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1 | /* |
2 | * This program is free software; you can redistribute it and/or modify |
3 | * it under the terms of the GNU General Public License as published by |
4 | * the Free Software Foundation; either version 2 of the License, or |
5 | * (at your option) any later version. |
6 | * |
7 | * This program is distributed in the hope that it will be useful, |
8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
10 | * GNU General Public License for more details. |
11 | * |
12 | * You should have received a copy of the GNU General Public License |
13 | * along with this program; if not, write to the Free Software |
14 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
15 | * |
16 | * Copyright (C) 2007 Alan Stern |
17 | * Copyright (C) IBM Corporation, 2009 |
18 | * Copyright (C) 2009, Frederic Weisbecker <fweisbec@gmail.com> |
19 | * |
20 | * Thanks to Ingo Molnar for his many suggestions. |
21 | * |
22 | * Authors: Alan Stern <stern@rowland.harvard.edu> |
23 | * K.Prasad <prasad@linux.vnet.ibm.com> |
24 | * Frederic Weisbecker <fweisbec@gmail.com> |
25 | */ |
26 | |
27 | /* |
28 | * HW_breakpoint: a unified kernel/user-space hardware breakpoint facility, |
29 | * using the CPU's debug registers. |
30 | * This file contains the arch-independent routines. |
31 | */ |
32 | |
33 | #include <linux/irqflags.h> |
34 | #include <linux/kallsyms.h> |
35 | #include <linux/notifier.h> |
36 | #include <linux/kprobes.h> |
37 | #include <linux/kdebug.h> |
38 | #include <linux/kernel.h> |
39 | #include <linux/module.h> |
40 | #include <linux/percpu.h> |
41 | #include <linux/sched.h> |
42 | #include <linux/init.h> |
43 | #include <linux/slab.h> |
44 | #include <linux/list.h> |
45 | #include <linux/cpu.h> |
46 | #include <linux/smp.h> |
47 | |
48 | #include <linux/hw_breakpoint.h> |
49 | |
50 | |
51 | /* |
52 | * Constraints data |
53 | */ |
54 | |
55 | /* Number of pinned cpu breakpoints in a cpu */ |
56 | static DEFINE_PER_CPU(unsigned int, nr_cpu_bp_pinned[TYPE_MAX]); |
57 | |
58 | /* Number of pinned task breakpoints in a cpu */ |
59 | static DEFINE_PER_CPU(unsigned int *, nr_task_bp_pinned[TYPE_MAX]); |
60 | |
61 | /* Number of non-pinned cpu/task breakpoints in a cpu */ |
62 | static DEFINE_PER_CPU(unsigned int, nr_bp_flexible[TYPE_MAX]); |
63 | |
64 | static int nr_slots[TYPE_MAX]; |
65 | |
66 | /* Keep track of the breakpoints attached to tasks */ |
67 | static LIST_HEAD(bp_task_head); |
68 | |
69 | static int constraints_initialized; |
70 | |
71 | /* Gather the number of total pinned and un-pinned bp in a cpuset */ |
72 | struct bp_busy_slots { |
73 | unsigned int pinned; |
74 | unsigned int flexible; |
75 | }; |
76 | |
77 | /* Serialize accesses to the above constraints */ |
78 | static DEFINE_MUTEX(nr_bp_mutex); |
79 | |
80 | __weak int hw_breakpoint_weight(struct perf_event *bp) |
81 | { |
82 | return 1; |
83 | } |
84 | |
85 | static inline enum bp_type_idx find_slot_idx(struct perf_event *bp) |
86 | { |
87 | if (bp->attr.bp_type & HW_BREAKPOINT_RW) |
88 | return TYPE_DATA; |
89 | |
90 | return TYPE_INST; |
91 | } |
92 | |
93 | /* |
94 | * Report the maximum number of pinned breakpoints a task |
95 | * have in this cpu |
96 | */ |
97 | static unsigned int max_task_bp_pinned(int cpu, enum bp_type_idx type) |
98 | { |
99 | int i; |
