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Commit | Line | Data |
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16444a8a ACM |
1 | #ifndef _LINUX_FTRACE_H |
2 | #define _LINUX_FTRACE_H | |
3 | ||
16444a8a | 4 | #include <linux/linkage.h> |
d49dbf33 | 5 | #include <linux/fs.h> |
eb7fa935 | 6 | #include <linux/ktime.h> |
d13744cd FW |
7 | #include <linux/init.h> |
8 | #include <linux/types.h> | |
9c246247 | 9 | #include <linux/module.h> |
5601020f | 10 | #include <linux/kallsyms.h> |
ea4e2bc4 | 11 | #include <linux/bitops.h> |
21a8c466 | 12 | #include <linux/sched.h> |
16444a8a | 13 | |
606576ce | 14 | #ifdef CONFIG_FUNCTION_TRACER |
3e1932ad | 15 | |
b0fc494f SR |
16 | extern int ftrace_enabled; |
17 | extern int | |
18 | ftrace_enable_sysctl(struct ctl_table *table, int write, | |
19 | struct file *filp, void __user *buffer, size_t *lenp, | |
20 | loff_t *ppos); | |
21 | ||
16444a8a ACM |
22 | typedef void (*ftrace_func_t)(unsigned long ip, unsigned long parent_ip); |
23 | ||
24 | struct ftrace_ops { | |
25 | ftrace_func_t func; | |
26 | struct ftrace_ops *next; | |
27 | }; | |
28 | ||
60a7ecf4 SR |
29 | extern int function_trace_stop; |
30 | ||
e7d3737e FW |
31 | /* |
32 | * Type of the current tracing. | |
33 | */ | |
34 | enum ftrace_tracing_type_t { | |
35 | FTRACE_TYPE_ENTER = 0, /* Hook the call of the function */ | |
36 | FTRACE_TYPE_RETURN, /* Hook the return of the function */ | |
37 | }; | |
38 | ||
39 | /* Current tracing type, default is FTRACE_TYPE_ENTER */ | |
40 | extern enum ftrace_tracing_type_t ftrace_tracing_type; | |
41 | ||
60a7ecf4 SR |
42 | /** |
43 | * ftrace_stop - stop function tracer. | |
44 | * | |
45 | * A quick way to stop the function tracer. Note this an on off switch, | |
46 | * it is not something that is recursive like preempt_disable. | |
47 | * This does not disable the calling of mcount, it only stops the | |
48 | * calling of functions from mcount. | |
49 | */ | |
50 | static inline void ftrace_stop(void) | |
51 | { | |
52 | function_trace_stop = 1; | |
53 | } | |
54 | ||
55 | /** | |
56 | * ftrace_start - start the function tracer. | |
57 | * | |
58 | * This function is the inverse of ftrace_stop. This does not enable | |
59 | * the function tracing if the function tracer is disabled. This only | |
60 | * sets the function tracer flag to continue calling the functions | |
61 | * from mcount. | |
62 | */ | |
63 | static inline void ftrace_start(void) | |
64 | { | |
65 | function_trace_stop = 0; | |
66 | } | |
67 | ||
16444a8a ACM |
68 | /* |
69 | * The ftrace_ops must be a static and should also | |
70 | * be read_mostly. These functions do modify read_mostly variables | |
71 | * so use them sparely. Never free an ftrace_op or modify the | |
72 | * next pointer after it has been registered. Even after unregistering | |
73 | * it, the next pointer may still be used internally. | |
74 | */ | |
75 | int register_ftrace_function(struct ftrace_ops *ops); | |
76 | int unregister_ftrace_function(struct ftrace_ops *ops); | |
77 | void clear_ftrace_function(void); | |
78 | ||
79 | extern void ftrace_stub(unsigned long a0, unsigned long a1); | |
16444a8a | 80 | |
606576ce | 81 | #else /* !CONFIG_FUNCTION_TRACER */ |
16444a8a ACM |
82 | # define register_ftrace_function(ops) do { } while (0) |
83 | # define unregister_ftrace_function(ops) do { } while (0) | |
84 | # define clear_ftrace_function(ops) do { } while (0) | |
81adbdc0 | 85 | static inline void ftrace_kill(void) { } |
60a7ecf4 SR |
86 | static inline void ftrace_stop(void) { } |
87 | static inline void ftrace_start(void) { } | |
