Commit | Line | Data |
---|---|---|
64db4cff | 1 | /* |
47dbc906 | 2 | * Read-Copy Update tracing for hierarchical implementation. |
64db4cff PM |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
87de1cfd PM |
15 | * along with this program; if not, you can access it online at |
16 | * http://www.gnu.org/licenses/gpl-2.0.html. | |
64db4cff PM |
17 | * |
18 | * Copyright IBM Corporation, 2008 | |
47dbc906 | 19 | * Author: Paul E. McKenney |
64db4cff PM |
20 | * |
21 | * Papers: http://www.rdrop.com/users/paulmck/RCU | |
22 | * | |
23 | * For detailed explanation of Read-Copy Update mechanism see - | |
a71fca58 | 24 | * Documentation/RCU |
64db4cff PM |
25 | * |
26 | */ | |
27 | #include <linux/types.h> | |
28 | #include <linux/kernel.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/spinlock.h> | |
31 | #include <linux/smp.h> | |
32 | #include <linux/rcupdate.h> | |
33 | #include <linux/interrupt.h> | |
34 | #include <linux/sched.h> | |
60063497 | 35 | #include <linux/atomic.h> |
64db4cff | 36 | #include <linux/bitops.h> |
64db4cff | 37 | #include <linux/completion.h> |
64db4cff PM |
38 | #include <linux/percpu.h> |
39 | #include <linux/notifier.h> | |
40 | #include <linux/cpu.h> | |
41 | #include <linux/mutex.h> | |
42 | #include <linux/debugfs.h> | |
43 | #include <linux/seq_file.h> | |
44 | ||
9f77da9f | 45 | #define RCU_TREE_NONCORE |
4102adab | 46 | #include "tree.h" |
6258c4fb | 47 | |
5cd37193 PM |
48 | DECLARE_PER_CPU_SHARED_ALIGNED(unsigned long, rcu_qs_ctr); |
49 | ||
374b928e MW |
50 | static int r_open(struct inode *inode, struct file *file, |
51 | const struct seq_operations *op) | |
52 | { | |
53 | int ret = seq_open(file, op); | |
54 | if (!ret) { | |
55 | struct seq_file *m = (struct seq_file *)file->private_data; | |
56 | m->private = inode->i_private; | |
57 | } | |
58 | return ret; | |
59 | } | |
60 | ||
61 | static void *r_start(struct seq_file *m, loff_t *pos) | |
62 | { | |
63 | struct rcu_state *rsp = (struct rcu_state *)m->private; | |
64 | *pos = cpumask_next(*pos - 1, cpu_possible_mask); | |
65 | if ((*pos) < nr_cpu_ids) | |
66 | return per_cpu_ptr(rsp->rda, *pos); | |
67 | return NULL; | |
68 | } | |
69 | ||
70 | static void *r_next(struct seq_file *m, void *v, loff_t *pos) | |
71 | { | |
72 | (*pos)++; | |
73 | return r_start(m, pos); | |
74 | } | |
75 | ||
76 | static void r_stop(struct seq_file *m, void *v) | |
77 | { | |
78 | } | |
79 | ||
6ee0886f | 80 | static int show_rcubarrier(struct seq_file *m, void *v) |
c25e557f MW |
81 | { |
82 | struct rcu_state *rsp = (struct rcu_state *)m->private; | |
4f525a52 | 83 | seq_printf(m, "bcc: %d bseq: %lu\n", |
c25e557f | 84 | atomic_read(&rsp->barrier_cpu_count), |
4f525a52 | 85 | rsp->barrier_sequence); |
c25e557f MW |
86 | return 0; |
87 | } | |
88 | ||
6ee0886f | 89 | static int rcubarrier_open(struct inode *inode, struct file *file) |
c25e557f | 90 | { |
6ee0886f | 91 | return single_open(file, show_rcubarrier, inode->i_private); |
c25e557f MW |
92 | } |
93 | ||
6ee0886f | 94 | static const struct file_operations rcubarrier_fops = { |
c25e557f | 95 | .owner = THIS_MODULE, |
