diff options
Diffstat (limited to 'lib/debugobjects.c')
| -rw-r--r-- | lib/debugobjects.c | 75 |
1 files changed, 38 insertions, 37 deletions
diff --git a/lib/debugobjects.c b/lib/debugobjects.c index eae56fddfa3b..b862b30369ff 100644 --- a/lib/debugobjects.c +++ b/lib/debugobjects.c | |||
| @@ -12,6 +12,7 @@ | |||
| 12 | #include <linux/sched.h> | 12 | #include <linux/sched.h> |
| 13 | #include <linux/seq_file.h> | 13 | #include <linux/seq_file.h> |
| 14 | #include <linux/debugfs.h> | 14 | #include <linux/debugfs.h> |
| 15 | #include <linux/slab.h> | ||
| 15 | #include <linux/hash.h> | 16 | #include <linux/hash.h> |
| 16 | 17 | ||
| 17 | #define ODEBUG_HASH_BITS 14 | 18 | #define ODEBUG_HASH_BITS 14 |
| @@ -26,14 +27,14 @@ | |||
| 26 | 27 | ||
| 27 | struct debug_bucket { | 28 | struct debug_bucket { |
| 28 | struct hlist_head list; | 29 | struct hlist_head list; |
| 29 | spinlock_t lock; | 30 | raw_spinlock_t lock; |
| 30 | }; | 31 | }; |
| 31 | 32 | ||
| 32 | static struct debug_bucket obj_hash[ODEBUG_HASH_SIZE]; | 33 | static struct debug_bucket obj_hash[ODEBUG_HASH_SIZE]; |
| 33 | 34 | ||
| 34 | static struct debug_obj obj_static_pool[ODEBUG_POOL_SIZE] __initdata; | 35 | static struct debug_obj obj_static_pool[ODEBUG_POOL_SIZE] __initdata; |
| 35 | 36 | ||
| 36 | static DEFINE_SPINLOCK(pool_lock); | 37 | static DEFINE_RAW_SPINLOCK(pool_lock); |
| 37 | 38 | ||
| 38 | static HLIST_HEAD(obj_pool); | 39 | static HLIST_HEAD(obj_pool); |
| 39 | 40 | ||
| @@ -96,10 +97,10 @@ static int fill_pool(void) | |||
| 96 | if (!new) | 97 | if (!new) |
| 97 | return obj_pool_free; | 98 | return obj_pool_free; |
| 98 | 99 | ||
| 99 | spin_lock_irqsave(&pool_lock, flags); | 100 | raw_spin_lock_irqsave(&pool_lock, flags); |
| 100 | hlist_add_head(&new->node, &obj_pool); | 101 | hlist_add_head(&new->node, &obj_pool); |
| 101 | obj_pool_free++; | 102 | obj_pool_free++; |
| 102 | spin_unlock_irqrestore(&pool_lock, flags); | 103 | raw_spin_unlock_irqrestore(&pool_lock, flags); |
| 103 | } | 104 | } |
| 104 | return obj_pool_free; | 105 | return obj_pool_free; |
| 105 | } | 106 | } |
| @@ -133,7 +134,7 @@ alloc_object(void *addr, struct debug_bucket *b, struct debug_obj_descr *descr) | |||
| 133 | { | 134 | { |
| 134 | struct debug_obj *obj = NULL; | 135 | struct debug_obj *obj = NULL; |
| 135 | 136 | ||
| 136 | spin_lock(&pool_lock); | 137 | raw_spin_lock(&pool_lock); |
| 137 | if (obj_pool.first) { | 138 | if (obj_pool.first) { |
| 138 | obj = hlist_entry(obj_pool.first, typeof(*obj), node); | 139 | obj = hlist_entry(obj_pool.first, typeof(*obj), node); |
| 139 | 140 | ||
| @@ -152,7 +153,7 @@ alloc_object(void *addr, struct debug_bucket *b, struct debug_obj_descr *descr) | |||
| 152 | if (obj_pool_free < obj_pool_min_free) | 153 | if (obj_pool_free < obj_pool_min_free) |
