __disk_stat_add(gendiskp, field, addnd); \
204})
205
206#define part_stat_read(part, field) \
207({ \
208 typeof(part->dkstats->field) res = 0; \
209 int i; \
210 for_each_possible_cpu(i) \
211 res += per_cpu_ptr(part->dkstats, i)->field; \
212 res; \
213})
214
28f13702
JA		 215static inline void part_stat_set_all(struct hd_struct *part, int value)
216{
ea5c48ab 217 int i;
28f13702 218
ea5c48ab
JM		 219 for_each_possible_cpu(i)
220 memset(per_cpu_ptr(part->dkstats, i), value,
28f13702 221 sizeof(struct disk_stats));
ea5c48ab 222}
1da177e4 223
a8ae50ba 224#else /* !CONFIG_SMP */
1da177e4
LT		 225#define __disk_stat_add(gendiskp, field, addnd) \
226 (gendiskp->dkstats.field += addnd)
227#define disk_stat_read(gendiskp, field) (gendiskp->dkstats.field)
228
ea5c48ab
JM		 229static inline void disk_stat_set_all(struct gendisk *gendiskp, int value)
230{
1da177e4
LT		 231 memset(&gendiskp->dkstats, value, sizeof (struct disk_stats));
232}
ea5c48ab
JM		 233
234#define __part_stat_add(part, field, addnd) \
235 (part->dkstats.field += addnd)
236
28f13702 237#define __all_stat_add(gendiskp, part, field, addnd, sector) \
ea5c48ab 238({ \
ea5c48ab
JM		 239 if (part) \
240 part->dkstats.field += addnd; \
241 __disk_stat_add(gendiskp, field, addnd); \
242})
243
244#define part_stat_read(part, field) (part->dkstats.field)
245
246static inline void part_stat_set_all(struct hd_struct *part, int value)
247{
248 memset(&part->dkstats, value, sizeof(struct disk_stats));
249}
250
a8ae50ba 251#endif /* CONFIG_SMP */
1da177e4
LT		 252
253#define disk_stat_add(gendiskp, field, addnd) \
254 do { \
255 preempt_disable(); \
256 __disk_stat_add(gendiskp, field, addnd); \
257 preempt_enable(); \
258 } while (0)
259
260#define __disk_stat_dec(gendiskp, field) __disk_stat_add(gendiskp, field, -1)
261#define disk_stat_dec(gendiskp, field) disk_stat_add(gendiskp, field, -1)
262
263#define __disk_stat_inc(gendiskp, field) __disk_stat_add(gendiskp, field, 1)
264#define disk_stat_inc(gendiskp, field) disk_stat_add(gendiskp, field, 1)
265
266#define __disk_stat_sub(gendiskp, field, subnd) \
267 __disk_stat_add(gendiskp, field, -subnd)
268#define disk_stat_sub(gendiskp, field, subnd) \
269 disk_stat_add(gendiskp, field, -subnd)
270
ea5c48ab
JM		 271#define part_stat_add(gendiskp, field, addnd) \
272 do { \
273 preempt_disable(); \
274 __part_stat_add(gendiskp, field, addnd);\
275 preempt_enable(); \
276 } while (0)
277
278#define __part_stat_dec(gendiskp, field) __part_stat_add(gendiskp, field, -1)
279#define part_stat_dec(gendiskp, field) part_stat_add(gendiskp, field, -1)
280
281#define __part_stat_inc(gendiskp, field) __part_stat_add(gendiskp, field, 1)
282#define part_stat_inc(gendiskp, field) part_stat_add(gendiskp, field, 1)
283
284#define __part_stat_sub(gendiskp, field, subnd) \
285 __part_stat_add(gendiskp, field, -subnd)
286#define part_stat_sub(gendiskp, field, subnd) \
287 part_stat_add(gendiskp, field, -subnd)
288
28f13702 289#define all_stat_add(gendiskp, part, field, addnd, sector) \
ea5c48ab
JM		 290 do { \
291 preempt_disable(); \
28f13702 292 __all_stat_add(gendiskp, part, field, addnd, sector); \
ea5c48ab
JM		 293 preempt_enable(); \
294 } while (0)
295
296#define __all_stat_dec(gendiskp, field, sector) \
297 __all_stat_add(gendiskp, field, -1, sector)
298#define all_stat_dec(gendiskp, field, sector) \
299 all_stat_add(gendiskp, field, -1, sector)
300
28f13702
