]>
Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
8324aa91 JA |
2 | #ifndef BLK_INTERNAL_H |
3 | #define BLK_INTERNAL_H | |
4 | ||
a73f730d | 5 | #include <linux/idr.h> |
f70ced09 | 6 | #include <linux/blk-mq.h> |
c6a564ff | 7 | #include <linux/part_stat.h> |
c39ae60d | 8 | #include <xen/xen.h> |
f70ced09 | 9 | #include "blk-mq.h" |
c3e22192 | 10 | #include "blk-mq-sched.h" |
a73f730d | 11 | |
0d2602ca JA |
12 | /* Max future timer expiry for timeouts */ |
13 | #define BLK_MAX_TIMEOUT (5 * HZ) | |
14 | ||
18fbda91 OS |
15 | #ifdef CONFIG_DEBUG_FS |
16 | extern struct dentry *blk_debugfs_root; | |
17 | #endif | |
18 | ||
7c94e1c1 ML |
19 | struct blk_flush_queue { |
20 | unsigned int flush_queue_delayed:1; | |
21 | unsigned int flush_pending_idx:1; | |
22 | unsigned int flush_running_idx:1; | |
8d699663 | 23 | blk_status_t rq_status; |
7c94e1c1 ML |
24 | unsigned long flush_pending_since; |
25 | struct list_head flush_queue[2]; | |
26 | struct list_head flush_data_in_flight; | |
27 | struct request *flush_rq; | |
0048b483 ML |
28 | |
29 | /* | |
30 | * flush_rq shares tag with this rq, both can't be active | |
31 | * at the same time | |
32 | */ | |
33 | struct request *orig_rq; | |
b3c6a599 | 34 | struct lock_class_key key; |
7c94e1c1 ML |
35 | spinlock_t mq_flush_lock; |
36 | }; | |
37 | ||
8324aa91 JA |
38 | extern struct kmem_cache *blk_requestq_cachep; |
39 | extern struct kobj_type blk_queue_ktype; | |
a73f730d | 40 | extern struct ida blk_queue_ida; |
8324aa91 | 41 | |
f9afca4d JA |
42 | static inline struct blk_flush_queue * |
43 | blk_get_flush_queue(struct request_queue *q, struct blk_mq_ctx *ctx) | |
7c94e1c1 | 44 | { |
8ccdf4a3 | 45 | return blk_mq_map_queue(q, REQ_OP_FLUSH, ctx)->fq; |
7c94e1c1 ML |
46 | } |
47 | ||
09ac46c4 TH |
48 | static inline void __blk_get_queue(struct request_queue *q) |
49 | { | |
50 | kobject_get(&q->kobj); | |
51 | } | |
52 | ||
8d699663 YY |
53 | static inline bool |
54 | is_flush_rq(struct request *req, struct blk_mq_hw_ctx *hctx) | |
55 | { | |
56 | return hctx->fq->flush_rq == req; | |
57 | } | |
58 | ||
754a1572 GJ |
59 | struct blk_flush_queue *blk_alloc_flush_queue(int node, int cmd_size, |
60 | gfp_t flags); | |
f70ced09 | 61 | void blk_free_flush_queue(struct blk_flush_queue *q); |
f3552655 | 62 | |
3ef28e83 DW |
63 | void blk_freeze_queue(struct request_queue *q); |
64 | ||
65 | static inline void blk_queue_enter_live(struct request_queue *q) | |
66 | { | |
67 | /* | |
68 | * Given that running in generic_make_request() context | |
69 | * guarantees that a live reference against q_usage_counter has | |
70 | * been established, further references under that same context | |
71 | * need not check that the queue has been frozen (marked dead). | |
72 | */ | |
73 | percpu_ref_get(&q->q_usage_counter); | |
74 | } | |
8324aa91 | 75 | |
3dccdae5 CH |
76 | static inline bool biovec_phys_mergeable(struct request_queue *q, |
77 | struct bio_vec *vec1, struct bio_vec *vec2) | |
6a9f5f24 | 78 | { |
3dccdae5 | 79 | unsigned long mask = queue_segment_boundary(q); |
6e768461 CH |
80 | phys_addr_t addr1 = page_to_phys(vec1->bv_page) + vec1->bv_offset; |
81 | phys_addr_t addr2 = page_to_phys(vec2->bv_page) + vec2->bv_offset; | |
3dccdae5 CH |
82 | |
83 | if (addr1 + vec1->bv_len != addr2) | |
6a9f5f24 | 84 | return false; |
0383ad43 | 85 | if (xen_domain() && !xen_biovec_phys_mergeable(vec1, vec2->bv_page)) |
6a9f5f24 | 86 | return false; |
3dccdae5 CH |
