]>
Commit | Line | Data |
---|---|---|
0caa8cdf | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * Base infrastructure for Linux-z/VM Monitor Stream, Stage 1. |
4 | * Exports appldata_register_ops() and appldata_unregister_ops() for the | |
5 | * data gathering modules. | |
6 | * | |
524dbcda | 7 | * Copyright IBM Corp. 2003, 2009 |
1da177e4 | 8 | * |
5b5dd21a | 9 | * Author: Gerald Schaefer <gerald.schaefer@de.ibm.com> |
1da177e4 LT |
10 | */ |
11 | ||
e7534b0e GS |
12 | #define KMSG_COMPONENT "appldata" |
13 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
14 | ||
1da177e4 | 15 | #include <linux/module.h> |
3605df49 | 16 | #include <linux/sched/stat.h> |
1da177e4 LT |
17 | #include <linux/init.h> |
18 | #include <linux/slab.h> | |
19 | #include <linux/errno.h> | |
1da177e4 LT |
20 | #include <linux/interrupt.h> |
21 | #include <linux/proc_fs.h> | |
2dcea57a | 22 | #include <linux/mm.h> |
1da177e4 LT |
23 | #include <linux/swap.h> |
24 | #include <linux/pagemap.h> | |
25 | #include <linux/sysctl.h> | |
1da177e4 LT |
26 | #include <linux/notifier.h> |
27 | #include <linux/cpu.h> | |
f26d583e | 28 | #include <linux/workqueue.h> |
524dbcda GS |
29 | #include <linux/suspend.h> |
30 | #include <linux/platform_device.h> | |
1f38d613 | 31 | #include <asm/appldata.h> |
27f6b416 | 32 | #include <asm/vtimer.h> |
7c0f6ba6 | 33 | #include <linux/uaccess.h> |
1f38d613 GS |
34 | #include <asm/io.h> |
35 | #include <asm/smp.h> | |
1da177e4 LT |
36 | |
37 | #include "appldata.h" | |
38 | ||
39 | ||
1da177e4 LT |
40 | #define APPLDATA_CPU_INTERVAL 10000 /* default (CPU) time for |
41 | sampling interval in | |
42 | milliseconds */ | |
43 | ||
44 | #define TOD_MICRO 0x01000 /* nr. of TOD clock units | |
45 | for 1 microsecond */ | |
524dbcda GS |
46 | |
47 | static struct platform_device *appldata_pdev; | |
48 | ||
1da177e4 LT |
49 | /* |
50 | * /proc entries (sysctl) | |
51 | */ | |
52 | static const char appldata_proc_name[APPLDATA_PROC_NAME_LENGTH] = "appldata"; | |
302bfe20 | 53 | static int appldata_timer_handler(struct ctl_table *ctl, int write, |
32927393 | 54 | void *buffer, size_t *lenp, loff_t *ppos); |
302bfe20 | 55 | static int appldata_interval_handler(struct ctl_table *ctl, int write, |
32927393 | 56 | void *buffer, size_t *lenp, loff_t *ppos); |
1da177e4 LT |
57 | |
58 | static struct ctl_table_header *appldata_sysctl_header; | |
59 | static struct ctl_table appldata_table[] = { | |
60 | { | |
1da177e4 LT |
61 | .procname = "timer", |
62 | .mode = S_IRUGO | S_IWUSR, | |
6d456111 | 63 | .proc_handler = appldata_timer_handler, |
1da177e4 LT |
64 | }, |
65 | { | |
1da177e4 LT |
66 | .procname = "interval", |
67 | .mode = S_IRUGO | S_IWUSR, | |
6d456111 | 68 | .proc_handler = appldata_interval_handler, |
1da177e4 | 69 | }, |
37e3a6ac | 70 | { }, |
1da177e4 LT |
71 | }; |
72 | ||
73 | static struct ctl_table appldata_dir_table[] = { | |
74 | { | |
1da177e4 LT |