| 153 | obj_pool_min_free = obj_pool_free; | 154 | obj_pool_min_free = obj_pool_free; |
| 154 | } | 155 | } |
| 155 | spin_unlock(&pool_lock); | 156 | raw_spin_unlock(&pool_lock); |
| 156 | 157 | ||
| 157 | return obj; | 158 | return obj; |
| 158 | } | 159 | } |
| @@ -165,7 +166,7 @@ static void free_obj_work(struct work_struct *work) | |||
| 165 | struct debug_obj *obj; | 166 | struct debug_obj *obj; |
| 166 | unsigned long flags; | 167 | unsigned long flags; |
| 167 | 168 | ||
| 168 | spin_lock_irqsave(&pool_lock, flags); | 169 | raw_spin_lock_irqsave(&pool_lock, flags); |
| 169 | while (obj_pool_free > ODEBUG_POOL_SIZE) { | 170 | while (obj_pool_free > ODEBUG_POOL_SIZE) { |
| 170 | obj = hlist_entry(obj_pool.first, typeof(*obj), node); | 171 | obj = hlist_entry(obj_pool.first, typeof(*obj), node); |
| 171 | hlist_del(&obj->node); | 172 | hlist_del(&obj->node); |
| @@ -174,11 +175,11 @@ static void free_obj_work(struct work_struct *work) | |||
| 174 | * We release pool_lock across kmem_cache_free() to | 175 | * We release pool_lock across kmem_cache_free() to |
| 175 | * avoid contention on pool_lock. | 176 | * avoid contention on pool_lock. |
| 176 | */ | 177 | */ |
| 177 | spin_unlock_irqrestore(&pool_lock, flags); | 178 | raw_spin_unlock_irqrestore(&pool_lock, flags); |
| 178 | kmem_cache_free(obj_cache, obj); | 179 | kmem_cache_free(obj_cache, obj); |
| 179 | spin_lock_irqsave(&pool_lock, flags); | 180 | raw_spin_lock_irqsave(&pool_lock, flags); |
| 180 | } | 181 | } |
| 181 | spin_unlock_irqrestore(&pool_lock, flags); | 182 | raw_spin_unlock_irqrestore(&pool_lock, flags); |
| 182 | } | 183 | } |
| 183 | 184 | ||
| 184 | /* | 185 | /* |
| @@ -190,7 +191,7 @@ static void free_object(struct debug_obj *obj) | |||
| 190 | unsigned long flags; | 191 | unsigned long flags; |
| 191 | int sched = 0; | 192 | int sched = 0; |
| 192 | 193 | ||
| 193 | spin_lock_irqsave(&pool_lock, flags); | 194 | raw_spin_lock_irqsave(&pool_lock, flags); |
| 194 | /* | 195 | /* |
| 195 | * schedule work when the pool is filled and the cache is | 196 | * schedule work when the pool is filled and the cache is |
| 196 | * initialized: | 197 | * initialized: |
| @@ -200,7 +201,7 @@ static void free_object(struct debug_obj *obj) | |||
| 200 | hlist_add_head(&obj->node, &obj_pool); | 201 | hlist_add_head(&obj->node, &obj_pool); |
| 201 | obj_pool_free++; | 202 | obj_pool_free++; |
| 202 | obj_pool_used--; | 203 | obj_pool_used--; |
| 203 | spin_unlock_irqrestore(&pool_lock, flags); | 204 | raw_spin_unlock_irqrestore(&pool_lock, flags); |
| 204 | if (sched) | 205 | if (sched) |
| 205 | schedule_work(&debug_obj_work); | 206 | schedule_work(&debug_obj_work); |
| 206 | } | 207 | } |
| @@ -221,9 +222,9 @@ static void debug_objects_oom(void) | |||
| 221 | printk(KERN_WARNING "ODEBUG: Out of memory. ODEBUG disabled\n"); | 222 | printk(KERN_WARNING "ODEBUG: Out of memory. ODEBUG disabled\n"); |