100 | unsigned int *tsk_pinned = per_cpu(nr_task_bp_pinned[type], cpu); |
101 | |
102 | for (i = nr_slots[type] - 1; i >= 0; i--) { |
103 | if (tsk_pinned[i] > 0) |
104 | return i + 1; |
105 | } |
106 | |
107 | return 0; |
108 | } |
109 | |
110 | /* |
111 | * Count the number of breakpoints of the same type and same task. |
112 | * The given event must be not on the list. |
113 | */ |
114 | static int task_bp_pinned(struct perf_event *bp, enum bp_type_idx type) |
115 | { |
116 | struct task_struct *tsk = bp->hw.bp_target; |
117 | struct perf_event *iter; |
118 | int count = 0; |
119 | |
120 | list_for_each_entry(iter, &bp_task_head, hw.bp_list) { |
121 | if (iter->hw.bp_target == tsk && find_slot_idx(iter) == type) |
122 | count += hw_breakpoint_weight(iter); |
123 | } |
124 | |
125 | return count; |
126 | } |
127 | |
128 | /* |
129 | * Report the number of pinned/un-pinned breakpoints we have in |
130 | * a given cpu (cpu > -1) or in all of them (cpu = -1). |
131 | */ |
132 | static void |
133 | fetch_bp_busy_slots(struct bp_busy_slots *slots, struct perf_event *bp, |
134 | enum bp_type_idx type) |
135 | { |
136 | int cpu = bp->cpu; |
137 | struct task_struct *tsk = bp->hw.bp_target; |
138 | |
139 | if (cpu >= 0) { |
140 | slots->pinned = per_cpu(nr_cpu_bp_pinned[type], cpu); |
141 | if (!tsk) |
142 | slots->pinned += max_task_bp_pinned(cpu, type); |
143 | else |
144 | slots->pinned += task_bp_pinned(bp, type); |
145 | slots->flexible = per_cpu(nr_bp_flexible[type], cpu); |
146 | |
147 | return; |
148 | } |
149 | |
150 | for_each_online_cpu(cpu) { |
151 | unsigned int nr; |
152 | |
153 | nr = per_cpu(nr_cpu_bp_pinned[type], cpu); |
154 | if (!tsk) |
155 | nr += max_task_bp_pinned(cpu, type); |
156 | else |
157 | nr += task_bp_pinned(bp, type); |
158 | |
159 | if (nr > slots->pinned) |
160 | slots->pinned = nr; |
161 | |
162 | nr = per_cpu(nr_bp_flexible[type], cpu); |
163 | |
164 | if (nr > slots->flexible) |
165 | slots->flexible = nr; |
166 | } |
167 | } |
168 | |
169 | /* |
170 | * For now, continue to consider flexible as pinned, until we can |
171 | * ensure no flexible event can ever be scheduled before a pinned event |
172 | * in a same cpu. |
173 | */ |
174 | static void |
175 | fetch_this_slot(struct bp_busy_slots *slots, int weight) |
176 | { |
177 | slots->pinned += weight; |
178 | } |
179 | |
180 | /* |
181 | * Add a pinned breakpoint for the given task in our constraint table |
182 | */ |
183 | static void toggle_bp_task_slot(struct perf_event *bp, int cpu, bool enable, |
184 | enum bp_type_idx type, int weight) |
185 | { |
186 | unsigned int *tsk_pinned; |
187 | int old_count = 0; |
188 | int old_idx = 0; |
189 | int idx = 0; |
190 | |
191 | old_count = task_bp_pinned(bp, type); |
192 | old_idx = old_count - 1; |
193 | idx = old_idx + weight; |
194 | |
195 | /* tsk_pinned[n] is the number of tasks having n breakpoints */ |
196 | tsk_pinned = per_cpu(nr_task_bp_pinned[type], cpu); |
197 | if (enable) { |
198 | tsk_pinned[idx]++; |
199 | if (old_count > 0) |
200 | tsk_pinned[old_idx]--; |
201 | } else { |
202 | tsk_pinned[idx]--; |
203 | if (old_count > 0) |
204 | tsk_pinned[old_idx]++; |
205 | } |
206 | } |
207 | |
208 | /* |
209 | * Add/remove the given breakpoint in our constraint table |
210 | */ |
211 | static void |
212 | toggle_bp_slot(struct perf_event *bp, bool enable, enum bp_type_idx type, |