75 | .procname = appldata_proc_name, |
76 | .maxlen = 0, | |
77 | .mode = S_IRUGO | S_IXUGO, | |
78 | .child = appldata_table, | |
79 | }, | |
37e3a6ac | 80 | { }, |
1da177e4 LT |
81 | }; |
82 | ||
83 | /* | |
84 | * Timer | |
85 | */ | |
27f6b416 | 86 | static struct vtimer_list appldata_timer; |
1da177e4 LT |
87 | |
88 | static DEFINE_SPINLOCK(appldata_timer_lock); | |
89 | static int appldata_interval = APPLDATA_CPU_INTERVAL; | |
90 | static int appldata_timer_active; | |
524dbcda | 91 | static int appldata_timer_suspended = 0; |
1da177e4 LT |
92 | |
93 | /* | |
f26d583e | 94 | * Work queue |
1da177e4 | 95 | */ |
f26d583e | 96 | static struct workqueue_struct *appldata_wq; |
6d5aefb8 DH |
97 | static void appldata_work_fn(struct work_struct *work); |
98 | static DECLARE_WORK(appldata_work, appldata_work_fn); | |
f26d583e | 99 | |
1da177e4 LT |
100 | |
101 | /* | |
102 | * Ops list | |
103 | */ | |
b1ad171e | 104 | static DEFINE_MUTEX(appldata_ops_mutex); |
1da177e4 LT |
105 | static LIST_HEAD(appldata_ops_list); |
106 | ||
107 | ||
f26d583e | 108 | /*************************** timer, work, DIAG *******************************/ |
1da177e4 LT |
109 | /* |
110 | * appldata_timer_function() | |
111 | * | |
f26d583e | 112 | * schedule work and reschedule timer |
1da177e4 | 113 | */ |
9d0a57cb | 114 | static void appldata_timer_function(unsigned long data) |
1da177e4 | 115 | { |
27f6b416 | 116 | queue_work(appldata_wq, (struct work_struct *) data); |
1da177e4 LT |
117 | } |
118 | ||
119 | /* | |
f26d583e | 120 | * appldata_work_fn() |
1da177e4 LT |
121 | * |
122 | * call data gathering function for each (active) module | |
123 | */ | |
6d5aefb8 | 124 | static void appldata_work_fn(struct work_struct *work) |
1da177e4 LT |
125 | { |
126 | struct list_head *lh; | |
127 | struct appldata_ops *ops; | |
1da177e4 | 128 | |
b1ad171e | 129 | mutex_lock(&appldata_ops_mutex); |
1da177e4 LT |
130 | list_for_each(lh, &appldata_ops_list) { |
131 | ops = list_entry(lh, struct appldata_ops, list); | |
1da177e4 LT |
132 | if (ops->active == 1) { |
133 | ops->callback(ops->data); | |
134 | } | |
135 | } | |
b1ad171e | 136 | mutex_unlock(&appldata_ops_mutex); |
1da177e4 LT |
137 | } |
138 | ||
d36a9281 MS |
139 | static struct appldata_product_id appldata_id = { |
140 | .prod_nr = {0xD3, 0xC9, 0xD5, 0xE4, | |
141 | 0xE7, 0xD2, 0xD9}, /* "LINUXKR" */ | |
142 | .prod_fn = 0xD5D3, /* "NL" */ | |
143 | .version_nr = 0xF2F6, /* "26" */ | |
144 | .release_nr = 0xF0F1, /* "01" */ | |
145 | }; | |
146 | ||
1da177e4 LT |
147 | /* |
148 | * appldata_diag() | |
149 | * | |
150 | * prepare parameter list, issue DIAG 0xDC | |
151 | */ | |
5b5dd21a GS |
152 | int appldata_diag(char record_nr, u16 function, unsigned long buffer, |
153 | u16 length, char *mod_lvl) | |
1da177e4 | 154 | { |
d36a9281 MS |
155 | struct appldata_parameter_list *parm_list; |
156 | struct appldata_product_id *id; | |
157 | int rc; | |
158 | ||