JA		 301#define __all_stat_inc(gendiskp, part, field, sector) \
302 __all_stat_add(gendiskp, part, field, 1, sector)
303#define all_stat_inc(gendiskp, part, field, sector) \
304 all_stat_add(gendiskp, part, field, 1, sector)
ea5c48ab 305
28f13702
JA		 306#define __all_stat_sub(gendiskp, part, field, subnd, sector) \
307 __all_stat_add(gendiskp, part, field, -subnd, sector)
308#define all_stat_sub(gendiskp, part, field, subnd, sector) \
309 all_stat_add(gendiskp, part, field, -subnd, sector)
1da177e4
LT		 310
311/* Inlines to alloc and free disk stats in struct gendisk */
312#ifdef CONFIG_SMP
313static inline int init_disk_stats(struct gendisk *disk)
314{
315 disk->dkstats = alloc_percpu(struct disk_stats);
316 if (!disk->dkstats)
317 return 0;
318 return 1;
319}
320
321static inline void free_disk_stats(struct gendisk *disk)
322{
323 free_percpu(disk->dkstats);
324}
ea5c48ab
JM		 325
326static inline int init_part_stats(struct hd_struct *part)
327{
328 part->dkstats = alloc_percpu(struct disk_stats);
329 if (!part->dkstats)
330 return 0;
331 return 1;
332}
333
334static inline void free_part_stats(struct hd_struct *part)
335{
336 free_percpu(part->dkstats);
337}
338
1da177e4
LT		 339#else /* CONFIG_SMP */
340static inline int init_disk_stats(struct gendisk *disk)
341{
342 return 1;
343}
344
345static inline void free_disk_stats(struct gendisk *disk)
346{
347}
ea5c48ab
JM		 348
349static inline int init_part_stats(struct hd_struct *part)
350{
351 return 1;
352}
353
354static inline void free_part_stats(struct hd_struct *part)
355{
356}
1da177e4
LT		 357#endif /* CONFIG_SMP */
358
359/* drivers/block/ll_rw_blk.c */
360extern void disk_round_stats(struct gendisk *disk);
6f2576af 361extern void part_round_stats(struct hd_struct *part);
1da177e4
LT		 362
363/* drivers/block/genhd.c */
ac20427e 364extern int get_blkdev_list(char *, int);
1da177e4
LT		 365extern void add_disk(struct gendisk *disk);
366extern void del_gendisk(struct gendisk *gp);
367extern void unlink_gendisk(struct gendisk *gp);
368extern struct gendisk *get_gendisk(dev_t dev, int *part);
369
370extern void set_device_ro(struct block_device *bdev, int flag);
371extern void set_disk_ro(struct gendisk *disk, int flag);
372
373/* drivers/char/random.c */
374extern void add_disk_randomness(struct gendisk *disk);
375extern void rand_initialize_disk(struct gendisk *disk);
376
377static inline sector_t get_start_sect(struct block_device *bdev)
378{
379 return bdev->bd_contains == bdev ? 0 : bdev->bd_part->start_sect;
380}
381static inline sector_t get_capacity(struct gendisk *disk)
382{
383 return disk->capacity;
384}
385static inline void set_capacity(struct gendisk *disk, sector_t size)
386{
387 disk->capacity = size;
388}
389
1da177e4
LT		 390#ifdef CONFIG_SOLARIS_X86_PARTITION
391
b84d8796 392#define SOLARIS_X86_NUMSLICE 16
1da177e4
LT		 393#define SOLARIS_X86_VTOC_SANE (0x600DDEEEUL)
394
395struct solaris_x86_slice {
396 __le16 s_tag; /* ID tag of partition */
397 __le16 s_flag; /* permission flags */
398 __le32 s_start; /* start sector no of partition */
399 __le32 s_size; /* # of blocks in partition */
400};
401
402struct solaris_x86_vtoc {
403 unsigned int v_bootinfo[3]; /* info needed by mboot (unsupported) */
404 __le32 v_sanity; /* to verify vtoc sanity */
405 __le32 v_version; /* layout version */
406 char v_volume[8]; /* volume name */
407 __le16 v_sectorsz; /* sector size in bytes */
408 __le16 v_nparts; /* number of partitions */
