blob: c483863b740adee564f9df12022fa13c9848050a [file] [log] [blame]
Thomas Gleixner2874c5f2019-05-27 08:55:01 +02001/* SPDX-License-Identifier: GPL-2.0-or-later */
David Howells06b3db12009-04-03 16:42:36 +01002/* Internal definitions for FS-Cache
3 *
4 * Copyright (C) 2004-2007 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
David Howells06b3db12009-04-03 16:42:36 +01006 */
7
8/*
9 * Lock order, in the order in which multiple locks should be obtained:
10 * - fscache_addremove_sem
11 * - cookie->lock
12 * - cookie->parent->lock
13 * - cache->object_list_lock
14 * - object->lock
15 * - object->parent->lock
David Howells1bccf512009-11-19 18:11:25 +000016 * - cookie->stores_lock
David Howells06b3db12009-04-03 16:42:36 +010017 * - fscache_thread_lock
18 *
19 */
20
Fabian Frederick36dfd112014-06-04 16:05:38 -070021#ifdef pr_fmt
22#undef pr_fmt
23#endif
24
25#define pr_fmt(fmt) "FS-Cache: " fmt
26
David Howells06b3db12009-04-03 16:42:36 +010027#include <linux/fscache-cache.h>
David Howellsa18feb52018-04-04 13:41:27 +010028#include <trace/events/fscache.h>
David Howells06b3db12009-04-03 16:42:36 +010029#include <linux/sched.h>
Christoph Hellwigfddda2b2018-04-13 19:44:18 +020030#include <linux/seq_file.h>
David Howells06b3db12009-04-03 16:42:36 +010031
32#define FSCACHE_MIN_THREADS 4
33#define FSCACHE_MAX_THREADS 32
34
35/*
David Howells348ca1022009-05-27 15:46:50 +010036 * cache.c
David Howells0e04d4c2009-04-03 16:42:37 +010037 */
38extern struct list_head fscache_cache_list;
39extern struct rw_semaphore fscache_addremove_sem;
40
41extern struct fscache_cache *fscache_select_cache_for_object(
42 struct fscache_cookie *);
43
44/*
David Howells348ca1022009-05-27 15:46:50 +010045 * cookie.c
David Howells955d00912009-04-03 16:42:38 +010046 */
47extern struct kmem_cache *fscache_cookie_jar;
48
David Howellsec0328e2018-04-04 13:41:28 +010049extern void fscache_free_cookie(struct fscache_cookie *);
David Howellsec0328e2018-04-04 13:41:28 +010050extern struct fscache_cookie *fscache_alloc_cookie(struct fscache_cookie *,
51 const struct fscache_cookie_def *,
52 const void *, size_t,
53 const void *, size_t,
54 void *, loff_t);
55extern struct fscache_cookie *fscache_hash_cookie(struct fscache_cookie *);
David Howellsa18feb52018-04-04 13:41:27 +010056extern void fscache_cookie_put(struct fscache_cookie *,
57 enum fscache_cookie_trace);
David Howells955d00912009-04-03 16:42:38 +010058
59/*
David Howells348ca1022009-05-27 15:46:50 +010060 * fsdef.c
David Howellsa6891642009-04-03 16:42:37 +010061 */
62extern struct fscache_cookie fscache_fsdef_index;
63extern struct fscache_cookie_def fscache_fsdef_netfs_def;
64
65/*
David Howells348ca1022009-05-27 15:46:50 +010066 * histogram.c
David Howells7394daa2009-04-03 16:42:37 +010067 */
68#ifdef CONFIG_FSCACHE_HISTOGRAM
69extern atomic_t fscache_obj_instantiate_histogram[HZ];
70extern atomic_t fscache_objs_histogram[HZ];
71extern atomic_t fscache_ops_histogram[HZ];
72extern atomic_t fscache_retrieval_delay_histogram[HZ];
73extern atomic_t fscache_retrieval_histogram[HZ];
74
75static inline void fscache_hist(atomic_t histogram[], unsigned long start_jif)
76{
77 unsigned long jif = jiffies - start_jif;
78 if (jif >= HZ)
79 jif = HZ - 1;
80 atomic_inc(&histogram[jif]);
81}
82
Christoph Hellwigfddda2b2018-04-13 19:44:18 +020083extern const struct seq_operations fscache_histogram_ops;
David Howells7394daa2009-04-03 16:42:37 +010084
85#else
86#define fscache_hist(hist, start_jif) do {} while (0)
87#endif
88
89/*
David Howells348ca1022009-05-27 15:46:50 +010090 * main.c
David Howells06b3db12009-04-03 16:42:36 +010091 */