87 | if ((addr1 | mask) != ((addr2 + vec2->bv_len - 1) | mask)) |
88 | return false; | |
6a9f5f24 CH |
89 | return true; |
90 | } | |
91 | ||
27ca1d4e CH |
92 | static inline bool __bvec_gap_to_prev(struct request_queue *q, |
93 | struct bio_vec *bprv, unsigned int offset) | |
94 | { | |
df376b2e | 95 | return (offset & queue_virt_boundary(q)) || |
27ca1d4e CH |
96 | ((bprv->bv_offset + bprv->bv_len) & queue_virt_boundary(q)); |
97 | } | |
98 | ||
99 | /* | |
100 | * Check if adding a bio_vec after bprv with offset would create a gap in | |
101 | * the SG list. Most drivers don't care about this, but some do. | |
102 | */ | |
103 | static inline bool bvec_gap_to_prev(struct request_queue *q, | |
104 | struct bio_vec *bprv, unsigned int offset) | |
105 | { | |
106 | if (!queue_virt_boundary(q)) | |
107 | return false; | |
108 | return __bvec_gap_to_prev(q, bprv, offset); | |
109 | } | |
110 | ||
1aa0a133 CH |
111 | static inline void blk_rq_bio_prep(struct request *rq, struct bio *bio, |
112 | unsigned int nr_segs) | |
113 | { | |
114 | rq->nr_phys_segments = nr_segs; | |
115 | rq->__data_len = bio->bi_iter.bi_size; | |
116 | rq->bio = rq->biotail = bio; | |
117 | rq->ioprio = bio_prio(bio); | |
118 | ||
119 | if (bio->bi_disk) | |
120 | rq->rq_disk = bio->bi_disk; | |
121 | } | |
122 | ||
5a48fc14 DW |
123 | #ifdef CONFIG_BLK_DEV_INTEGRITY |
124 | void blk_flush_integrity(void); | |
7c20f116 | 125 | bool __bio_integrity_endio(struct bio *); |
ece841ab | 126 | void bio_integrity_free(struct bio *bio); |
7c20f116 CH |
127 | static inline bool bio_integrity_endio(struct bio *bio) |
128 | { | |
129 | if (bio_integrity(bio)) | |
130 | return __bio_integrity_endio(bio); | |
131 | return true; | |
132 | } | |
43b729bf CH |
133 | |
134 | static inline bool integrity_req_gap_back_merge(struct request *req, | |
135 | struct bio *next) | |
136 | { | |
137 | struct bio_integrity_payload *bip = bio_integrity(req->bio); | |
138 | struct bio_integrity_payload *bip_next = bio_integrity(next); | |
139 | ||
140 | return bvec_gap_to_prev(req->q, &bip->bip_vec[bip->bip_vcnt - 1], | |
141 | bip_next->bip_vec[0].bv_offset); | |
142 | } | |
143 | ||
144 | static inline bool integrity_req_gap_front_merge(struct request *req, | |
145 | struct bio *bio) | |
146 | { | |
147 | struct bio_integrity_payload *bip = bio_integrity(bio); | |
148 | struct bio_integrity_payload *bip_next = bio_integrity(req->bio); | |
149 | ||
150 | return bvec_gap_to_prev(req->q, &bip->bip_vec[bip->bip_vcnt - 1], | |
151 | bip_next->bip_vec[0].bv_offset); | |
152 | } | |
581e2600 CH |
153 | |
154 | void blk_integrity_add(struct gendisk *); | |
155 | void blk_integrity_del(struct gendisk *); | |
43b729bf CH |
156 | #else /* CONFIG_BLK_DEV_INTEGRITY */ |
157 | static inline bool integrity_req_gap_back_merge(struct request *req, | |
158 | struct bio *next) | |
159 | { | |
160 | return false; | |
161 | } | |
162 | static inline bool integrity_req_gap_front_merge(struct request *req, | |
163 | struct bio *bio) | |
164 | { | |
165 | return false; | |
166 | } | |
167 | ||
5a48fc14 DW |
168 | static inline void blk_flush_integrity(void) |
169 | { | |
170 | } | |
7c20f116 CH |
171 | static inline bool bio_integrity_endio(struct bio *bio) |
172 | { | |
173 | return true; | |
174 | } | |
ece841ab JT |
175 | static inline void bio_integrity_free(struct bio *bio) |
176 | { | |
177 | } | |
581e2600 CH |
178 | static inline void blk_integrity_add(struct gendisk *disk) |
179 | { | |
180 | } | |