409 unsigned int v_reserved[10]; /* free space */
410 struct solaris_x86_slice
411 v_slice[SOLARIS_X86_NUMSLICE]; /* slice headers */
412 unsigned int timestamp[SOLARIS_X86_NUMSLICE]; /* timestamp (unsupported) */
413 char v_asciilabel[128]; /* for compatibility */
414};
415
416#endif /* CONFIG_SOLARIS_X86_PARTITION */
417
418#ifdef CONFIG_BSD_DISKLABEL
419/*
420 * BSD disklabel support by Yossi Gottlieb <yogo@math.tau.ac.il>
421 * updated by Marc Espie <Marc.Espie@openbsd.org>
422 */
423
424/* check against BSD src/sys/sys/disklabel.h for consistency */
425
426#define BSD_DISKMAGIC (0x82564557UL) /* The disk magic number */
427#define BSD_MAXPARTITIONS 16
428#define OPENBSD_MAXPARTITIONS 16
429#define BSD_FS_UNUSED 0 /* disklabel unused partition entry ID */
430struct bsd_disklabel {
431 __le32 d_magic; /* the magic number */
432 __s16 d_type; /* drive type */
433 __s16 d_subtype; /* controller/d_type specific */
434 char d_typename[16]; /* type name, e.g. "eagle" */
435 char d_packname[16]; /* pack identifier */
436 __u32 d_secsize; /* # of bytes per sector */
437 __u32 d_nsectors; /* # of data sectors per track */
438 __u32 d_ntracks; /* # of tracks per cylinder */
439 __u32 d_ncylinders; /* # of data cylinders per unit */
440 __u32 d_secpercyl; /* # of data sectors per cylinder */
441 __u32 d_secperunit; /* # of data sectors per unit */
442 __u16 d_sparespertrack; /* # of spare sectors per track */
443 __u16 d_sparespercyl; /* # of spare sectors per cylinder */
444 __u32 d_acylinders; /* # of alt. cylinders per unit */
445 __u16 d_rpm; /* rotational speed */
446 __u16 d_interleave; /* hardware sector interleave */
447 __u16 d_trackskew; /* sector 0 skew, per track */
448 __u16 d_cylskew; /* sector 0 skew, per cylinder */
449 __u32 d_headswitch; /* head switch time, usec */
450 __u32 d_trkseek; /* track-to-track seek, usec */
451 __u32 d_flags; /* generic flags */
452#define NDDATA 5
453 __u32 d_drivedata[NDDATA]; /* drive-type specific information */
454#define NSPARE 5
455 __u32 d_spare[NSPARE]; /* reserved for future use */
456 __le32 d_magic2; /* the magic number (again) */
457 __le16 d_checksum; /* xor of data incl. partitions */
458
459 /* filesystem and partition information: */
460 __le16 d_npartitions; /* number of partitions in following */
461 __le32 d_bbsize; /* size of boot area at sn0, bytes */
462 __le32 d_sbsize; /* max size of fs superblock, bytes */
463 struct bsd_partition { /* the partition table */
464 __le32 p_size; /* number of sectors in partition */
465 __le32 p_offset; /* starting sector */
466 __le32 p_fsize; /* filesystem basic fragment size */
467 __u8 p_fstype; /* filesystem type, see below */
468 __u8 p_frag; /* filesystem fragments per block */
469 __le16 p_cpg; /* filesystem cylinders per group */
470 } d_partitions[BSD_MAXPARTITIONS]; /* actually may be more */
471};
472
473#endif /* CONFIG_BSD_DISKLABEL */
474
475#ifdef CONFIG_UNIXWARE_DISKLABEL
476/*
477 * Unixware slices support by Andrzej Krzysztofowicz <ankry@mif.pg.gda.pl>
478 * and Krzysztof G. Baranowski <kgb@knm.org.pl>
479 */
480
481#define UNIXWARE_DISKMAGIC (0xCA5E600DUL) /* The disk magic number */
482#define UNIXWARE_DISKMAGIC2 (0x600DDEEEUL) /* The slice table magic nr */
483#define UNIXWARE_NUMSLICE 16
484#define UNIXWARE_FS_UNUSED 0 /* Unused slice entry ID */
485
486struct unixware_slice {
487 __le16 s_label; /* label */