159 | parm_list = kmalloc(sizeof(*parm_list), GFP_KERNEL); | |
160 | id = kmemdup(&appldata_id, sizeof(appldata_id), GFP_KERNEL); | |
161 | rc = -ENOMEM; | |
162 | if (parm_list && id) { | |
163 | id->record_nr = record_nr; | |
164 | id->mod_lvl = (mod_lvl[0]) << 8 | mod_lvl[1]; | |
165 | rc = appldata_asm(parm_list, id, function, | |
166 | (void *) buffer, length); | |
167 | } | |
168 | kfree(id); | |
169 | kfree(parm_list); | |
170 | return rc; | |
1da177e4 | 171 | } |
f26d583e | 172 | /************************ timer, work, DIAG <END> ****************************/ |
1da177e4 LT |
173 | |
174 | ||
175 | /****************************** /proc stuff **********************************/ | |
176 | ||
1da177e4 LT |
177 | #define APPLDATA_ADD_TIMER 0 |
178 | #define APPLDATA_DEL_TIMER 1 | |
179 | #define APPLDATA_MOD_TIMER 2 | |
180 | ||
181 | /* | |
182 | * __appldata_vtimer_setup() | |
183 | * | |
184 | * Add, delete or modify virtual timers on all online cpus. | |
185 | * The caller needs to get the appldata_timer_lock spinlock. | |
186 | */ | |
27f6b416 | 187 | static void __appldata_vtimer_setup(int cmd) |
1da177e4 | 188 | { |
27f6b416 | 189 | u64 timer_interval = (u64) appldata_interval * 1000 * TOD_MICRO; |
1da177e4 LT |
190 | |
191 | switch (cmd) { | |
192 | case APPLDATA_ADD_TIMER: | |
193 | if (appldata_timer_active) | |
194 | break; | |
27f6b416 MS |
195 | appldata_timer.expires = timer_interval; |
196 | add_virt_timer_periodic(&appldata_timer); | |
1da177e4 | 197 | appldata_timer_active = 1; |
1da177e4 LT |
198 | break; |
199 | case APPLDATA_DEL_TIMER: | |
27f6b416 | 200 | del_virt_timer(&appldata_timer); |
1da177e4 LT |
201 | if (!appldata_timer_active) |
202 | break; | |
203 | appldata_timer_active = 0; | |
1da177e4 LT |
204 | break; |
205 | case APPLDATA_MOD_TIMER: | |
1da177e4 LT |
206 | if (!appldata_timer_active) |
207 | break; | |
27f6b416 | 208 | mod_virt_timer_periodic(&appldata_timer, timer_interval); |
1da177e4 LT |
209 | } |
210 | } | |
211 | ||
212 | /* | |
213 | * appldata_timer_handler() | |
214 | * | |
215 | * Start/Stop timer, show status of timer (0 = not active, 1 = active) | |
216 | */ | |
217 | static int | |
302bfe20 | 218 | appldata_timer_handler(struct ctl_table *ctl, int write, |
32927393 | 219 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 | 220 | { |
6c802150 | 221 | int timer_active = appldata_timer_active; |
6c802150 VG |
222 | int rc; |
223 | struct ctl_table ctl_entry = { | |
224 | .procname = ctl->procname, | |
225 | .data = &timer_active, | |
226 | .maxlen = sizeof(int), | |
eec4844f MC |
227 | .extra1 = SYSCTL_ZERO, |
228 | .extra2 = SYSCTL_ONE, | |
6c802150 VG |
229 | }; |
230 | ||
231 | rc = proc_douintvec_minmax(&ctl_entry, write, buffer, lenp, ppos); | |
232 | if (rc < 0 || !write) | |
233 | return rc; | |
1da177e4 | 234 | |
1da177e4 | 235 | spin_lock(&appldata_timer_lock); |
6c802150 | 236 | if (timer_active) |
1da177e4 | 237 | __appldata_vtimer_setup(APPLDATA_ADD_TIMER); |