181 | static inline void blk_integrity_del(struct gendisk *disk) | |
182 | { | |
183 | } | |
43b729bf | 184 | #endif /* CONFIG_BLK_DEV_INTEGRITY */ |
8324aa91 | 185 | |
0d2602ca | 186 | unsigned long blk_rq_timeout(unsigned long timeout); |
87ee7b11 | 187 | void blk_add_timer(struct request *req); |
320ae51f | 188 | |
14ccb66b CH |
189 | bool bio_attempt_front_merge(struct request *req, struct bio *bio, |
190 | unsigned int nr_segs); | |
191 | bool bio_attempt_back_merge(struct request *req, struct bio *bio, | |
192 | unsigned int nr_segs); | |
1e739730 CH |
193 | bool bio_attempt_discard_merge(struct request_queue *q, struct request *req, |
194 | struct bio *bio); | |
320ae51f | 195 | bool blk_attempt_plug_merge(struct request_queue *q, struct bio *bio, |
14ccb66b | 196 | unsigned int nr_segs, struct request **same_queue_rq); |
320ae51f JA |
197 | |
198 | void blk_account_io_start(struct request *req, bool new_io); | |
199 | void blk_account_io_completion(struct request *req, unsigned int bytes); | |
522a7775 | 200 | void blk_account_io_done(struct request *req, u64 now); |
320ae51f | 201 | |
158dbda0 TH |
202 | /* |
203 | * Internal elevator interface | |
204 | */ | |
e8064021 | 205 | #define ELV_ON_HASH(rq) ((rq)->rq_flags & RQF_HASHED) |
158dbda0 | 206 | |
ae1b1539 | 207 | void blk_insert_flush(struct request *rq); |
dd831006 | 208 | |
954b4a5c | 209 | void elevator_init_mq(struct request_queue *q); |
d48ece20 JW |
210 | int elevator_switch_mq(struct request_queue *q, |
211 | struct elevator_type *new_e); | |
c3e22192 | 212 | void __elevator_exit(struct request_queue *, struct elevator_queue *); |
cecf5d87 | 213 | int elv_register_queue(struct request_queue *q, bool uevent); |
83d016ac BVA |
214 | void elv_unregister_queue(struct request_queue *q); |
215 | ||
c3e22192 ML |
216 | static inline void elevator_exit(struct request_queue *q, |
217 | struct elevator_queue *e) | |
218 | { | |
284b94be ML |
219 | lockdep_assert_held(&q->sysfs_lock); |
220 | ||
c3e22192 ML |
221 | blk_mq_sched_free_requests(q); |
222 | __elevator_exit(q, e); | |
223 | } | |
224 | ||
807d4af2 CH |
225 | struct hd_struct *__disk_get_part(struct gendisk *disk, int partno); |
226 | ||
3ad5cee5 CH |
227 | ssize_t part_size_show(struct device *dev, struct device_attribute *attr, |
228 | char *buf); | |
229 | ssize_t part_stat_show(struct device *dev, struct device_attribute *attr, | |
230 | char *buf); | |
231 | ssize_t part_inflight_show(struct device *dev, struct device_attribute *attr, | |
232 | char *buf); | |
233 | ssize_t part_fail_show(struct device *dev, struct device_attribute *attr, | |
234 | char *buf); | |
235 | ssize_t part_fail_store(struct device *dev, struct device_attribute *attr, | |
236 | const char *buf, size_t count); | |
237 | ||
581d4e28 JA |
238 | #ifdef CONFIG_FAIL_IO_TIMEOUT |
239 | int blk_should_fake_timeout(struct request_queue *); | |
240 | ssize_t part_timeout_show(struct device *, struct device_attribute *, char *); | |
241 | ssize_t part_timeout_store(struct device *, struct device_attribute *, | |
242 | const char *, size_t); | |
243 | #else | |
244 | static inline int blk_should_fake_timeout(struct request_queue *q) | |
245 | { | |
246 | return 0; | |
247 | } | |
248 | #endif | |
249 | ||
14ccb66b CH |
250 | void __blk_queue_split(struct request_queue *q, struct bio **bio, |
251 | unsigned int *nr_segs); | |
252 | int ll_back_merge_fn(struct request *req, struct bio *bio, | |
253 | unsigned int nr_segs); | |