6ee0886f | 96 | .open = rcubarrier_open, |
c25e557f MW |
97 | .read = seq_read, |
98 | .llseek = no_llseek, | |
7ee2b9e5 | 99 | .release = single_release, |
c25e557f MW |
100 | }; |
101 | ||
a46e0899 PM |
102 | #ifdef CONFIG_RCU_BOOST |
103 | ||
d71df90e PM |
104 | static char convert_kthread_status(unsigned int kthread_status) |
105 | { | |
106 | if (kthread_status > RCU_KTHREAD_MAX) | |
107 | return '?'; | |
15ba0ba8 | 108 | return "SRWOY"[kthread_status]; |
d71df90e PM |
109 | } |
110 | ||
a46e0899 PM |
111 | #endif /* #ifdef CONFIG_RCU_BOOST */ |
112 | ||
64db4cff PM |
113 | static void print_one_rcu_data(struct seq_file *m, struct rcu_data *rdp) |
114 | { | |
3fbfbf7a PM |
115 | long ql, qll; |
116 | ||
64db4cff PM |
117 | if (!rdp->beenonline) |
118 | return; | |
0d43eb34 | 119 | seq_printf(m, "%3d%cc=%ld g=%ld cnq=%d/%d:%d", |
64db4cff PM |
120 | rdp->cpu, |
121 | cpu_is_offline(rdp->cpu) ? '!' : ' ', | |
42c3533e | 122 | ulong2long(rdp->completed), ulong2long(rdp->gpnum), |
5b74c458 | 123 | rdp->cpu_no_qs.b.norm, |
5cd37193 | 124 | rdp->rcu_qs_ctr_snap == per_cpu(rcu_qs_ctr, rdp->cpu), |
97c668b8 | 125 | rdp->core_needs_qs); |
9b2e4f18 | 126 | seq_printf(m, " dt=%d/%llx/%d df=%lu", |
23b5c8fa | 127 | atomic_read(&rdp->dynticks->dynticks), |
64db4cff | 128 | rdp->dynticks->dynticks_nesting, |
23b5c8fa | 129 | rdp->dynticks->dynticks_nmi_nesting, |
64db4cff | 130 | rdp->dynticks_fqs); |
2036d94a | 131 | seq_printf(m, " of=%lu", rdp->offline_fqs); |
3fbfbf7a PM |
132 | rcu_nocb_q_lengths(rdp, &ql, &qll); |
133 | qll += rdp->qlen_lazy; | |
134 | ql += rdp->qlen; | |
486e2593 | 135 | seq_printf(m, " ql=%ld/%ld qs=%c%c%c%c", |
3fbfbf7a | 136 | qll, ql, |
0ac3d136 PM |
137 | ".N"[rdp->nxttail[RCU_NEXT_READY_TAIL] != |
138 | rdp->nxttail[RCU_NEXT_TAIL]], | |
139 | ".R"[rdp->nxttail[RCU_WAIT_TAIL] != | |
140 | rdp->nxttail[RCU_NEXT_READY_TAIL]], | |
141 | ".W"[rdp->nxttail[RCU_DONE_TAIL] != | |
142 | rdp->nxttail[RCU_WAIT_TAIL]], | |
a46e0899 PM |
143 | ".D"[&rdp->nxtlist != rdp->nxttail[RCU_DONE_TAIL]]); |
144 | #ifdef CONFIG_RCU_BOOST | |
62ab7072 | 145 | seq_printf(m, " kt=%d/%c ktl=%x", |
d71df90e PM |
146 | per_cpu(rcu_cpu_has_work, rdp->cpu), |
147 | convert_kthread_status(per_cpu(rcu_cpu_kthread_status, | |
148 | rdp->cpu)), | |
a46e0899 PM |
149 | per_cpu(rcu_cpu_kthread_loops, rdp->cpu) & 0xffff); |
150 | #endif /* #ifdef CONFIG_RCU_BOOST */ | |
151 | seq_printf(m, " b=%ld", rdp->blimit); | |
c635a4e1 PM |
152 | seq_printf(m, " ci=%lu nci=%lu co=%lu ca=%lu\n", |
153 | rdp->n_cbs_invoked, rdp->n_nocbs_invoked, | |
154 | rdp->n_cbs_orphaned, rdp->n_cbs_adopted); | |
64db4cff PM |
155 | } |
156 | ||
c011c41f | 157 | static int show_rcudata(struct seq_file *m, void *v) |
878eda72 MW |
158 | { |
159 | print_one_rcu_data(m, (struct rcu_data *)v); | |
160 | return 0; | |
161 | } | |
162 | ||
c011c41f | 163 | static const struct seq_operations rcudate_op = { |
878eda72 MW |
164 | .start = r_start, |
165 | .next = r_next, | |
166 | .stop = r_stop, | |
c011c41f | 167 | .show = show_rcudata, |
878eda72 MW |
168 | }; |
169 | ||