6c802150 | 238 | else |
1da177e4 LT |
239 | __appldata_vtimer_setup(APPLDATA_DEL_TIMER); |
240 | spin_unlock(&appldata_timer_lock); | |
1da177e4 LT |
241 | return 0; |
242 | } | |
243 | ||
244 | /* | |
245 | * appldata_interval_handler() | |
246 | * | |
247 | * Set (CPU) timer interval for collection of data (in milliseconds), show | |
248 | * current timer interval. | |
249 | */ | |
250 | static int | |
302bfe20 | 251 | appldata_interval_handler(struct ctl_table *ctl, int write, |
32927393 | 252 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 | 253 | { |
6c802150 | 254 | int interval = appldata_interval; |
6c802150 VG |
255 | int rc; |
256 | struct ctl_table ctl_entry = { | |
257 | .procname = ctl->procname, | |
258 | .data = &interval, | |
259 | .maxlen = sizeof(int), | |
eec4844f | 260 | .extra1 = SYSCTL_ONE, |
6c802150 | 261 | }; |
1da177e4 | 262 | |
6c802150 VG |
263 | rc = proc_dointvec_minmax(&ctl_entry, write, buffer, lenp, ppos); |
264 | if (rc < 0 || !write) | |
265 | return rc; | |
1da177e4 LT |
266 | |
267 | spin_lock(&appldata_timer_lock); | |
268 | appldata_interval = interval; | |
269 | __appldata_vtimer_setup(APPLDATA_MOD_TIMER); | |
270 | spin_unlock(&appldata_timer_lock); | |
1da177e4 LT |
271 | return 0; |
272 | } | |
273 | ||
274 | /* | |
275 | * appldata_generic_handler() | |
276 | * | |
277 | * Generic start/stop monitoring and DIAG, show status of | |
278 | * monitoring (0 = not in process, 1 = in process) | |
279 | */ | |
280 | static int | |
302bfe20 | 281 | appldata_generic_handler(struct ctl_table *ctl, int write, |
32927393 | 282 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
283 | { |
284 | struct appldata_ops *ops = NULL, *tmp_ops; | |
1da177e4 | 285 | struct list_head *lh; |
6c802150 VG |
286 | int rc, found; |
287 | int active; | |
6c802150 VG |
288 | struct ctl_table ctl_entry = { |
289 | .data = &active, | |
290 | .maxlen = sizeof(int), | |
eec4844f MC |
291 | .extra1 = SYSCTL_ZERO, |
292 | .extra2 = SYSCTL_ONE, | |
6c802150 | 293 | }; |
1da177e4 LT |
294 | |
295 | found = 0; | |
b1ad171e | 296 | mutex_lock(&appldata_ops_mutex); |
1da177e4 LT |
297 | list_for_each(lh, &appldata_ops_list) { |
298 | tmp_ops = list_entry(lh, struct appldata_ops, list); | |
299 | if (&tmp_ops->ctl_table[2] == ctl) { | |
300 | found = 1; | |
301 | } | |
302 | } | |
303 | if (!found) { | |
b1ad171e | 304 | mutex_unlock(&appldata_ops_mutex); |
1da177e4 LT |
305 | return -ENODEV; |
306 | } | |
307 | ops = ctl->data; | |
308 | if (!try_module_get(ops->owner)) { // protect this function | |
b1ad171e | 309 | mutex_unlock(&appldata_ops_mutex); |
1da177e4 LT |
310 | return -ENODEV; |
311 | } | |
b1ad171e | 312 | mutex_unlock(&appldata_ops_mutex); |
1da177e4 | 313 | |
6c802150 VG |
314 | active = ops->active; |
315 | rc = proc_douintvec_minmax(&ctl_entry, write, buffer, lenp, ppos); | |
316 | if (rc < 0 || !write) { | |