488 __le16 s_flags; /* permission flags */
489 __le32 start_sect; /* starting sector */
490 __le32 nr_sects; /* number of sectors in slice */
491};
492
493struct unixware_disklabel {
494 __le32 d_type; /* drive type */
495 __le32 d_magic; /* the magic number */
496 __le32 d_version; /* version number */
497 char d_serial[12]; /* serial number of the device */
498 __le32 d_ncylinders; /* # of data cylinders per device */
499 __le32 d_ntracks; /* # of tracks per cylinder */
500 __le32 d_nsectors; /* # of data sectors per track */
501 __le32 d_secsize; /* # of bytes per sector */
502 __le32 d_part_start; /* # of first sector of this partition */
503 __le32 d_unknown1[12]; /* ? */
504 __le32 d_alt_tbl; /* byte offset of alternate table */
505 __le32 d_alt_len; /* byte length of alternate table */
506 __le32 d_phys_cyl; /* # of physical cylinders per device */
507 __le32 d_phys_trk; /* # of physical tracks per cylinder */
508 __le32 d_phys_sec; /* # of physical sectors per track */
509 __le32 d_phys_bytes; /* # of physical bytes per sector */
510 __le32 d_unknown2; /* ? */
511 __le32 d_unknown3; /* ? */
512 __le32 d_pad[8]; /* pad */
513
514 struct unixware_vtoc {
515 __le32 v_magic; /* the magic number */
516 __le32 v_version; /* version number */
517 char v_name[8]; /* volume name */
518 __le16 v_nslices; /* # of slices */
519 __le16 v_unknown1; /* ? */
520 __le32 v_reserved[10]; /* reserved */
521 struct unixware_slice
522 v_slice[UNIXWARE_NUMSLICE]; /* slice headers */
523 } vtoc;
524
525}; /* 408 */
526
527#endif /* CONFIG_UNIXWARE_DISKLABEL */
528
529#ifdef CONFIG_MINIX_SUBPARTITION
530# define MINIX_NR_SUBPARTITIONS 4
531#endif /* CONFIG_MINIX_SUBPARTITION */
532
d18d7682
FMDN		 533#define ADDPART_FLAG_NONE 0
534#define ADDPART_FLAG_RAID 1
535#define ADDPART_FLAG_WHOLEDISK 2
536
30f2f0eb 537extern dev_t blk_lookup_devt(const char *name, int part);
edfaa7c3 538extern char *disk_name (struct gendisk *hd, int part, char *buf);
1da177e4
LT		 539
540extern int rescan_partitions(struct gendisk *disk, struct block_device *bdev);
d805dda4 541extern int __must_check add_partition(struct gendisk *, int, sector_t, sector_t, int);
1da177e4 542extern void delete_partition(struct gendisk *, int);
dd2a345f 543extern void printk_all_partitions(void);
1da177e4 544
1946089a 545extern struct gendisk *alloc_disk_node(int minors, int node_id);
1da177e4
LT		 546extern struct gendisk *alloc_disk(int minors);
547extern struct kobject *get_disk(struct gendisk *disk);
548extern void put_disk(struct gendisk *disk);
edfaa7c3 549extern void blk_register_region(dev_t devt, unsigned long range,
1da177e4
LT		 550 struct module *module,
551 struct kobject *(*probe)(dev_t, int *, void *),
552 int (*lock)(dev_t, void *),
553 void *data);
edfaa7c3 554extern void blk_unregister_region(dev_t devt, unsigned long range);
1da177e4
LT		 555
556static inline struct block_device *bdget_disk(struct gendisk *disk, int index)
557{
558 return bdget(MKDEV(disk->major, disk->first_minor) + index);
559}
560
87c1efbf
JA		 561#else /* CONFIG_BLOCK */
562
563static inline void printk_all_partitions(void) { }
564
30f2f0eb 565static inline dev_t blk_lookup_devt(const char *name, int part)
edfaa7c3
KS		 566{
567 dev_t devt = MKDEV(0, 0);
568 return devt;
569}
570
87c1efbf 571#endif /* CONFIG_BLOCK */
9361401e 572
a8ae50ba 573#endif /* _LINUX_GENHD_H */
Linux kernel - Deliverables
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