606576ce | 88 | #endif /* CONFIG_FUNCTION_TRACER */ |
352ad25a | 89 | |
f38f1d2a SR |
90 | #ifdef CONFIG_STACK_TRACER |
91 | extern int stack_tracer_enabled; | |
92 | int | |
93 | stack_trace_sysctl(struct ctl_table *table, int write, | |
94 | struct file *file, void __user *buffer, size_t *lenp, | |
95 | loff_t *ppos); | |
96 | #endif | |
97 | ||
3d083395 | 98 | #ifdef CONFIG_DYNAMIC_FTRACE |
31e88909 SR |
99 | /* asm/ftrace.h must be defined for archs supporting dynamic ftrace */ |
100 | #include <asm/ftrace.h> | |
101 | ||
3c1720f0 | 102 | enum { |
37ad5084 SR |
103 | FTRACE_FL_FREE = (1 << 0), |
104 | FTRACE_FL_FAILED = (1 << 1), | |
105 | FTRACE_FL_FILTER = (1 << 2), | |
106 | FTRACE_FL_ENABLED = (1 << 3), | |
41c52c0d | 107 | FTRACE_FL_NOTRACE = (1 << 4), |
0eb96701 | 108 | FTRACE_FL_CONVERTED = (1 << 5), |
ecea656d | 109 | FTRACE_FL_FROZEN = (1 << 6), |
3c1720f0 SR |
110 | }; |
111 | ||
3d083395 | 112 | struct dyn_ftrace { |
08f5ac90 SR |
113 | struct list_head list; |
114 | unsigned long ip; /* address of mcount call-site */ | |
115 | unsigned long flags; | |
31e88909 | 116 | struct dyn_arch_ftrace arch; |
3d083395 SR |
117 | }; |
118 | ||
e1c08bdd | 119 | int ftrace_force_update(void); |
77a2b37d | 120 | void ftrace_set_filter(unsigned char *buf, int len, int reset); |
e1c08bdd | 121 | |
3d083395 | 122 | /* defined in arch */ |
3c1720f0 | 123 | extern int ftrace_ip_converted(unsigned long ip); |
d61f82d0 | 124 | extern int ftrace_dyn_arch_init(void *data); |
d61f82d0 SR |
125 | extern int ftrace_update_ftrace_func(ftrace_func_t func); |
126 | extern void ftrace_caller(void); | |
127 | extern void ftrace_call(void); | |
128 | extern void mcount_call(void); | |
fb52607a FW |
129 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
130 | extern void ftrace_graph_caller(void); | |
5a45cfe1 SR |
131 | extern int ftrace_enable_ftrace_graph_caller(void); |
132 | extern int ftrace_disable_ftrace_graph_caller(void); | |
133 | #else | |
134 | static inline int ftrace_enable_ftrace_graph_caller(void) { return 0; } | |
135 | static inline int ftrace_disable_ftrace_graph_caller(void) { return 0; } | |
e7d3737e | 136 | #endif |
ad90c0e3 | 137 | |
31e88909 SR |
138 | /** |
139 | * ftrace_make_nop - convert code into top | |
140 | * @mod: module structure if called by module load initialization | |
141 | * @rec: the mcount call site record | |
142 | * @addr: the address that the call site should be calling | |
143 | * | |
144 | * This is a very sensitive operation and great care needs | |
145 | * to be taken by the arch. The operation should carefully | |
146 | * read the location, check to see if what is read is indeed | |
147 | * what we expect it to be, and then on success of the compare, | |
148 | * it should write to the location. | |
149 | * | |
150 | * The code segment at @rec->ip should be a caller to @addr | |
151 | * | |
152 | * Return must be: | |
153 | * 0 on success | |
154 | * -EFAULT on error reading the location | |
155 | * -EINVAL on a failed compare of the contents | |
156 | * -EPERM on error writing to the location | |
157 | * Any other value will be considered a failure. | |
158 | */ | |
159 | extern int ftrace_make_nop(struct module *mod, | |
160 | struct dyn_ftrace *rec, unsigned long addr); | |
a26a2a27 | 161 | |
593eb8a2 | 162 | /** |
31e88909 SR |
163 | * ftrace_make_call - convert a nop call site into a call to addr |
164 | * @rec: the mcount call site record | |
165 | * @addr: the address that the call site should call | |
593eb8a2 SR |
166 | * |
167 | * This is a very sensitive operation and great care needs | |