213 | int weight) |
214 | { |
215 | int cpu = bp->cpu; |
216 | struct task_struct *tsk = bp->hw.bp_target; |
217 | |
218 | /* Pinned counter cpu profiling */ |
219 | if (!tsk) { |
220 | |
221 | if (enable) |
222 | per_cpu(nr_cpu_bp_pinned[type], bp->cpu) += weight; |
223 | else |
224 | per_cpu(nr_cpu_bp_pinned[type], bp->cpu) -= weight; |
225 | return; |
226 | } |
227 | |
228 | /* Pinned counter task profiling */ |
229 | |
230 | if (!enable) |
231 | list_del(&bp->hw.bp_list); |
232 | |
233 | if (cpu >= 0) { |
234 | toggle_bp_task_slot(bp, cpu, enable, type, weight); |
235 | } else { |
236 | for_each_online_cpu(cpu) |
237 | toggle_bp_task_slot(bp, cpu, enable, type, weight); |
238 | } |
239 | |
240 | if (enable) |
241 | list_add_tail(&bp->hw.bp_list, &bp_task_head); |
242 | } |
243 | |
244 | /* |
245 | * Function to perform processor-specific cleanup during unregistration |
246 | */ |
247 | __weak void arch_unregister_hw_breakpoint(struct perf_event *bp) |
248 | { |
249 | /* |
250 | * A weak stub function here for those archs that don't define |
251 | * it inside arch/.../kernel/hw_breakpoint.c |
252 | */ |
253 | } |
254 | |
255 | /* |
256 | * Contraints to check before allowing this new breakpoint counter: |
257 | * |
258 | * == Non-pinned counter == (Considered as pinned for now) |
259 | * |
260 | * - If attached to a single cpu, check: |
261 | * |
262 | * (per_cpu(nr_bp_flexible, cpu) || (per_cpu(nr_cpu_bp_pinned, cpu) |
263 | * + max(per_cpu(nr_task_bp_pinned, cpu)))) < HBP_NUM |
264 | * |
265 | * -> If there are already non-pinned counters in this cpu, it means |
266 | * there is already a free slot for them. |
267 | * Otherwise, we check that the maximum number of per task |
268 | * breakpoints (for this cpu) plus the number of per cpu breakpoint |
269 | * (for this cpu) doesn't cover every registers. |
270 | * |
271 | * - If attached to every cpus, check: |
272 | * |
273 | * (per_cpu(nr_bp_flexible, *) || (max(per_cpu(nr_cpu_bp_pinned, *)) |
274 | * + max(per_cpu(nr_task_bp_pinned, *)))) < HBP_NUM |
275 | * |
276 | * -> This is roughly the same, except we check the number of per cpu |
277 | * bp for every cpu and we keep the max one. Same for the per tasks |
278 | * breakpoints. |
279 | * |
280 | * |
281 | * == Pinned counter == |
282 | * |
283 | * - If attached to a single cpu, check: |
284 | * |
285 | * ((per_cpu(nr_bp_flexible, cpu) > 1) + per_cpu(nr_cpu_bp_pinned, cpu) |
286 | * + max(per_cpu(nr_task_bp_pinned, cpu))) < HBP_NUM |
287 | * |
288 | * -> Same checks as before. But now the nr_bp_flexible, if any, must keep |
289 | * one register at least (or they will never be fed). |
290 | * |
291 | * - If attached to every cpus, check: |
292 | * |
293 | * ((per_cpu(nr_bp_flexible, *) > 1) + max(per_cpu(nr_cpu_bp_pinned, *)) |
294 | * + max(per_cpu(nr_task_bp_pinned, *))) < HBP_NUM |
295 | */ |
296 | static int __reserve_bp_slot(struct perf_event *bp) |
297 | { |
298 | struct bp_busy_slots slots = {0}; |
299 | enum bp_type_idx type; |
300 | int weight; |
301 | |
302 | /* We couldn't initialize breakpoint constraints on boot */ |
303 | if (!constraints_initialized) |
304 | return -ENOMEM; |
305 | |
306 | /* Basic checks */ |
307 | if (bp->attr.bp_type == HW_BREAKPOINT_EMPTY || |
308 | bp->attr.bp_type == HW_BREAKPOINT_INVALID) |
309 | return -EINVAL; |
310 | |
311 | type = find_slot_idx(bp); |