c011c41f | 170 | static int rcudata_open(struct inode *inode, struct file *file) |
878eda72 | 171 | { |
c011c41f | 172 | return r_open(inode, file, &rcudate_op); |
878eda72 MW |
173 | } |
174 | ||
c011c41f | 175 | static const struct file_operations rcudata_fops = { |
878eda72 | 176 | .owner = THIS_MODULE, |
c011c41f | 177 | .open = rcudata_open, |
878eda72 MW |
178 | .read = seq_read, |
179 | .llseek = no_llseek, | |
180 | .release = seq_release, | |
181 | }; | |
182 | ||
7bd8f2a7 PM |
183 | static int show_rcuexp(struct seq_file *m, void *v) |
184 | { | |
df5bd514 | 185 | int cpu; |
7bd8f2a7 | 186 | struct rcu_state *rsp = (struct rcu_state *)m->private; |
df5bd514 | 187 | struct rcu_data *rdp; |
e2fd9d35 | 188 | unsigned long s1 = 0, s2 = 0, s3 = 0; |
df5bd514 PM |
189 | |
190 | for_each_possible_cpu(cpu) { | |
191 | rdp = per_cpu_ptr(rsp->rda, cpu); | |
d40a4f09 PM |
192 | s1 += atomic_long_read(&rdp->exp_workdone1); |
193 | s2 += atomic_long_read(&rdp->exp_workdone2); | |
194 | s3 += atomic_long_read(&rdp->exp_workdone3); | |
df5bd514 | 195 | } |
e2fd9d35 PM |
196 | seq_printf(m, "s=%lu wd1=%lu wd2=%lu wd3=%lu n=%lu enq=%d sc=%lu\n", |
197 | rsp->expedited_sequence, s1, s2, s3, | |
7bd8f2a7 | 198 | atomic_long_read(&rsp->expedited_normal), |
3a6d7c64 | 199 | atomic_read(&rsp->expedited_need_qs), |
d6ada2cf | 200 | rsp->expedited_sequence / 2); |
7bd8f2a7 PM |
201 | return 0; |
202 | } | |
203 | ||
204 | static int rcuexp_open(struct inode *inode, struct file *file) | |
205 | { | |
206 | return single_open(file, show_rcuexp, inode->i_private); | |
207 | } | |
208 | ||
209 | static const struct file_operations rcuexp_fops = { | |
210 | .owner = THIS_MODULE, | |
211 | .open = rcuexp_open, | |
212 | .read = seq_read, | |
213 | .llseek = no_llseek, | |
7ee2b9e5 | 214 | .release = single_release, |
7bd8f2a7 PM |
215 | }; |
216 | ||
0ea1f2eb PM |
217 | #ifdef CONFIG_RCU_BOOST |
218 | ||
219 | static void print_one_rcu_node_boost(struct seq_file *m, struct rcu_node *rnp) | |
220 | { | |
5cf05ad7 | 221 | seq_printf(m, "%d:%d tasks=%c%c%c%c kt=%c ntb=%lu neb=%lu nnb=%lu ", |
0ea1f2eb PM |
222 | rnp->grplo, rnp->grphi, |
223 | "T."[list_empty(&rnp->blkd_tasks)], | |
224 | "N."[!rnp->gp_tasks], | |
225 | "E."[!rnp->exp_tasks], | |
226 | "B."[!rnp->boost_tasks], | |
d71df90e | 227 | convert_kthread_status(rnp->boost_kthread_status), |
0ea1f2eb | 228 | rnp->n_tasks_boosted, rnp->n_exp_boosts, |
5cf05ad7 PM |
229 | rnp->n_normal_boosts); |
230 | seq_printf(m, "j=%04x bt=%04x\n", | |
0ea1f2eb PM |
231 | (int)(jiffies & 0xffff), |
232 | (int)(rnp->boost_time & 0xffff)); | |
5cf05ad7 | 233 | seq_printf(m, " balk: nt=%lu egt=%lu bt=%lu nb=%lu ny=%lu nos=%lu\n", |
0ea1f2eb PM |
234 | rnp->n_balk_blkd_tasks, |
235 | rnp->n_balk_exp_gp_tasks, | |
236 | rnp->n_balk_boost_tasks, | |
237 | rnp->n_balk_notblocked, | |
238 | rnp->n_balk_notyet, | |
239 | rnp->n_balk_nos); | |
240 | } | |
241 | ||
242 | static int show_rcu_node_boost(struct seq_file *m, void *unused) | |
243 | { | |
244 | struct rcu_node *rnp; | |
245 | ||
246 | rcu_for_each_leaf_node(&rcu_preempt_state, rnp) | |