254 | int ll_front_merge_fn(struct request *req, struct bio *bio, | |
255 | unsigned int nr_segs); | |
b973cb7e JA |
256 | struct request *attempt_back_merge(struct request_queue *q, struct request *rq); |
257 | struct request *attempt_front_merge(struct request_queue *q, struct request *rq); | |
5e84ea3a JA |
258 | int blk_attempt_req_merge(struct request_queue *q, struct request *rq, |
259 | struct request *next); | |
e9cd19c0 | 260 | unsigned int blk_recalc_rq_segments(struct request *rq); |
80a761fd | 261 | void blk_rq_set_mixed_merge(struct request *rq); |
050c8ea8 | 262 | bool blk_rq_merge_ok(struct request *rq, struct bio *bio); |
34fe7c05 | 263 | enum elv_merge blk_try_merge(struct request *rq, struct bio *bio); |
d6d48196 | 264 | |
ff88972c AB |
265 | int blk_dev_init(void); |
266 | ||
c2553b58 JA |
267 | /* |
268 | * Contribute to IO statistics IFF: | |
269 | * | |
270 | * a) it's attached to a gendisk, and | |
48d9b0d4 | 271 | * b) the queue had IO stats enabled when this request was started |
c2553b58 | 272 | */ |
599d067d | 273 | static inline bool blk_do_io_stat(struct request *rq) |
fb8ec18c | 274 | { |
48d9b0d4 | 275 | return rq->rq_disk && (rq->rq_flags & RQF_IO_STAT); |
fb8ec18c JA |
276 | } |
277 | ||
6cf7677f CH |
278 | static inline void req_set_nomerge(struct request_queue *q, struct request *req) |
279 | { | |
280 | req->cmd_flags |= REQ_NOMERGE; | |
281 | if (req == q->last_merge) | |
282 | q->last_merge = NULL; | |
283 | } | |
284 | ||
1adfc5e4 ML |
285 | /* |
286 | * The max size one bio can handle is UINT_MAX becasue bvec_iter.bi_size | |
287 | * is defined as 'unsigned int', meantime it has to aligned to with logical | |
288 | * block size which is the minimum accepted unit by hardware. | |
289 | */ | |
290 | static inline unsigned int bio_allowed_max_sectors(struct request_queue *q) | |
291 | { | |
292 | return round_down(UINT_MAX, queue_logical_block_size(q)) >> 9; | |
293 | } | |
294 | ||
f2dbd76a TH |
295 | /* |
296 | * Internal io_context interface | |
297 | */ | |
298 | void get_io_context(struct io_context *ioc); | |
47fdd4ca | 299 | struct io_cq *ioc_lookup_icq(struct io_context *ioc, struct request_queue *q); |
24acfc34 TH |
300 | struct io_cq *ioc_create_icq(struct io_context *ioc, struct request_queue *q, |
301 | gfp_t gfp_mask); | |
7e5a8794 | 302 | void ioc_clear_queue(struct request_queue *q); |
f2dbd76a | 303 | |
24acfc34 | 304 | int create_task_io_context(struct task_struct *task, gfp_t gfp_mask, int node); |
f2dbd76a TH |
305 | |
306 | /** | |
307 | * create_io_context - try to create task->io_context | |
f2dbd76a TH |
308 | * @gfp_mask: allocation mask |
309 | * @node: allocation node | |
310 | * | |
24acfc34 TH |
311 | * If %current->io_context is %NULL, allocate a new io_context and install |
312 | * it. Returns the current %current->io_context which may be %NULL if | |
313 | * allocation failed. | |
f2dbd76a TH |
314 | * |
315 | * Note that this function can't be called with IRQ disabled because | |
24acfc34 | 316 | * task_lock which protects %current->io_context is IRQ-unsafe. |
f2dbd76a | 317 | */ |
24acfc34 | 318 | static inline struct io_context *create_io_context(gfp_t gfp_mask, int node) |
f2dbd76a TH |
319 | { |
320 | WARN_ON_ONCE(irqs_disabled()); | |
24acfc34 TH |
321 | if (unlikely(!current->io_context)) |
322 | create_task_io_context(current, gfp_mask, node); | |
323 | return current->io_context; | |
f2dbd76a TH |
324 | } |
325 | ||
326 | /* | |