92extern unsigned fscache_defer_lookup;
93extern unsigned fscache_defer_create;
94extern unsigned fscache_debug;
95extern struct kobject *fscache_root;
Tejun Heo8b8edef2010-07-20 22:09:01 +020096extern struct workqueue_struct *fscache_object_wq;
Tejun Heo8af7c122010-07-20 22:09:01 +020097extern struct workqueue_struct *fscache_op_wq;
Tejun Heo8b8edef2010-07-20 22:09:01 +020098DECLARE_PER_CPU(wait_queue_head_t, fscache_object_cong_wait);
99
100static inline bool fscache_object_congested(void)
101{
102 return workqueue_congested(WORK_CPU_UNBOUND, fscache_object_wq);
103}
David Howells06b3db12009-04-03 16:42:36 +0100104
David Howells7394daa2009-04-03 16:42:37 +0100105/*
David Howells348ca1022009-05-27 15:46:50 +0100106 * object.c
David Howells36c955902009-04-03 16:42:38 +0100107 */
David Howells36c955902009-04-03 16:42:38 +0100108extern void fscache_enqueue_object(struct fscache_object *);
109
110/*
David Howells4fbf4292009-11-19 18:11:04 +0000111 * object-list.c
112 */
113#ifdef CONFIG_FSCACHE_OBJECT_LIST
Alexey Dobriyan97a32532020-02-03 17:37:17 -0800114extern const struct proc_ops fscache_objlist_proc_ops;
David Howells4fbf4292009-11-19 18:11:04 +0000115
116extern void fscache_objlist_add(struct fscache_object *);
David Howells13627292013-05-10 19:50:26 +0100117extern void fscache_objlist_remove(struct fscache_object *);
David Howells4fbf4292009-11-19 18:11:04 +0000118#else
119#define fscache_objlist_add(object) do {} while(0)
David Howells13627292013-05-10 19:50:26 +0100120#define fscache_objlist_remove(object) do {} while(0)
David Howells4fbf4292009-11-19 18:11:04 +0000121#endif
122
123/*
David Howells348ca1022009-05-27 15:46:50 +0100124 * operation.c
David Howells36c955902009-04-03 16:42:38 +0100125 */
David Howells952efe72009-04-03 16:42:39 +0100126extern int fscache_submit_exclusive_op(struct fscache_object *,
127 struct fscache_operation *);
128extern int fscache_submit_op(struct fscache_object *,
129 struct fscache_operation *);
David Howellsd3b97ca2015-02-24 10:05:29 +0000130extern int fscache_cancel_op(struct fscache_operation *, bool);
David Howellsef778e72012-12-20 21:52:36 +0000131extern void fscache_cancel_all_ops(struct fscache_object *);
David Howells952efe72009-04-03 16:42:39 +0100132extern void fscache_abort_object(struct fscache_object *);
133extern void fscache_start_operations(struct fscache_object *);
134extern void fscache_operation_gc(struct work_struct *);
David Howells36c955902009-04-03 16:42:38 +0100135
136/*
David Howellsef778e72012-12-20 21:52:36 +0000137 * page.c
138 */
David Howellsda9803bc2013-08-21 17:29:38 -0400139extern int fscache_wait_for_deferred_lookup(struct fscache_cookie *);
140extern int fscache_wait_for_operation_activation(struct fscache_object *,
141 struct fscache_operation *,
142 atomic_t *,
David Howellsd3b97ca2015-02-24 10:05:29 +0000143 atomic_t *);
David Howellsef778e72012-12-20 21:52:36 +0000144extern void fscache_invalidate_writes(struct fscache_cookie *);
David Howells26aaeff2021-02-22 11:39:47 +0000145struct fscache_retrieval *fscache_alloc_retrieval(struct fscache_cookie *cookie,
146 struct address_space *mapping,
147 fscache_rw_complete_t end_io_func,
148 void *context);
David Howellsef778e72012-12-20 21:52:36 +0000149
150/*
David Howells348ca1022009-05-27 15:46:50 +0100151 * proc.c
David Howells7394daa2009-04-03 16:42:37 +0100152 */
153#ifdef CONFIG_PROC_FS
154extern int __init fscache_proc_init(void);
155extern void fscache_proc_cleanup(void);
156#else
157#define fscache_proc_init() (0)
158#define fscache_proc_cleanup() do {} while (0)
159#endif