247 | print_one_rcu_node_boost(m, rnp); | |
248 | return 0; | |
249 | } | |
250 | ||
251 | static int rcu_node_boost_open(struct inode *inode, struct file *file) | |
252 | { | |
253 | return single_open(file, show_rcu_node_boost, NULL); | |
254 | } | |
255 | ||
256 | static const struct file_operations rcu_node_boost_fops = { | |
257 | .owner = THIS_MODULE, | |
258 | .open = rcu_node_boost_open, | |
259 | .read = seq_read, | |
29c67764 | 260 | .llseek = no_llseek, |
0ea1f2eb PM |
261 | .release = single_release, |
262 | }; | |
263 | ||
6ee0886f | 264 | #endif /* #ifdef CONFIG_RCU_BOOST */ |
0ea1f2eb | 265 | |
64db4cff PM |
266 | static void print_one_rcu_state(struct seq_file *m, struct rcu_state *rsp) |
267 | { | |
20133cfc | 268 | unsigned long gpnum; |
64db4cff PM |
269 | int level = 0; |
270 | struct rcu_node *rnp; | |
271 | ||
3397e040 | 272 | gpnum = rsp->gpnum; |
6ee0886f MW |
273 | seq_printf(m, "c=%ld g=%ld s=%d jfq=%ld j=%x ", |
274 | ulong2long(rsp->completed), ulong2long(gpnum), | |
77f81fe0 | 275 | rsp->gp_state, |
64db4cff | 276 | (long)(rsp->jiffies_force_qs - jiffies), |
5cf05ad7 PM |
277 | (int)(jiffies & 0xffff)); |
278 | seq_printf(m, "nfqs=%lu/nfqsng=%lu(%lu) fqlh=%lu oqlen=%ld/%ld\n", | |
64db4cff PM |
279 | rsp->n_force_qs, rsp->n_force_qs_ngp, |
280 | rsp->n_force_qs - rsp->n_force_qs_ngp, | |
7d0ae808 | 281 | READ_ONCE(rsp->n_force_qs_lh), rsp->qlen_lazy, rsp->qlen); |
f885b7f2 | 282 | for (rnp = &rsp->node[0]; rnp - &rsp->node[0] < rcu_num_nodes; rnp++) { |
64db4cff PM |
283 | if (rnp->level != level) { |
284 | seq_puts(m, "\n"); | |
285 | level = rnp->level; | |
286 | } | |
0aa04b05 PM |
287 | seq_printf(m, "%lx/%lx->%lx %c%c>%c %d:%d ^%d ", |
288 | rnp->qsmask, rnp->qsmaskinit, rnp->qsmaskinitnext, | |
12f5f524 PM |
289 | ".G"[rnp->gp_tasks != NULL], |
290 | ".E"[rnp->exp_tasks != NULL], | |
291 | ".T"[!list_empty(&rnp->blkd_tasks)], | |
64db4cff PM |
292 | rnp->grplo, rnp->grphi, rnp->grpnum); |
293 | } | |
294 | seq_puts(m, "\n"); | |
295 | } | |
296 | ||
6ee0886f | 297 | static int show_rcuhier(struct seq_file *m, void *v) |
64db4cff | 298 | { |
6ee0886f MW |
299 | struct rcu_state *rsp = (struct rcu_state *)m->private; |
300 | print_one_rcu_state(m, rsp); | |
64db4cff PM |
301 | return 0; |
302 | } | |
303 | ||
304 | static int rcuhier_open(struct inode *inode, struct file *file) | |
305 | { | |
6ee0886f | 306 | return single_open(file, show_rcuhier, inode->i_private); |
64db4cff PM |
307 | } |
308 | ||
9b2619af | 309 | static const struct file_operations rcuhier_fops = { |
64db4cff PM |
310 | .owner = THIS_MODULE, |
311 | .open = rcuhier_open, | |
312 | .read = seq_read, | |
a608d84b | 313 | .llseek = no_llseek, |
7ee2b9e5 | 314 | .release = single_release, |
a608d84b MW |
315 | }; |
316 | ||
15ba0ba8 PM |
317 | static void show_one_rcugp(struct seq_file *m, struct rcu_state *rsp) |
318 | { | |
319 | unsigned long flags; | |
320 | unsigned long completed; | |
321 | unsigned long gpnum; | |
322 | unsigned long gpage; | |
323 | unsigned long gpmax; | |
324 | struct rcu_node *rnp = &rsp->node[0]; | |
325 | ||