1da177e4 | 317 | module_put(ops->owner); |
6c802150 | 318 | return rc; |
1da177e4 LT |
319 | } |
320 | ||
b1ad171e | 321 | mutex_lock(&appldata_ops_mutex); |
6c802150 | 322 | if (active && (ops->active == 0)) { |
f26d583e GS |
323 | // protect work queue callback |
324 | if (!try_module_get(ops->owner)) { | |
b1ad171e | 325 | mutex_unlock(&appldata_ops_mutex); |
1da177e4 LT |
326 | module_put(ops->owner); |
327 | return -ENODEV; | |
328 | } | |
1da177e4 LT |
329 | ops->callback(ops->data); // init record |
330 | rc = appldata_diag(ops->record_nr, | |
331 | APPLDATA_START_INTERVAL_REC, | |
5b5dd21a GS |
332 | (unsigned long) ops->data, ops->size, |
333 | ops->mod_lvl); | |
1da177e4 | 334 | if (rc != 0) { |
e7534b0e GS |
335 | pr_err("Starting the data collection for %s " |
336 | "failed with rc=%d\n", ops->name, rc); | |
1da177e4 | 337 | module_put(ops->owner); |
d3ae942d | 338 | } else |
5b5dd21a | 339 | ops->active = 1; |
6c802150 | 340 | } else if (!active && (ops->active == 1)) { |
1da177e4 LT |
341 | ops->active = 0; |
342 | rc = appldata_diag(ops->record_nr, APPLDATA_STOP_REC, | |
5b5dd21a GS |
343 | (unsigned long) ops->data, ops->size, |
344 | ops->mod_lvl); | |
d3ae942d | 345 | if (rc != 0) |
e7534b0e GS |
346 | pr_err("Stopping the data collection for %s " |
347 | "failed with rc=%d\n", ops->name, rc); | |
1da177e4 LT |
348 | module_put(ops->owner); |
349 | } | |
b1ad171e | 350 | mutex_unlock(&appldata_ops_mutex); |
1da177e4 LT |
351 | module_put(ops->owner); |
352 | return 0; | |
353 | } | |
354 | ||
355 | /*************************** /proc stuff <END> *******************************/ | |
356 | ||
357 | ||
358 | /************************* module-ops management *****************************/ | |
359 | /* | |
360 | * appldata_register_ops() | |
361 | * | |
362 | * update ops list, register /proc/sys entries | |
363 | */ | |
364 | int appldata_register_ops(struct appldata_ops *ops) | |
365 | { | |
13f8b7c5 | 366 | if (ops->size > APPLDATA_MAX_REC_SIZE) |
37e3a6ac | 367 | return -EINVAL; |
1da177e4 | 368 | |
6396bb22 | 369 | ops->ctl_table = kcalloc(4, sizeof(struct ctl_table), GFP_KERNEL); |
37e3a6ac | 370 | if (!ops->ctl_table) |
1da177e4 | 371 | return -ENOMEM; |
1da177e4 | 372 | |
b1ad171e | 373 | mutex_lock(&appldata_ops_mutex); |
1da177e4 | 374 | list_add(&ops->list, &appldata_ops_list); |
b1ad171e | 375 | mutex_unlock(&appldata_ops_mutex); |
1da177e4 | 376 | |
1da177e4 LT |
377 | ops->ctl_table[0].procname = appldata_proc_name; |
378 | ops->ctl_table[0].maxlen = 0; | |
379 | ops->ctl_table[0].mode = S_IRUGO | S_IXUGO; | |
380 | ops->ctl_table[0].child = &ops->ctl_table[2]; | |
381 | ||
1da177e4 LT |
382 | ops->ctl_table[2].procname = ops->name; |
383 | ops->ctl_table[2].mode = S_IRUGO | S_IWUSR; | |
384 | ops->ctl_table[2].proc_handler = appldata_generic_handler; | |
385 | ops->ctl_table[2].data = ops; | |
386 | ||
0b4d4147 | 387 | ops->sysctl_header = register_sysctl_table(ops->ctl_table); |