160
161/*
David Howells348ca1022009-05-27 15:46:50 +0100162 * stats.c
David Howells7394daa2009-04-03 16:42:37 +0100163 */
164#ifdef CONFIG_FSCACHE_STATS
165extern atomic_t fscache_n_ops_processed[FSCACHE_MAX_THREADS];
166extern atomic_t fscache_n_objs_processed[FSCACHE_MAX_THREADS];
167
168extern atomic_t fscache_n_op_pend;
169extern atomic_t fscache_n_op_run;
170extern atomic_t fscache_n_op_enqueue;
171extern atomic_t fscache_n_op_deferred_release;
David Howells03cdd0e2015-02-25 13:21:15 +0000172extern atomic_t fscache_n_op_initialised;
David Howells7394daa2009-04-03 16:42:37 +0100173extern atomic_t fscache_n_op_release;
174extern atomic_t fscache_n_op_gc;
David Howells5753c442009-11-19 18:11:19 +0000175extern atomic_t fscache_n_op_cancelled;
David Howellse3d4d282009-11-19 18:11:32 +0000176extern atomic_t fscache_n_op_rejected;
David Howells7394daa2009-04-03 16:42:37 +0100177
178extern atomic_t fscache_n_attr_changed;
179extern atomic_t fscache_n_attr_changed_ok;
180extern atomic_t fscache_n_attr_changed_nobufs;
181extern atomic_t fscache_n_attr_changed_nomem;
182extern atomic_t fscache_n_attr_changed_calls;
183
184extern atomic_t fscache_n_allocs;
185extern atomic_t fscache_n_allocs_ok;
186extern atomic_t fscache_n_allocs_wait;
187extern atomic_t fscache_n_allocs_nobufs;
David Howells5753c442009-11-19 18:11:19 +0000188extern atomic_t fscache_n_allocs_intr;
David Howells60d543c2009-11-19 18:11:45 +0000189extern atomic_t fscache_n_allocs_object_dead;
David Howells7394daa2009-04-03 16:42:37 +0100190extern atomic_t fscache_n_alloc_ops;
191extern atomic_t fscache_n_alloc_op_waits;
192
193extern atomic_t fscache_n_retrievals;
194extern atomic_t fscache_n_retrievals_ok;
195extern atomic_t fscache_n_retrievals_wait;
196extern atomic_t fscache_n_retrievals_nodata;
197extern atomic_t fscache_n_retrievals_nobufs;
198extern atomic_t fscache_n_retrievals_intr;
199extern atomic_t fscache_n_retrievals_nomem;
David Howells60d543c2009-11-19 18:11:45 +0000200extern atomic_t fscache_n_retrievals_object_dead;
David Howells7394daa2009-04-03 16:42:37 +0100201extern atomic_t fscache_n_retrieval_ops;
202extern atomic_t fscache_n_retrieval_op_waits;
203
204extern atomic_t fscache_n_stores;
205extern atomic_t fscache_n_stores_ok;
206extern atomic_t fscache_n_stores_again;
207extern atomic_t fscache_n_stores_nobufs;
208extern atomic_t fscache_n_stores_oom;
209extern atomic_t fscache_n_store_ops;
210extern atomic_t fscache_n_store_calls;
David Howells1bccf512009-11-19 18:11:25 +0000211extern atomic_t fscache_n_store_pages;
212extern atomic_t fscache_n_store_radix_deletes;
213extern atomic_t fscache_n_store_pages_over_limit;
David Howells7394daa2009-04-03 16:42:37 +0100214
David Howells201a1542009-11-19 18:11:35 +0000215extern atomic_t fscache_n_store_vmscan_not_storing;
216extern atomic_t fscache_n_store_vmscan_gone;
217extern atomic_t fscache_n_store_vmscan_busy;
218extern atomic_t fscache_n_store_vmscan_cancelled;
David Howells8c209ce2012-12-05 13:34:49 +0000219extern atomic_t fscache_n_store_vmscan_wait;
David Howells201a1542009-11-19 18:11:35 +0000220
David Howells7394daa2009-04-03 16:42:37 +0100221extern atomic_t fscache_n_marks;
222extern atomic_t fscache_n_uncaches;
223
224extern atomic_t fscache_n_acquires;
225extern atomic_t fscache_n_acquires_null;
226extern atomic_t fscache_n_acquires_no_cache;
227extern atomic_t fscache_n_acquires_ok;
228extern atomic_t fscache_n_acquires_nobufs;
229extern atomic_t fscache_n_acquires_oom;
230
David Howellsef778e72012-12-20 21:52:36 +0000231extern atomic_t fscache_n_invalidates;