168 | * to be taken by the arch. The operation should carefully | |
169 | * read the location, check to see if what is read is indeed | |
170 | * what we expect it to be, and then on success of the compare, | |
171 | * it should write to the location. | |
172 | * | |
31e88909 SR |
173 | * The code segment at @rec->ip should be a nop |
174 | * | |
593eb8a2 SR |
175 | * Return must be: |
176 | * 0 on success | |
177 | * -EFAULT on error reading the location | |
178 | * -EINVAL on a failed compare of the contents | |
179 | * -EPERM on error writing to the location | |
180 | * Any other value will be considered a failure. | |
181 | */ | |
31e88909 SR |
182 | extern int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr); |
183 | ||
184 | ||
185 | /* May be defined in arch */ | |
186 | extern int ftrace_arch_read_dyn_info(char *buf, int size); | |
593eb8a2 | 187 | |
ecea656d AS |
188 | extern int skip_trace(unsigned long ip); |
189 | ||
c0719e5a SR |
190 | extern void ftrace_release(void *start, unsigned long size); |
191 | ||
192 | extern void ftrace_disable_daemon(void); | |
193 | extern void ftrace_enable_daemon(void); | |
e1c08bdd | 194 | #else |
ecea656d | 195 | # define skip_trace(ip) ({ 0; }) |
aeaee8a2 IM |
196 | # define ftrace_force_update() ({ 0; }) |
197 | # define ftrace_set_filter(buf, len, reset) do { } while (0) | |
ad90c0e3 SR |
198 | # define ftrace_disable_daemon() do { } while (0) |
199 | # define ftrace_enable_daemon() do { } while (0) | |
c0719e5a | 200 | static inline void ftrace_release(void *start, unsigned long size) { } |
ecea656d | 201 | #endif /* CONFIG_DYNAMIC_FTRACE */ |
352ad25a | 202 | |
aeaee8a2 IM |
203 | /* totally disable ftrace - can not re-enable after this */ |
204 | void ftrace_kill(void); | |
205 | ||
f43fdad8 IM |
206 | static inline void tracer_disable(void) |
207 | { | |
606576ce | 208 | #ifdef CONFIG_FUNCTION_TRACER |
f43fdad8 IM |
209 | ftrace_enabled = 0; |
210 | #endif | |
211 | } | |
212 | ||
37002735 HY |
213 | /* |
214 | * Ftrace disable/restore without lock. Some synchronization mechanism | |
9bdeb7b5 | 215 | * must be used to prevent ftrace_enabled to be changed between |
37002735 HY |
216 | * disable/restore. |
217 | */ | |
9bdeb7b5 HY |
218 | static inline int __ftrace_enabled_save(void) |
219 | { | |
606576ce | 220 | #ifdef CONFIG_FUNCTION_TRACER |
9bdeb7b5 HY |
221 | int saved_ftrace_enabled = ftrace_enabled; |
222 | ftrace_enabled = 0; | |
223 | return saved_ftrace_enabled; | |
224 | #else | |
225 | return 0; | |
226 | #endif | |
227 | } | |
228 | ||
229 | static inline void __ftrace_enabled_restore(int enabled) | |
230 | { | |
606576ce | 231 | #ifdef CONFIG_FUNCTION_TRACER |
9bdeb7b5 HY |
232 | ftrace_enabled = enabled; |
233 | #endif | |
234 | } | |
235 | ||
352ad25a SR |
236 | #ifdef CONFIG_FRAME_POINTER |
237 | /* TODO: need to fix this for ARM */ | |
238 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) | |
239 | # define CALLER_ADDR1 ((unsigned long)__builtin_return_address(1)) | |
240 | # define CALLER_ADDR2 ((unsigned long)__builtin_return_address(2)) | |
241 | # define CALLER_ADDR3 ((unsigned long)__builtin_return_address(3)) | |
242 | # define CALLER_ADDR4 ((unsigned long)__builtin_return_address(4)) | |
243 | # define CALLER_ADDR5 ((unsigned long)__builtin_return_address(5)) | |
86387f7e | 244 | # define CALLER_ADDR6 ((unsigned long)__builtin_return_address(6)) |
352ad25a SR |
245 | #else |
246 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) | |
247 | # define CALLER_ADDR1 0UL | |
248 | # define CALLER_ADDR2 0UL | |
249 | # define CALLER_ADDR3 0UL | |
250 | # define CALLER_ADDR4 0UL | |