37e3a6ac HC |
388 | if (!ops->sysctl_header) |
389 | goto out; | |
1da177e4 | 390 | return 0; |
37e3a6ac | 391 | out: |
b1ad171e | 392 | mutex_lock(&appldata_ops_mutex); |
37e3a6ac | 393 | list_del(&ops->list); |
b1ad171e | 394 | mutex_unlock(&appldata_ops_mutex); |
37e3a6ac HC |
395 | kfree(ops->ctl_table); |
396 | return -ENOMEM; | |
1da177e4 LT |
397 | } |
398 | ||
399 | /* | |
400 | * appldata_unregister_ops() | |
401 | * | |
402 | * update ops list, unregister /proc entries, stop DIAG if necessary | |
403 | */ | |
404 | void appldata_unregister_ops(struct appldata_ops *ops) | |
405 | { | |
b1ad171e | 406 | mutex_lock(&appldata_ops_mutex); |
1da177e4 | 407 | list_del(&ops->list); |
b1ad171e | 408 | mutex_unlock(&appldata_ops_mutex); |
330d57fb | 409 | unregister_sysctl_table(ops->sysctl_header); |
37e3a6ac | 410 | kfree(ops->ctl_table); |
1da177e4 LT |
411 | } |
412 | /********************** module-ops management <END> **************************/ | |
413 | ||
414 | ||
524dbcda GS |
415 | /**************************** suspend / resume *******************************/ |
416 | static int appldata_freeze(struct device *dev) | |
417 | { | |
418 | struct appldata_ops *ops; | |
419 | int rc; | |
420 | struct list_head *lh; | |
421 | ||
524dbcda GS |
422 | spin_lock(&appldata_timer_lock); |
423 | if (appldata_timer_active) { | |
424 | __appldata_vtimer_setup(APPLDATA_DEL_TIMER); | |
425 | appldata_timer_suspended = 1; | |
426 | } | |
427 | spin_unlock(&appldata_timer_lock); | |
524dbcda GS |
428 | |
429 | mutex_lock(&appldata_ops_mutex); | |
430 | list_for_each(lh, &appldata_ops_list) { | |
431 | ops = list_entry(lh, struct appldata_ops, list); | |
432 | if (ops->active == 1) { | |
433 | rc = appldata_diag(ops->record_nr, APPLDATA_STOP_REC, | |
434 | (unsigned long) ops->data, ops->size, | |
435 | ops->mod_lvl); | |
436 | if (rc != 0) | |
437 | pr_err("Stopping the data collection for %s " | |
438 | "failed with rc=%d\n", ops->name, rc); | |
439 | } | |
440 | } | |
441 | mutex_unlock(&appldata_ops_mutex); | |
442 | return 0; | |
443 | } | |
444 | ||
445 | static int appldata_restore(struct device *dev) | |
446 | { | |
447 | struct appldata_ops *ops; | |
448 | int rc; | |
449 | struct list_head *lh; | |
450 | ||
524dbcda GS |
451 | spin_lock(&appldata_timer_lock); |
452 | if (appldata_timer_suspended) { | |
453 | __appldata_vtimer_setup(APPLDATA_ADD_TIMER); | |
454 | appldata_timer_suspended = 0; | |
455 | } | |
456 | spin_unlock(&appldata_timer_lock); | |
524dbcda GS |
457 | |
458 | mutex_lock(&appldata_ops_mutex); | |
459 | list_for_each(lh, &appldata_ops_list) { | |
460 | ops = list_entry(lh, struct appldata_ops, list); | |
461 | if (ops->active == 1) { | |
462 | ops->callback(ops->data); // init record | |
463 | rc = appldata_diag(ops->record_nr, | |
464 | APPLDATA_START_INTERVAL_REC, | |
465 | (unsigned long) ops->data, ops->size, | |
466 | ops->mod_lvl); | |
467 | if (rc != 0) { | |