232extern atomic_t fscache_n_invalidates_run;
233
David Howells7394daa2009-04-03 16:42:37 +0100234extern atomic_t fscache_n_updates;
235extern atomic_t fscache_n_updates_null;
236extern atomic_t fscache_n_updates_run;
237
238extern atomic_t fscache_n_relinquishes;
239extern atomic_t fscache_n_relinquishes_null;
240extern atomic_t fscache_n_relinquishes_waitcrt;
David Howells2175bb02009-11-19 18:11:38 +0000241extern atomic_t fscache_n_relinquishes_retire;
David Howells7394daa2009-04-03 16:42:37 +0100242
243extern atomic_t fscache_n_cookie_index;
244extern atomic_t fscache_n_cookie_data;
245extern atomic_t fscache_n_cookie_special;
246
247extern atomic_t fscache_n_object_alloc;
248extern atomic_t fscache_n_object_no_alloc;
249extern atomic_t fscache_n_object_lookups;
250extern atomic_t fscache_n_object_lookups_negative;
251extern atomic_t fscache_n_object_lookups_positive;
David Howellsfee096d2009-11-19 18:12:05 +0000252extern atomic_t fscache_n_object_lookups_timed_out;
David Howells7394daa2009-04-03 16:42:37 +0100253extern atomic_t fscache_n_object_created;
254extern atomic_t fscache_n_object_avail;
255extern atomic_t fscache_n_object_dead;
256
257extern atomic_t fscache_n_checkaux_none;
258extern atomic_t fscache_n_checkaux_okay;
259extern atomic_t fscache_n_checkaux_update;
260extern atomic_t fscache_n_checkaux_obsolete;
261
David Howells52bd75f2009-11-19 18:11:08 +0000262extern atomic_t fscache_n_cop_alloc_object;
263extern atomic_t fscache_n_cop_lookup_object;
264extern atomic_t fscache_n_cop_lookup_complete;
265extern atomic_t fscache_n_cop_grab_object;
David Howellsef778e72012-12-20 21:52:36 +0000266extern atomic_t fscache_n_cop_invalidate_object;
David Howells52bd75f2009-11-19 18:11:08 +0000267extern atomic_t fscache_n_cop_update_object;
268extern atomic_t fscache_n_cop_drop_object;
269extern atomic_t fscache_n_cop_put_object;
270extern atomic_t fscache_n_cop_sync_cache;
271extern atomic_t fscache_n_cop_attr_changed;
272extern atomic_t fscache_n_cop_read_or_alloc_page;
273extern atomic_t fscache_n_cop_read_or_alloc_pages;
274extern atomic_t fscache_n_cop_allocate_page;
275extern atomic_t fscache_n_cop_allocate_pages;
276extern atomic_t fscache_n_cop_write_page;
277extern atomic_t fscache_n_cop_uncache_page;
278extern atomic_t fscache_n_cop_dissociate_pages;
279
David Howells182d9192015-02-19 23:47:31 +0000280extern atomic_t fscache_n_cache_no_space_reject;
281extern atomic_t fscache_n_cache_stale_objects;
282extern atomic_t fscache_n_cache_retired_objects;
283extern atomic_t fscache_n_cache_culled_objects;
284
David Howells7394daa2009-04-03 16:42:37 +0100285static inline void fscache_stat(atomic_t *stat)
286{
287 atomic_inc(stat);
288}
289
David Howells52bd75f2009-11-19 18:11:08 +0000290static inline void fscache_stat_d(atomic_t *stat)
291{
292 atomic_dec(stat);
293}
294
David Howells60d543c2009-11-19 18:11:45 +0000295#define __fscache_stat(stat) (stat)
296
Christoph Hellwig3f3942a2018-05-15 15:57:23 +0200297int fscache_stats_show(struct seq_file *m, void *v);
David Howells7394daa2009-04-03 16:42:37 +0100298#else
299
David Howells60d543c2009-11-19 18:11:45 +0000300#define __fscache_stat(stat) (NULL)
David Howells7394daa2009-04-03 16:42:37 +0100301#define fscache_stat(stat) do {} while (0)
David Howells4fa9f4e2009-11-20 21:50:44 +0000302#define fscache_stat_d(stat) do {} while (0)
David Howells7394daa2009-04-03 16:42:37 +0100303#endif
304
David Howells0e04d4c2009-04-03 16:42:37 +0100305/*
306 * raise an event on an object
307 * - if the event is not masked for that object, then the object is
308 * queued for attention by the thread pool.