| 222 | 223 | ||
| 223 | for (i = 0; i < ODEBUG_HASH_SIZE; i++, db++) { | 224 | for (i = 0; i < ODEBUG_HASH_SIZE; i++, db++) { |
| 224 | spin_lock_irqsave(&db->lock, flags); | 225 | raw_spin_lock_irqsave(&db->lock, flags); |
| 225 | hlist_move_list(&db->list, &freelist); | 226 | hlist_move_list(&db->list, &freelist); |
| 226 | spin_unlock_irqrestore(&db->lock, flags); | 227 | raw_spin_unlock_irqrestore(&db->lock, flags); |
| 227 | 228 | ||
| 228 | /* Now free them */ | 229 | /* Now free them */ |
| 229 | hlist_for_each_entry_safe(obj, node, tmp, &freelist, node) { | 230 | hlist_for_each_entry_safe(obj, node, tmp, &freelist, node) { |
| @@ -303,14 +304,14 @@ __debug_object_init(void *addr, struct debug_obj_descr *descr, int onstack) | |||
| 303 | 304 | ||
| 304 | db = get_bucket((unsigned long) addr); | 305 | db = get_bucket((unsigned long) addr); |
| 305 | 306 | ||
| 306 | spin_lock_irqsave(&db->lock, flags); | 307 | raw_spin_lock_irqsave(&db->lock, flags); |
| 307 | 308 | ||
| 308 | obj = lookup_object(addr, db); | 309 | obj = lookup_object(addr, db); |
| 309 | if (!obj) { | 310 | if (!obj) { |
| 310 | obj = alloc_object(addr, db, descr); | 311 | obj = alloc_object(addr, db, descr); |
| 311 | if (!obj) { | 312 | if (!obj) { |
| 312 | debug_objects_enabled = 0; | 313 | debug_objects_enabled = 0; |
| 313 | spin_unlock_irqrestore(&db->lock, flags); | 314 | raw_spin_unlock_irqrestore(&db->lock, flags); |
| 314 | debug_objects_oom(); | 315 | debug_objects_oom(); |
| 315 | return; | 316 | return; |
| 316 | } | 317 | } |
| @@ -327,7 +328,7 @@ __debug_object_init(void *addr, struct debug_obj_descr *descr, int onstack) | |||
| 327 | case ODEBUG_STATE_ACTIVE: | 328 | case ODEBUG_STATE_ACTIVE: |
| 328 | debug_print_object(obj, "init"); | 329 | debug_print_object(obj, "init"); |
| 329 | state = obj->state; | 330 | state = obj->state; |
| 330 | spin_unlock_irqrestore(&db->lock, flags); | 331 | raw_spin_unlock_irqrestore(&db->lock, flags); |
| 331 | debug_object_fixup(descr->fixup_init, addr, state); | 332 | debug_object_fixup(descr->fixup_init, addr, state); |
| 332 | return; | 333 | return; |
| 333 | 334 | ||
| @@ -338,7 +339,7 @@ __debug_object_init(void *addr, struct debug_obj_descr *descr, int onstack) | |||
| 338 | break; | 339 | break; |
| 339 | } | 340 | } |
| 340 | 341 | ||
| 341 | spin_unlock_irqrestore(&db->lock, flags); | 342 | raw_spin_unlock_irqrestore(&db->lock, flags); |
| 342 | } | 343 | } |
| 343 | 344 | ||
| 344 | /** | 345 | /** |
| @@ -385,7 +386,7 @@ void debug_object_activate(void *addr, struct debug_obj_descr *descr) | |||
| 385 | 386 | ||
| 386 | db = get_bucket((unsigned long) addr); | 387 | db = get_bucket((unsigned long) addr); |
| 387 | 388 | ||
| 388 | spin_lock_irqsave(&db->lock, flags); | 389 | raw_spin_lock_irqsave(&db->lock, flags); |