327 | * Internal throttling interface | |
328 | */ | |
bc9fcbf9 | 329 | #ifdef CONFIG_BLK_DEV_THROTTLING |
c9a929dd | 330 | extern void blk_throtl_drain(struct request_queue *q); |
bc9fcbf9 TH |
331 | extern int blk_throtl_init(struct request_queue *q); |
332 | extern void blk_throtl_exit(struct request_queue *q); | |
d61fcfa4 | 333 | extern void blk_throtl_register_queue(struct request_queue *q); |
bc9fcbf9 | 334 | #else /* CONFIG_BLK_DEV_THROTTLING */ |
c9a929dd | 335 | static inline void blk_throtl_drain(struct request_queue *q) { } |
bc9fcbf9 TH |
336 | static inline int blk_throtl_init(struct request_queue *q) { return 0; } |
337 | static inline void blk_throtl_exit(struct request_queue *q) { } | |
d61fcfa4 | 338 | static inline void blk_throtl_register_queue(struct request_queue *q) { } |
bc9fcbf9 | 339 | #endif /* CONFIG_BLK_DEV_THROTTLING */ |
297e3d85 SL |
340 | #ifdef CONFIG_BLK_DEV_THROTTLING_LOW |
341 | extern ssize_t blk_throtl_sample_time_show(struct request_queue *q, char *page); | |
342 | extern ssize_t blk_throtl_sample_time_store(struct request_queue *q, | |
343 | const char *page, size_t count); | |
9e234eea | 344 | extern void blk_throtl_bio_endio(struct bio *bio); |
b9147dd1 | 345 | extern void blk_throtl_stat_add(struct request *rq, u64 time); |
9e234eea SL |
346 | #else |
347 | static inline void blk_throtl_bio_endio(struct bio *bio) { } | |
b9147dd1 | 348 | static inline void blk_throtl_stat_add(struct request *rq, u64 time) { } |
297e3d85 | 349 | #endif |
bc9fcbf9 | 350 | |
3bce016a CH |
351 | #ifdef CONFIG_BOUNCE |
352 | extern int init_emergency_isa_pool(void); | |
353 | extern void blk_queue_bounce(struct request_queue *q, struct bio **bio); | |
354 | #else | |
355 | static inline int init_emergency_isa_pool(void) | |
356 | { | |
357 | return 0; | |
358 | } | |
359 | static inline void blk_queue_bounce(struct request_queue *q, struct bio **bio) | |
360 | { | |
361 | } | |
362 | #endif /* CONFIG_BOUNCE */ | |
363 | ||
d7067512 JB |
364 | #ifdef CONFIG_BLK_CGROUP_IOLATENCY |
365 | extern int blk_iolatency_init(struct request_queue *q); | |
366 | #else | |
367 | static inline int blk_iolatency_init(struct request_queue *q) { return 0; } | |
368 | #endif | |
369 | ||
a2d6b3a2 DLM |
370 | struct bio *blk_next_bio(struct bio *bio, unsigned int nr_pages, gfp_t gfp); |
371 | ||
bf505456 DLM |
372 | #ifdef CONFIG_BLK_DEV_ZONED |
373 | void blk_queue_free_zone_bitmaps(struct request_queue *q); | |
374 | #else | |
375 | static inline void blk_queue_free_zone_bitmaps(struct request_queue *q) {} | |
376 | #endif | |
377 | ||
581e2600 CH |
378 | void part_dec_in_flight(struct request_queue *q, struct hd_struct *part, |
379 | int rw); | |
380 | void part_inc_in_flight(struct request_queue *q, struct hd_struct *part, | |
381 | int rw); | |
382 | void update_io_ticks(struct hd_struct *part, unsigned long now, bool end); | |
383 | struct hd_struct *disk_map_sector_rcu(struct gendisk *disk, sector_t sector); | |
384 | ||
385 | int blk_alloc_devt(struct hd_struct *part, dev_t *devt); | |
386 | void blk_free_devt(dev_t devt); | |
387 | void blk_invalidate_devt(dev_t devt); | |
388 | char *disk_name(struct gendisk *hd, int partno, char *buf); | |
389 | #define ADDPART_FLAG_NONE 0 | |
390 | #define ADDPART_FLAG_RAID 1 | |
391 | #define ADDPART_FLAG_WHOLEDISK 2 | |
392 | struct hd_struct *__must_check add_partition(struct gendisk *disk, int partno, | |
393 | sector_t start, sector_t len, int flags, | |