309 */
310static inline void fscache_raise_event(struct fscache_object *object,
311 unsigned event)
312{
David Howells8d763492012-12-05 13:34:48 +0000313 BUG_ON(event >= NR_FSCACHE_OBJECT_EVENTS);
David Howellscaaef692013-05-10 19:50:26 +0100314#if 0
315 printk("*** fscache_raise_event(OBJ%d{%lx},%x)\n",
316 object->debug_id, object->event_mask, (1 << event));
317#endif
David Howells36c955902009-04-03 16:42:38 +0100318 if (!test_and_set_bit(event, &object->events) &&
319 test_bit(event, &object->event_mask))
320 fscache_enqueue_object(object);
321}
322
David Howellsa18feb52018-04-04 13:41:27 +0100323static inline void fscache_cookie_get(struct fscache_cookie *cookie,
324 enum fscache_cookie_trace where)
David Howells36c955902009-04-03 16:42:38 +0100325{
David Howellsa18feb52018-04-04 13:41:27 +0100326 int usage = atomic_inc_return(&cookie->usage);
327
328 trace_fscache_cookie(cookie, where, usage);
David Howells0e04d4c2009-04-03 16:42:37 +0100329}
330
David Howellsb5108822009-04-03 16:42:39 +0100331/*
332 * get an extra reference to a netfs retrieval context
333 */
334static inline
335void *fscache_get_context(struct fscache_cookie *cookie, void *context)
336{
337 if (cookie->def->get_context)
338 cookie->def->get_context(cookie->netfs_data, context);
339 return context;
340}
341
342/*
343 * release a reference to a netfs retrieval context
344 */
345static inline
346void fscache_put_context(struct fscache_cookie *cookie, void *context)
347{
348 if (cookie->def->put_context)
349 cookie->def->put_context(cookie->netfs_data, context);
350}
351
David Howells402cb8d2018-04-04 13:41:28 +0100352/*
353 * Update the auxiliary data on a cookie.
354 */
355static inline
356void fscache_update_aux(struct fscache_cookie *cookie, const void *aux_data)
357{
358 void *p;
359
360 if (!aux_data)
361 return;
362 if (cookie->aux_len <= sizeof(cookie->inline_aux))
363 p = cookie->inline_aux;
364 else
365 p = cookie->aux;
366
367 if (memcmp(p, aux_data, cookie->aux_len) != 0) {
368 memcpy(p, aux_data, cookie->aux_len);
369 set_bit(FSCACHE_COOKIE_AUX_UPDATED, &cookie->flags);
370 }
371}
372
David Howells06b3db12009-04-03 16:42:36 +0100373/*****************************************************************************/
374/*
375 * debug tracing
376 */
377#define dbgprintk(FMT, ...) \
378 printk(KERN_DEBUG "[%-6.6s] "FMT"\n", current->comm, ##__VA_ARGS__)
379
David Howells06b3db12009-04-03 16:42:36 +0100380#define kenter(FMT, ...) dbgprintk("==> %s("FMT")", __func__, ##__VA_ARGS__)
381#define kleave(FMT, ...) dbgprintk("<== %s()"FMT"", __func__, ##__VA_ARGS__)
382#define kdebug(FMT, ...) dbgprintk(FMT, ##__VA_ARGS__)
383
David Howells12fdff32010-08-12 16:54:57 +0100384#define kjournal(FMT, ...) no_printk(FMT, ##__VA_ARGS__)
David Howells06b3db12009-04-03 16:42:36 +0100385
386#ifdef __KDEBUG
387#define _enter(FMT, ...) kenter(FMT, ##__VA_ARGS__)
388#define _leave(FMT, ...) kleave(FMT, ##__VA_ARGS__)
389#define _debug(FMT, ...) kdebug(FMT, ##__VA_ARGS__)
390
391#elif defined(CONFIG_FSCACHE_DEBUG)
392#define _enter(FMT, ...) \