312 | weight = hw_breakpoint_weight(bp); |
313 | |
314 | fetch_bp_busy_slots(&slots, bp, type); |
315 | /* |
316 | * Simulate the addition of this breakpoint to the constraints |
317 | * and see the result. |
318 | */ |
319 | fetch_this_slot(&slots, weight); |
320 | |
321 | /* Flexible counters need to keep at least one slot */ |
322 | if (slots.pinned + (!!slots.flexible) > nr_slots[type]) |
323 | return -ENOSPC; |
324 | |
325 | toggle_bp_slot(bp, true, type, weight); |
326 | |
327 | return 0; |
328 | } |
329 | |
330 | int reserve_bp_slot(struct perf_event *bp) |
331 | { |
332 | int ret; |
333 | |
334 | mutex_lock(&nr_bp_mutex); |
335 | |
336 | ret = __reserve_bp_slot(bp); |
337 | |
338 | mutex_unlock(&nr_bp_mutex); |
339 | |
340 | return ret; |
341 | } |
342 | |
343 | static void __release_bp_slot(struct perf_event *bp) |
344 | { |
345 | enum bp_type_idx type; |
346 | int weight; |
347 | |
348 | type = find_slot_idx(bp); |
349 | weight = hw_breakpoint_weight(bp); |
350 | toggle_bp_slot(bp, false, type, weight); |
351 | } |
352 | |
353 | void release_bp_slot(struct perf_event *bp) |
354 | { |
355 | mutex_lock(&nr_bp_mutex); |
356 | |
357 | arch_unregister_hw_breakpoint(bp); |
358 | __release_bp_slot(bp); |
359 | |
360 | mutex_unlock(&nr_bp_mutex); |
361 | } |
362 | |
363 | /* |
364 | * Allow the kernel debugger to reserve breakpoint slots without |
365 | * taking a lock using the dbg_* variant of for the reserve and |
366 | * release breakpoint slots. |
367 | */ |
368 | int dbg_reserve_bp_slot(struct perf_event *bp) |
369 | { |
370 | if (mutex_is_locked(&nr_bp_mutex)) |
371 | return -1; |
372 | |
373 | return __reserve_bp_slot(bp); |
374 | } |
375 | |
376 | int dbg_release_bp_slot(struct perf_event *bp) |
377 | { |
378 | if (mutex_is_locked(&nr_bp_mutex)) |
379 | return -1; |
380 | |
381 | __release_bp_slot(bp); |
382 | |
383 | return 0; |
384 | } |
385 | |
386 | static int validate_hw_breakpoint(struct perf_event *bp) |
387 | { |
388 | int ret; |
389 | |
390 | ret = arch_validate_hwbkpt_settings(bp); |
391 | if (ret) |
392 | return ret; |
393 | |
394 | if (arch_check_bp_in_kernelspace(bp)) { |
395 | if (bp->attr.exclude_kernel) |
396 | return -EINVAL; |
397 | /* |
398 | * Don't let unprivileged users set a breakpoint in the trap |
399 | * path to avoid trap recursion attacks. |
400 | */ |
401 | if (!capable(CAP_SYS_ADMIN)) |
402 | return -EPERM; |
403 | } |
404 | |
405 | return 0; |
406 | } |
407 | |
408 | int register_perf_hw_breakpoint(struct perf_event *bp) |
409 | { |
410 | int ret; |
411 | |
412 | ret = reserve_bp_slot(bp); |
413 | if (ret) |
414 | return ret; |
415 | |
416 | ret = validate_hw_breakpoint(bp); |
417 | |
418 | /* if arch_validate_hwbkpt_settings() fails then release bp slot */ |
419 | if (ret) |
420 | release_bp_slot(bp); |
421 | |
422 | return ret; |
423 | } |
424 | |
425 | /** |
426 | * register_user_hw_breakpoint - register a hardware breakpoint for user space |
427 | * @attr: breakpoint attributes |
428 | * @triggered: callback to trigger when we hit the breakpoint |
429 | * @tsk: pointer to 'task_struct' of the process to which the address belongs |
430 | */ |
431 | struct perf_event * |
432 | register_user_hw_breakpoint(struct perf_event_attr *attr, |
433 | perf_overflow_handler_t triggered, |
434 | struct task_struct *tsk) |
435 | { |