468 | pr_err("Starting the data collection for %s " | |
469 | "failed with rc=%d\n", ops->name, rc); | |
470 | } | |
471 | } | |
472 | } | |
473 | mutex_unlock(&appldata_ops_mutex); | |
474 | return 0; | |
475 | } | |
476 | ||
477 | static int appldata_thaw(struct device *dev) | |
478 | { | |
479 | return appldata_restore(dev); | |
480 | } | |
481 | ||
47145210 | 482 | static const struct dev_pm_ops appldata_pm_ops = { |
524dbcda GS |
483 | .freeze = appldata_freeze, |
484 | .thaw = appldata_thaw, | |
485 | .restore = appldata_restore, | |
486 | }; | |
487 | ||
488 | static struct platform_driver appldata_pdrv = { | |
489 | .driver = { | |
490 | .name = "appldata", | |
524dbcda GS |
491 | .pm = &appldata_pm_ops, |
492 | }, | |
493 | }; | |
494 | /************************* suspend / resume <END> ****************************/ | |
495 | ||
496 | ||
1da177e4 LT |
497 | /******************************* init / exit *********************************/ |
498 | ||
1da177e4 LT |
499 | /* |
500 | * appldata_init() | |
501 | * | |
f26d583e | 502 | * init timer, register /proc entries |
1da177e4 LT |
503 | */ |
504 | static int __init appldata_init(void) | |
505 | { | |
27f6b416 MS |
506 | int rc; |
507 | ||
b7c5b1aa | 508 | init_virt_timer(&appldata_timer); |
27f6b416 MS |
509 | appldata_timer.function = appldata_timer_function; |
510 | appldata_timer.data = (unsigned long) &appldata_work; | |
524dbcda GS |
511 | |
512 | rc = platform_driver_register(&appldata_pdrv); | |
513 | if (rc) | |
514 | return rc; | |
1da177e4 | 515 | |
524dbcda GS |
516 | appldata_pdev = platform_device_register_simple("appldata", -1, NULL, |
517 | 0); | |
518 | if (IS_ERR(appldata_pdev)) { | |
519 | rc = PTR_ERR(appldata_pdev); | |
520 | goto out_driver; | |
521 | } | |
e68f1d4c | 522 | appldata_wq = alloc_ordered_workqueue("appldata", 0); |
524dbcda GS |
523 | if (!appldata_wq) { |
524 | rc = -ENOMEM; | |
525 | goto out_device; | |
526 | } | |
f26d583e | 527 | |
0b4d4147 | 528 | appldata_sysctl_header = register_sysctl_table(appldata_dir_table); |
1da177e4 | 529 | return 0; |
524dbcda GS |
530 | |
531 | out_device: | |
532 | platform_device_unregister(appldata_pdev); | |
533 | out_driver: | |
534 | platform_driver_unregister(&appldata_pdrv); | |
535 | return rc; | |
1da177e4 LT |
536 | } |
537 | ||
076fc808 | 538 | __initcall(appldata_init); |
1da177e4 | 539 | |
1da177e4 LT |
540 | /**************************** init / exit <END> ******************************/ |
541 | ||
1da177e4 LT |
542 | EXPORT_SYMBOL_GPL(appldata_register_ops); |
543 | EXPORT_SYMBOL_GPL(appldata_unregister_ops); | |
5b5dd21a | 544 | EXPORT_SYMBOL_GPL(appldata_diag); |
1da177e4 | 545 | |
0c3252d5 | 546 | #ifdef CONFIG_SWAP |
1da177e4 | 547 | EXPORT_SYMBOL_GPL(si_swapinfo); |
0c3252d5 | 548 | #endif |
1da177e4 | 549 | EXPORT_SYMBOL_GPL(nr_threads); |
1da177e4 LT |
550 | EXPORT_SYMBOL_GPL(nr_running); |
551 | EXPORT_SYMBOL_GPL(nr_iowait); |