| 389 | 390 | ||
| 390 | obj = lookup_object(addr, db); | 391 | obj = lookup_object(addr, db); |
| 391 | if (obj) { | 392 | if (obj) { |
| @@ -398,7 +399,7 @@ void debug_object_activate(void *addr, struct debug_obj_descr *descr) | |||
| 398 | case ODEBUG_STATE_ACTIVE: | 399 | case ODEBUG_STATE_ACTIVE: |
| 399 | debug_print_object(obj, "activate"); | 400 | debug_print_object(obj, "activate"); |
| 400 | state = obj->state; | 401 | state = obj->state; |
| 401 | spin_unlock_irqrestore(&db->lock, flags); | 402 | raw_spin_unlock_irqrestore(&db->lock, flags); |
| 402 | debug_object_fixup(descr->fixup_activate, addr, state); | 403 | debug_object_fixup(descr->fixup_activate, addr, state); |
| 403 | return; | 404 | return; |
| 404 | 405 | ||
| @@ -408,11 +409,11 @@ void debug_object_activate(void *addr, struct debug_obj_descr *descr) | |||
| 408 | default: | 409 | default: |
| 409 | break; | 410 | break; |
| 410 | } | 411 | } |
| 411 | spin_unlock_irqrestore(&db->lock, flags); | 412 | raw_spin_unlock_irqrestore(&db->lock, flags); |
| 412 | return; | 413 | return; |
| 413 | } | 414 | } |
| 414 | 415 | ||
| 415 | spin_unlock_irqrestore(&db->lock, flags); | 416 | raw_spin_unlock_irqrestore(&db->lock, flags); |
| 416 | /* | 417 | /* |
| 417 | * This happens when a static object is activated. We | 418 | * This happens when a static object is activated. We |
| 418 | * let the type specific code decide whether this is | 419 | * let the type specific code decide whether this is |
| @@ -438,7 +439,7 @@ void debug_object_deactivate(void *addr, struct debug_obj_descr *descr) | |||
| 438 | 439 | ||
| 439 | db = get_bucket((unsigned long) addr); | 440 | db = get_bucket((unsigned long) addr); |
| 440 | 441 | ||
| 441 | spin_lock_irqsave(&db->lock, flags); | 442 | raw_spin_lock_irqsave(&db->lock, flags); |
| 442 | 443 | ||
| 443 | obj = lookup_object(addr, db); | 444 | obj = lookup_object(addr, db); |
| 444 | if (obj) { | 445 | if (obj) { |
| @@ -463,7 +464,7 @@ void debug_object_deactivate(void *addr, struct debug_obj_descr *descr) | |||
| 463 | debug_print_object(&o, "deactivate"); | 464 | debug_print_object(&o, "deactivate"); |
| 464 | } | 465 | } |
| 465 | 466 | ||
| 466 | spin_unlock_irqrestore(&db->lock, flags); | 467 | raw_spin_unlock_irqrestore(&db->lock, flags); |
| 467 | } | 468 | } |
| 468 | 469 | ||
| 469 | /** | 470 | /** |
| @@ -483,7 +484,7 @@ void debug_object_destroy(void *addr, struct debug_obj_descr *descr) | |||
| 483 | 484 | ||
| 484 | db = get_bucket((unsigned long) addr); | 485 | db = get_bucket((unsigned long) addr); |
| 485 | 486 | ||
| 486 | spin_lock_irqsave(&db->lock, flags); | 487 | raw_spin_lock_irqsave(&db->lock, flags); |
| 487 | 488 | ||
| 488 | obj = lookup_object(addr, db); | 489 | obj = lookup_object(addr, db); |