436 | return perf_event_create_kernel_counter(attr, -1, tsk, triggered); |
437 | } |
438 | EXPORT_SYMBOL_GPL(register_user_hw_breakpoint); |
439 | |
440 | /** |
441 | * modify_user_hw_breakpoint - modify a user-space hardware breakpoint |
442 | * @bp: the breakpoint structure to modify |
443 | * @attr: new breakpoint attributes |
444 | * @triggered: callback to trigger when we hit the breakpoint |
445 | * @tsk: pointer to 'task_struct' of the process to which the address belongs |
446 | */ |
447 | int modify_user_hw_breakpoint(struct perf_event *bp, struct perf_event_attr *attr) |
448 | { |
449 | u64 old_addr = bp->attr.bp_addr; |
450 | u64 old_len = bp->attr.bp_len; |
451 | int old_type = bp->attr.bp_type; |
452 | int err = 0; |
453 | |
454 | perf_event_disable(bp); |
455 | |
456 | bp->attr.bp_addr = attr->bp_addr; |
457 | bp->attr.bp_type = attr->bp_type; |
458 | bp->attr.bp_len = attr->bp_len; |
459 | |
460 | if (attr->disabled) |
461 | goto end; |
462 | |
463 | err = validate_hw_breakpoint(bp); |
464 | if (!err) |
465 | perf_event_enable(bp); |
466 | |
467 | if (err) { |
468 | bp->attr.bp_addr = old_addr; |
469 | bp->attr.bp_type = old_type; |
470 | bp->attr.bp_len = old_len; |
471 | if (!bp->attr.disabled) |
472 | perf_event_enable(bp); |
473 | |
474 | return err; |
475 | } |
476 | |
477 | end: |
478 | bp->attr.disabled = attr->disabled; |
479 | |
480 | return 0; |
481 | } |
482 | EXPORT_SYMBOL_GPL(modify_user_hw_breakpoint); |
483 | |
484 | /** |
485 | * unregister_hw_breakpoint - unregister a user-space hardware breakpoint |
486 | * @bp: the breakpoint structure to unregister |
487 | */ |
488 | void unregister_hw_breakpoint(struct perf_event *bp) |
489 | { |
490 | if (!bp) |
491 | return; |
492 | perf_event_release_kernel(bp); |
493 | } |
494 | EXPORT_SYMBOL_GPL(unregister_hw_breakpoint); |
495 | |
496 | /** |
497 | * register_wide_hw_breakpoint - register a wide breakpoint in the kernel |
498 | * @attr: breakpoint attributes |
499 | * @triggered: callback to trigger when we hit the breakpoint |
500 | * |
501 | * @return a set of per_cpu pointers to perf events |
502 | */ |
503 | struct perf_event * __percpu * |
504 | register_wide_hw_breakpoint(struct perf_event_attr *attr, |
505 | perf_overflow_handler_t triggered) |
506 | { |
507 | struct perf_event * __percpu *cpu_events, **pevent, *bp; |
508 | long err; |
509 | int cpu; |
510 | |
511 | cpu_events = alloc_percpu(typeof(*cpu_events)); |
512 | if (!cpu_events) |
513 | return (void __percpu __force *)ERR_PTR(-ENOMEM); |
514 | |
515 | get_online_cpus(); |
516 | for_each_online_cpu(cpu) { |
517 | pevent = per_cpu_ptr(cpu_events, cpu); |
518 | bp = perf_event_create_kernel_counter(attr, cpu, NULL, triggered); |
519 | |
520 | *pevent = bp; |
521 | |
522 | if (IS_ERR(bp)) { |
523 | err = PTR_ERR(bp); |
524 | goto fail; |
525 | } |
526 | } |
527 | put_online_cpus(); |
528 | |
529 | return cpu_events; |
530 | |
531 | fail: |
532 | for_each_online_cpu(cpu) { |
533 | pevent = per_cpu_ptr(cpu_events, cpu); |
534 | if (IS_ERR(*pevent)) |
535 | break; |
536 | unregister_hw_breakpoint(*pevent); |
537 | } |
538 | put_online_cpus(); |
539 | |
540 | free_percpu(cpu_events); |
541 | return (void __percpu __force *)ERR_PTR(err); |
542 | } |
543 | EXPORT_SYMBOL_GPL(register_wide_hw_breakpoint); |
544 | |
545 | /** |
546 | * unregister_wide_hw_breakpoint - unregister a wide breakpoint in the kernel |