393do { \
394 if (__do_kdebug(ENTER)) \
395 kenter(FMT, ##__VA_ARGS__); \
396} while (0)
397
398#define _leave(FMT, ...) \
399do { \
400 if (__do_kdebug(LEAVE)) \
401 kleave(FMT, ##__VA_ARGS__); \
402} while (0)
403
404#define _debug(FMT, ...) \
405do { \
406 if (__do_kdebug(DEBUG)) \
407 kdebug(FMT, ##__VA_ARGS__); \
408} while (0)
409
410#else
David Howells12fdff32010-08-12 16:54:57 +0100411#define _enter(FMT, ...) no_printk("==> %s("FMT")", __func__, ##__VA_ARGS__)
412#define _leave(FMT, ...) no_printk("<== %s()"FMT"", __func__, ##__VA_ARGS__)
413#define _debug(FMT, ...) no_printk(FMT, ##__VA_ARGS__)
David Howells06b3db12009-04-03 16:42:36 +0100414#endif
415
416/*
417 * determine whether a particular optional debugging point should be logged
418 * - we need to go through three steps to persuade cpp to correctly join the
419 * shorthand in FSCACHE_DEBUG_LEVEL with its prefix
420 */
421#define ____do_kdebug(LEVEL, POINT) \
422 unlikely((fscache_debug & \
423 (FSCACHE_POINT_##POINT << (FSCACHE_DEBUG_ ## LEVEL * 3))))
424#define ___do_kdebug(LEVEL, POINT) \
425 ____do_kdebug(LEVEL, POINT)
426#define __do_kdebug(POINT) \
427 ___do_kdebug(FSCACHE_DEBUG_LEVEL, POINT)
428
429#define FSCACHE_DEBUG_CACHE 0
430#define FSCACHE_DEBUG_COOKIE 1
431#define FSCACHE_DEBUG_PAGE 2
432#define FSCACHE_DEBUG_OPERATION 3
433
434#define FSCACHE_POINT_ENTER 1
435#define FSCACHE_POINT_LEAVE 2
436#define FSCACHE_POINT_DEBUG 4
437
438#ifndef FSCACHE_DEBUG_LEVEL
439#define FSCACHE_DEBUG_LEVEL CACHE
440#endif
441
442/*
443 * assertions
444 */
445#if 1 /* defined(__KDEBUGALL) */
446
447#define ASSERT(X) \
448do { \
449 if (unlikely(!(X))) { \
Fabian Frederick36dfd112014-06-04 16:05:38 -0700450 pr_err("\n"); \
451 pr_err("Assertion failed\n"); \
David Howells06b3db12009-04-03 16:42:36 +0100452 BUG(); \
453 } \
454} while (0)
455
456#define ASSERTCMP(X, OP, Y) \
457do { \
458 if (unlikely(!((X) OP (Y)))) { \
Fabian Frederick36dfd112014-06-04 16:05:38 -0700459 pr_err("\n"); \
460 pr_err("Assertion failed\n"); \
461 pr_err("%lx " #OP " %lx is false\n", \
David Howells06b3db12009-04-03 16:42:36 +0100462 (unsigned long)(X), (unsigned long)(Y)); \
463 BUG(); \
464 } \
465} while (0)
466
467#define ASSERTIF(C, X) \
468do { \
469 if (unlikely((C) && !(X))) { \
Fabian Frederick36dfd112014-06-04 16:05:38 -0700470 pr_err("\n"); \
471 pr_err("Assertion failed\n"); \
David Howells06b3db12009-04-03 16:42:36 +0100472 BUG(); \
473 } \
474} while (0)
475
476#define ASSERTIFCMP(C, X, OP, Y) \
477do { \
478 if (unlikely((C) && !((X) OP (Y)))) { \
Fabian Frederick36dfd112014-06-04 16:05:38 -0700479 pr_err("\n"); \
480 pr_err("Assertion failed\n"); \
481 pr_err("%lx " #OP " %lx is false\n", \
David Howells06b3db12009-04-03 16:42:36 +0100482 (unsigned long)(X), (unsigned long)(Y)); \
483 BUG(); \
484 } \
485} while (0)
486
487#else
488
489#define ASSERT(X) do {} while (0)
490#define ASSERTCMP(X, OP, Y) do {} while (0)
491#define ASSERTIF(C, X) do {} while (0)
492#define ASSERTIFCMP(C, X, OP, Y) do {} while (0)
493
494#endif /* assert or not */