| 489 | if (!obj) | 490 | if (!obj) |
| @@ -498,7 +499,7 @@ void debug_object_destroy(void *addr, struct debug_obj_descr *descr) | |||
| 498 | case ODEBUG_STATE_ACTIVE: | 499 | case ODEBUG_STATE_ACTIVE: |
| 499 | debug_print_object(obj, "destroy"); | 500 | debug_print_object(obj, "destroy"); |
| 500 | state = obj->state; | 501 | state = obj->state; |
| 501 | spin_unlock_irqrestore(&db->lock, flags); | 502 | raw_spin_unlock_irqrestore(&db->lock, flags); |
| 502 | debug_object_fixup(descr->fixup_destroy, addr, state); | 503 | debug_object_fixup(descr->fixup_destroy, addr, state); |
| 503 | return; | 504 | return; |
| 504 | 505 | ||
| @@ -509,7 +510,7 @@ void debug_object_destroy(void *addr, struct debug_obj_descr *descr) | |||
| 509 | break; | 510 | break; |
| 510 | } | 511 | } |
| 511 | out_unlock: | 512 | out_unlock: |
| 512 | spin_unlock_irqrestore(&db->lock, flags); | 513 | raw_spin_unlock_irqrestore(&db->lock, flags); |
| 513 | } | 514 | } |
| 514 | 515 | ||
| 515 | /** | 516 | /** |
| @@ -529,7 +530,7 @@ void debug_object_free(void *addr, struct debug_obj_descr *descr) | |||
| 529 | 530 | ||
| 530 | db = get_bucket((unsigned long) addr); | 531 | db = get_bucket((unsigned long) addr); |
| 531 | 532 | ||
| 532 | spin_lock_irqsave(&db->lock, flags); | 533 | raw_spin_lock_irqsave(&db->lock, flags); |
| 533 | 534 | ||
| 534 | obj = lookup_object(addr, db); | 535 | obj = lookup_object(addr, db); |
| 535 | if (!obj) | 536 | if (!obj) |
| @@ -539,17 +540,17 @@ void debug_object_free(void *addr, struct debug_obj_descr *descr) | |||
| 539 | case ODEBUG_STATE_ACTIVE: | 540 | case ODEBUG_STATE_ACTIVE: |
| 540 | debug_print_object(obj, "free"); | 541 | debug_print_object(obj, "free"); |
| 541 | state = obj->state; | 542 | state = obj->state; |
| 542 | spin_unlock_irqrestore(&db->lock, flags); | 543 | raw_spin_unlock_irqrestore(&db->lock, flags); |
| 543 | debug_object_fixup(descr->fixup_free, addr, state); | 544 | debug_object_fixup(descr->fixup_free, addr, state); |
| 544 | return; | 545 | return; |
| 545 | default: | 546 | default: |
| 546 | hlist_del(&obj->node); | 547 | hlist_del(&obj->node); |
| 547 | spin_unlock_irqrestore(&db->lock, flags); | 548 | raw_spin_unlock_irqrestore(&db->lock, flags); |
| 548 | free_object(obj); | 549 | free_object(obj); |
| 549 | return; | 550 | return; |
| 550 | } | 551 | } |
| 551 | out_unlock: | 552 | out_unlock: |
| 552 | spin_unlock_irqrestore(&db->lock, flags); | 553 | raw_spin_unlock_irqrestore(&db->lock, flags); |
| 553 | } | 554 | } |
| 554 | 555 | ||
| 555 | #ifdef CONFIG_DEBUG_OBJECTS_FREE | 556 | #ifdef CONFIG_DEBUG_OBJECTS_FREE |
| @@ -575,7 +576,7 @@ static void __debug_check_no_obj_freed(const void *address, unsigned long size) | |||
| 575 | 576 | ||
| 576 | repeat: | 577 | repeat: |
| 577 | cnt = 0; | 578 | cnt = 0; |