6cf10081 | 326 | raw_spin_lock_irqsave_rcu_node(rnp, flags); |
7d0ae808 PM |
327 | completed = READ_ONCE(rsp->completed); |
328 | gpnum = READ_ONCE(rsp->gpnum); | |
42c3533e | 329 | if (completed == gpnum) |
15ba0ba8 PM |
330 | gpage = 0; |
331 | else | |
332 | gpage = jiffies - rsp->gp_start; | |
333 | gpmax = rsp->gp_max; | |
334 | raw_spin_unlock_irqrestore(&rnp->lock, flags); | |
6ee0886f MW |
335 | seq_printf(m, "completed=%ld gpnum=%ld age=%ld max=%ld\n", |
336 | ulong2long(completed), ulong2long(gpnum), gpage, gpmax); | |
15ba0ba8 PM |
337 | } |
338 | ||
6ee0886f | 339 | static int show_rcugp(struct seq_file *m, void *v) |
64db4cff | 340 | { |
6ee0886f MW |
341 | struct rcu_state *rsp = (struct rcu_state *)m->private; |
342 | show_one_rcugp(m, rsp); | |
64db4cff PM |
343 | return 0; |
344 | } | |
345 | ||
346 | static int rcugp_open(struct inode *inode, struct file *file) | |
347 | { | |
6ee0886f | 348 | return single_open(file, show_rcugp, inode->i_private); |
64db4cff PM |
349 | } |
350 | ||
9b2619af | 351 | static const struct file_operations rcugp_fops = { |
64db4cff PM |
352 | .owner = THIS_MODULE, |
353 | .open = rcugp_open, | |
354 | .read = seq_read, | |
66b38bc5 | 355 | .llseek = no_llseek, |
7ee2b9e5 | 356 | .release = single_release, |
66b38bc5 MW |
357 | }; |
358 | ||
7ba5c840 PM |
359 | static void print_one_rcu_pending(struct seq_file *m, struct rcu_data *rdp) |
360 | { | |
51d0f16d MW |
361 | if (!rdp->beenonline) |
362 | return; | |
5cf05ad7 | 363 | seq_printf(m, "%3d%cnp=%ld ", |
7ba5c840 PM |
364 | rdp->cpu, |
365 | cpu_is_offline(rdp->cpu) ? '!' : ' ', | |
5cf05ad7 PM |
366 | rdp->n_rcu_pending); |
367 | seq_printf(m, "qsp=%ld rpq=%ld cbr=%ld cng=%ld ", | |
97c668b8 | 368 | rdp->n_rp_core_needs_qs, |
d21670ac | 369 | rdp->n_rp_report_qs, |
7ba5c840 | 370 | rdp->n_rp_cb_ready, |
5cf05ad7 | 371 | rdp->n_rp_cpu_needs_gp); |
96d3fd0d | 372 | seq_printf(m, "gpc=%ld gps=%ld nn=%ld ndw%ld\n", |
7ba5c840 PM |
373 | rdp->n_rp_gp_completed, |
374 | rdp->n_rp_gp_started, | |
96d3fd0d | 375 | rdp->n_rp_nocb_defer_wakeup, |
7ba5c840 PM |
376 | rdp->n_rp_need_nothing); |
377 | } | |
378 | ||
c011c41f | 379 | static int show_rcu_pending(struct seq_file *m, void *v) |
51d0f16d MW |
380 | { |
381 | print_one_rcu_pending(m, (struct rcu_data *)v); | |
382 | return 0; | |
383 | } | |
384 | ||
c011c41f | 385 | static const struct seq_operations rcu_pending_op = { |
51d0f16d MW |
386 | .start = r_start, |
387 | .next = r_next, | |
388 | .stop = r_stop, | |
c011c41f | 389 | .show = show_rcu_pending, |
51d0f16d MW |
390 | }; |
391 | ||
c011c41f | 392 | static int rcu_pending_open(struct inode *inode, struct file *file) |
51d0f16d | 393 | { |
c011c41f | 394 | return r_open(inode, file, &rcu_pending_op); |
51d0f16d MW |
395 | } |
396 | ||
c011c41f | 397 | static const struct file_operations rcu_pending_fops = { |
51d0f16d | 398 | .owner = THIS_MODULE, |
c011c41f | 399 | .open = rcu_pending_open, |
51d0f16d MW |
400 | .read = seq_read, |
401 | .llseek = no_llseek, | |
402 | .release = seq_release, | |
403 | }; | |
404 | ||
4a298656 PM |
405 | static int show_rcutorture(struct seq_file *m, void *unused) |