394 | struct partition_meta_info *info); | |
395 | void __delete_partition(struct percpu_ref *ref); | |
396 | void delete_partition(struct gendisk *disk, int partno); | |
397 | int disk_expand_part_tbl(struct gendisk *disk, int target); | |
398 | ||
399 | static inline int hd_ref_init(struct hd_struct *part) | |
400 | { | |
401 | if (percpu_ref_init(&part->ref, __delete_partition, 0, | |
402 | GFP_KERNEL)) | |
403 | return -ENOMEM; | |
404 | return 0; | |
405 | } | |
406 | ||
407 | static inline void hd_struct_get(struct hd_struct *part) | |
408 | { | |
409 | percpu_ref_get(&part->ref); | |
410 | } | |
411 | ||
412 | static inline int hd_struct_try_get(struct hd_struct *part) | |
413 | { | |
414 | return percpu_ref_tryget_live(&part->ref); | |
415 | } | |
416 | ||
417 | static inline void hd_struct_put(struct hd_struct *part) | |
418 | { | |
419 | percpu_ref_put(&part->ref); | |
420 | } | |
421 | ||
422 | static inline void hd_struct_kill(struct hd_struct *part) | |
423 | { | |
424 | percpu_ref_kill(&part->ref); | |
425 | } | |
426 | ||
427 | static inline void hd_free_part(struct hd_struct *part) | |
428 | { | |
429 | free_part_stats(part); | |
430 | kfree(part->info); | |
431 | percpu_ref_exit(&part->ref); | |
432 | } | |
433 | ||
434 | /* | |
435 | * Any access of part->nr_sects which is not protected by partition | |
436 | * bd_mutex or gendisk bdev bd_mutex, should be done using this | |
437 | * accessor function. | |
438 | * | |
439 | * Code written along the lines of i_size_read() and i_size_write(). | |
440 | * CONFIG_PREEMPTION case optimizes the case of UP kernel with preemption | |
441 | * on. | |
442 | */ | |
443 | static inline sector_t part_nr_sects_read(struct hd_struct *part) | |
444 | { | |
445 | #if BITS_PER_LONG==32 && defined(CONFIG_SMP) | |
446 | sector_t nr_sects; | |
447 | unsigned seq; | |
448 | do { | |
449 | seq = read_seqcount_begin(&part->nr_sects_seq); | |
450 | nr_sects = part->nr_sects; | |
451 | } while (read_seqcount_retry(&part->nr_sects_seq, seq)); | |
452 | return nr_sects; | |
453 | #elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPTION) | |
454 | sector_t nr_sects; | |
455 | ||
456 | preempt_disable(); | |
457 | nr_sects = part->nr_sects; | |
458 | preempt_enable(); | |
459 | return nr_sects; | |
460 | #else | |
461 | return part->nr_sects; | |
462 | #endif | |
463 | } | |
464 | ||
465 | /* | |
466 | * Should be called with mutex lock held (typically bd_mutex) of partition | |
467 | * to provide mutual exlusion among writers otherwise seqcount might be | |
468 | * left in wrong state leaving the readers spinning infinitely. | |
469 | */ | |
470 | static inline void part_nr_sects_write(struct hd_struct *part, sector_t size) | |
471 | { | |
472 | #if BITS_PER_LONG==32 && defined(CONFIG_SMP) | |
473 | write_seqcount_begin(&part->nr_sects_seq); | |
474 | part->nr_sects = size; | |
475 | write_seqcount_end(&part->nr_sects_seq); | |
476 | #elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPTION) | |
477 | preempt_disable(); | |
478 | part->nr_sects = size; | |
479 | preempt_enable(); | |
480 | #else | |
481 | part->nr_sects = size; | |
482 | #endif | |
483 | } | |
484 | ||
3d745ea5 CH |
485 | struct request_queue *__blk_alloc_queue(int node_id); |
486 | ||
130879f1 CH |
487 | int __bio_add_pc_page(struct request_queue *q, struct bio *bio, |
488 | struct page *page, unsigned int len, unsigned int offset, | |
489 | bool *same_page); | |
490 | ||
bc9fcbf9 | 491 | #endif /* BLK_INTERNAL_H */ |