| 578 | spin_lock_irqsave(&db->lock, flags); | 579 | raw_spin_lock_irqsave(&db->lock, flags); |
| 579 | hlist_for_each_entry_safe(obj, node, tmp, &db->list, node) { | 580 | hlist_for_each_entry_safe(obj, node, tmp, &db->list, node) { |
| 580 | cnt++; | 581 | cnt++; |
| 581 | oaddr = (unsigned long) obj->object; | 582 | oaddr = (unsigned long) obj->object; |
| @@ -587,7 +588,7 @@ repeat: | |||
| 587 | debug_print_object(obj, "free"); | 588 | debug_print_object(obj, "free"); |
| 588 | descr = obj->descr; | 589 | descr = obj->descr; |
| 589 | state = obj->state; | 590 | state = obj->state; |
| 590 | spin_unlock_irqrestore(&db->lock, flags); | 591 | raw_spin_unlock_irqrestore(&db->lock, flags); |
| 591 | debug_object_fixup(descr->fixup_free, | 592 | debug_object_fixup(descr->fixup_free, |
| 592 | (void *) oaddr, state); | 593 | (void *) oaddr, state); |
| 593 | goto repeat; | 594 | goto repeat; |
| @@ -597,7 +598,7 @@ repeat: | |||
| 597 | break; | 598 | break; |
| 598 | } | 599 | } |
| 599 | } | 600 | } |
| 600 | spin_unlock_irqrestore(&db->lock, flags); | 601 | raw_spin_unlock_irqrestore(&db->lock, flags); |
| 601 | 602 | ||
| 602 | /* Now free them */ | 603 | /* Now free them */ |
| 603 | hlist_for_each_entry_safe(obj, node, tmp, &freelist, node) { | 604 | hlist_for_each_entry_safe(obj, node, tmp, &freelist, node) { |
| @@ -783,7 +784,7 @@ check_results(void *addr, enum debug_obj_state state, int fixups, int warnings) | |||
| 783 | 784 | ||
| 784 | db = get_bucket((unsigned long) addr); | 785 | db = get_bucket((unsigned long) addr); |
| 785 | 786 | ||
| 786 | spin_lock_irqsave(&db->lock, flags); | 787 | raw_spin_lock_irqsave(&db->lock, flags); |
| 787 | 788 | ||
| 788 | obj = lookup_object(addr, db); | 789 | obj = lookup_object(addr, db); |
| 789 | if (!obj && state != ODEBUG_STATE_NONE) { | 790 | if (!obj && state != ODEBUG_STATE_NONE) { |
| @@ -807,7 +808,7 @@ check_results(void *addr, enum debug_obj_state state, int fixups, int warnings) | |||
| 807 | } | 808 | } |
| 808 | res = 0; | 809 | res = 0; |
| 809 | out: | 810 | out: |
| 810 | spin_unlock_irqrestore(&db->lock, flags); | 811 | raw_spin_unlock_irqrestore(&db->lock, flags); |
| 811 | if (res) | 812 | if (res) |
| 812 | debug_objects_enabled = 0; | 813 | debug_objects_enabled = 0; |
| 813 | return res; | 814 | return res; |
| @@ -907,7 +908,7 @@ void __init debug_objects_early_init(void) | |||
| 907 | int i; | 908 | int i; |
| 908 | 909 | ||
| 909 | for (i = 0; i < ODEBUG_HASH_SIZE; i++) | 910 | for (i = 0; i < ODEBUG_HASH_SIZE; i++) |
| 910 | spin_lock_init(&obj_hash[i].lock); | 911 | raw_spin_lock_init(&obj_hash[i].lock); |
| 911 | 912 | ||
| 912 | for (i = 0; i < ODEBUG_POOL_SIZE; i++) | 913 | for (i = 0; i < ODEBUG_POOL_SIZE; i++) |
| 913 | hlist_add_head(&obj_static_pool[i].node, &obj_pool); | 914 | hlist_add_head(&obj_static_pool[i].node, &obj_pool); |