547 | * @cpu_events: the per cpu set of events to unregister |
548 | */ |
549 | void unregister_wide_hw_breakpoint(struct perf_event * __percpu *cpu_events) |
550 | { |
551 | int cpu; |
552 | struct perf_event **pevent; |
553 | |
554 | for_each_possible_cpu(cpu) { |
555 | pevent = per_cpu_ptr(cpu_events, cpu); |
556 | unregister_hw_breakpoint(*pevent); |
557 | } |
558 | free_percpu(cpu_events); |
559 | } |
560 | EXPORT_SYMBOL_GPL(unregister_wide_hw_breakpoint); |
561 | |
562 | static struct notifier_block hw_breakpoint_exceptions_nb = { |
563 | .notifier_call = hw_breakpoint_exceptions_notify, |
564 | /* we need to be notified first */ |
565 | .priority = 0x7fffffff |
566 | }; |
567 | |
568 | static void bp_perf_event_destroy(struct perf_event *event) |
569 | { |
570 | release_bp_slot(event); |
571 | } |
572 | |
573 | static int hw_breakpoint_event_init(struct perf_event *bp) |
574 | { |
575 | int err; |
576 | |
577 | if (bp->attr.type != PERF_TYPE_BREAKPOINT) |
578 | return -ENOENT; |
579 | |
580 | err = register_perf_hw_breakpoint(bp); |
581 | if (err) |
582 | return err; |
583 | |
584 | bp->destroy = bp_perf_event_destroy; |
585 | |
586 | return 0; |
587 | } |
588 | |
589 | static int hw_breakpoint_add(struct perf_event *bp, int flags) |
590 | { |
591 | if (!(flags & PERF_EF_START)) |
592 | bp->hw.state = PERF_HES_STOPPED; |
593 | |
594 | return arch_install_hw_breakpoint(bp); |
595 | } |
596 | |
597 | static void hw_breakpoint_del(struct perf_event *bp, int flags) |
598 | { |
599 | arch_uninstall_hw_breakpoint(bp); |
600 | } |
601 | |
602 | static void hw_breakpoint_start(struct perf_event *bp, int flags) |
603 | { |
604 | bp->hw.state = 0; |
605 | } |
606 | |
607 | static void hw_breakpoint_stop(struct perf_event *bp, int flags) |
608 | { |
609 | bp->hw.state = PERF_HES_STOPPED; |
610 | } |
611 | |
612 | static struct pmu perf_breakpoint = { |
613 | .task_ctx_nr = perf_sw_context, /* could eventually get its own */ |
614 | |
615 | .event_init = hw_breakpoint_event_init, |
616 | .add = hw_breakpoint_add, |
617 | .del = hw_breakpoint_del, |
618 | .start = hw_breakpoint_start, |
619 | .stop = hw_breakpoint_stop, |
620 | .read = hw_breakpoint_pmu_read, |
621 | }; |
622 | |
623 | int __init init_hw_breakpoint(void) |
624 | { |
625 | unsigned int **task_bp_pinned; |
626 | int cpu, err_cpu; |
627 | int i; |
628 | |
629 | for (i = 0; i < TYPE_MAX; i++) |
630 | nr_slots[i] = hw_breakpoint_slots(i); |
631 | |
632 | for_each_possible_cpu(cpu) { |
633 | for (i = 0; i < TYPE_MAX; i++) { |
634 | task_bp_pinned = &per_cpu(nr_task_bp_pinned[i], cpu); |
635 | *task_bp_pinned = kzalloc(sizeof(int) * nr_slots[i], |
636 | GFP_KERNEL); |
637 | if (!*task_bp_pinned) |
638 | goto err_alloc; |
639 | } |
640 | } |
641 | |
642 | constraints_initialized = 1; |
643 | |
644 | perf_pmu_register(&perf_breakpoint, "breakpoint", PERF_TYPE_BREAKPOINT); |
645 | |
646 | return register_die_notifier(&hw_breakpoint_exceptions_nb); |
647 | |
648 | err_alloc: |
649 | for_each_possible_cpu(err_cpu) { |
650 | if (err_cpu == cpu) |
651 | break; |
652 | for (i = 0; i < TYPE_MAX; i++) |
653 | kfree(per_cpu(nr_task_bp_pinned[i], cpu)); |
654 | } |
655 | |
656 | return -ENOMEM; |
657 | } |
658 | |
659 | |
660 |
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ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9