406 | { | |
407 | seq_printf(m, "rcutorture test sequence: %lu %s\n", | |
408 | rcutorture_testseq >> 1, | |
409 | (rcutorture_testseq & 0x1) ? "(test in progress)" : ""); | |
410 | seq_printf(m, "rcutorture update version number: %lu\n", | |
411 | rcutorture_vernum); | |
412 | return 0; | |
413 | } | |
414 | ||
415 | static int rcutorture_open(struct inode *inode, struct file *file) | |
416 | { | |
417 | return single_open(file, show_rcutorture, NULL); | |
418 | } | |
419 | ||
420 | static const struct file_operations rcutorture_fops = { | |
421 | .owner = THIS_MODULE, | |
422 | .open = rcutorture_open, | |
423 | .read = seq_read, | |
424 | .llseek = seq_lseek, | |
425 | .release = single_release, | |
426 | }; | |
427 | ||
7ba5c840 | 428 | static struct dentry *rcudir; |
7ba5c840 | 429 | |
deb7a418 | 430 | static int __init rcutree_trace_init(void) |
64db4cff | 431 | { |
573bcd40 | 432 | struct rcu_state *rsp; |
22f00b69 | 433 | struct dentry *retval; |
573bcd40 | 434 | struct dentry *rspdir; |
22f00b69 | 435 | |
64db4cff PM |
436 | rcudir = debugfs_create_dir("rcu", NULL); |
437 | if (!rcudir) | |
22f00b69 | 438 | goto free_out; |
64db4cff | 439 | |
573bcd40 MW |
440 | for_each_rcu_flavor(rsp) { |
441 | rspdir = debugfs_create_dir(rsp->name, rcudir); | |
442 | if (!rspdir) | |
443 | goto free_out; | |
878eda72 | 444 | |
6ee0886f MW |
445 | retval = debugfs_create_file("rcudata", 0444, |
446 | rspdir, rsp, &rcudata_fops); | |
447 | if (!retval) | |
448 | goto free_out; | |
51d0f16d | 449 | |
7bd8f2a7 PM |
450 | retval = debugfs_create_file("rcuexp", 0444, |
451 | rspdir, rsp, &rcuexp_fops); | |
452 | if (!retval) | |
453 | goto free_out; | |
454 | ||
6ee0886f MW |
455 | retval = debugfs_create_file("rcu_pending", 0444, |
456 | rspdir, rsp, &rcu_pending_fops); | |
457 | if (!retval) | |
458 | goto free_out; | |
c25e557f | 459 | |
6ee0886f MW |
460 | retval = debugfs_create_file("rcubarrier", 0444, |
461 | rspdir, rsp, &rcubarrier_fops); | |
462 | if (!retval) | |
463 | goto free_out; | |
29c67764 MW |
464 | |
465 | #ifdef CONFIG_RCU_BOOST | |
6ee0886f MW |
466 | if (rsp == &rcu_preempt_state) { |
467 | retval = debugfs_create_file("rcuboost", 0444, | |
468 | rspdir, NULL, &rcu_node_boost_fops); | |
66b38bc5 MW |
469 | if (!retval) |
470 | goto free_out; | |
6ee0886f MW |
471 | } |
472 | #endif | |
66b38bc5 | 473 | |
6ee0886f MW |
474 | retval = debugfs_create_file("rcugp", 0444, |
475 | rspdir, rsp, &rcugp_fops); | |
476 | if (!retval) | |
477 | goto free_out; | |
64db4cff | 478 | |
6ee0886f MW |
479 | retval = debugfs_create_file("rcuhier", 0444, |
480 | rspdir, rsp, &rcuhier_fops); | |
481 | if (!retval) | |
482 | goto free_out; | |
483 | } | |
7ba5c840 | 484 | |
4a298656 PM |
485 | retval = debugfs_create_file("rcutorture", 0444, rcudir, |
486 | NULL, &rcutorture_fops); | |
487 | if (!retval) | |
488 | goto free_out; | |
64db4cff PM |
489 | return 0; |
490 | free_out: | |
22f00b69 | 491 | debugfs_remove_recursive(rcudir); |
64db4cff PM |
492 | return 1; |
493 | } | |
47dbc906 | 494 | device_initcall(rcutree_trace_init); |