251 | # define CALLER_ADDR5 0UL | |
86387f7e | 252 | # define CALLER_ADDR6 0UL |
352ad25a SR |
253 | #endif |
254 | ||
81d68a96 | 255 | #ifdef CONFIG_IRQSOFF_TRACER |
489f1396 IM |
256 | extern void time_hardirqs_on(unsigned long a0, unsigned long a1); |
257 | extern void time_hardirqs_off(unsigned long a0, unsigned long a1); | |
81d68a96 SR |
258 | #else |
259 | # define time_hardirqs_on(a0, a1) do { } while (0) | |
260 | # define time_hardirqs_off(a0, a1) do { } while (0) | |
261 | #endif | |
262 | ||
6cd8a4bb | 263 | #ifdef CONFIG_PREEMPT_TRACER |
489f1396 IM |
264 | extern void trace_preempt_on(unsigned long a0, unsigned long a1); |
265 | extern void trace_preempt_off(unsigned long a0, unsigned long a1); | |
6cd8a4bb SR |
266 | #else |
267 | # define trace_preempt_on(a0, a1) do { } while (0) | |
268 | # define trace_preempt_off(a0, a1) do { } while (0) | |
269 | #endif | |
270 | ||
b1829d27 | 271 | #ifdef CONFIG_TRACING |
944ac425 SR |
272 | extern int ftrace_dump_on_oops; |
273 | ||
0f048701 SR |
274 | extern void tracing_start(void); |
275 | extern void tracing_stop(void); | |
69bb54ec | 276 | extern void ftrace_off_permanent(void); |
0f048701 | 277 | |
74f4e369 IM |
278 | extern void |
279 | ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3); | |
2f2c99db SR |
280 | |
281 | /** | |
282 | * ftrace_printk - printf formatting in the ftrace buffer | |
283 | * @fmt: the printf format for printing | |
284 | * | |
285 | * Note: __ftrace_printk is an internal function for ftrace_printk and | |
286 | * the @ip is passed in via the ftrace_printk macro. | |
287 | * | |
288 | * This function allows a kernel developer to debug fast path sections | |
289 | * that printk is not appropriate for. By scattering in various | |
290 | * printk like tracing in the code, a developer can quickly see | |
291 | * where problems are occurring. | |
292 | * | |
293 | * This is intended as a debugging tool for the developer only. | |
294 | * Please refrain from leaving ftrace_printks scattered around in | |
295 | * your code. | |
296 | */ | |
297 | # define ftrace_printk(fmt...) __ftrace_printk(_THIS_IP_, fmt) | |
dd0e545f SR |
298 | extern int |
299 | __ftrace_printk(unsigned long ip, const char *fmt, ...) | |
300 | __attribute__ ((format (printf, 2, 3))); | |
3f5a54e3 | 301 | extern void ftrace_dump(void); |
74f4e369 IM |
302 | #else |
303 | static inline void | |
304 | ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3) { } | |
dd0e545f | 305 | static inline int |
3ddeb912 | 306 | ftrace_printk(const char *fmt, ...) __attribute__ ((format (printf, 1, 2))); |
7b928c23 | 307 | |
0f048701 SR |
308 | static inline void tracing_start(void) { } |
309 | static inline void tracing_stop(void) { } | |
69bb54ec | 310 | static inline void ftrace_off_permanent(void) { } |
7b928c23 IM |
311 | static inline int |
312 | ftrace_printk(const char *fmt, ...) | |
dd0e545f SR |
313 | { |
314 | return 0; | |
315 | } | |
3f5a54e3 | 316 | static inline void ftrace_dump(void) { } |
74f4e369 IM |
317 | #endif |
318 | ||
68bf21aa SR |
319 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
320 | extern void ftrace_init(void); | |
31e88909 SR |
321 | extern void ftrace_init_module(struct module *mod, |
322 | unsigned long *start, unsigned long *end); | |
68bf21aa SR |
323 | #else |
324 | static inline void ftrace_init(void) { } | |
90d595fe | 325 | static inline void |
31e88909 SR |
326 | ftrace_init_module(struct module *mod, |
327 | unsigned long *start, unsigned long *end) { } | |
68bf21aa SR |
328 | #endif |
329 | ||
f3f47a67 AV |
330 | enum { |
331 | POWER_NONE = 0, | |
332 | POWER_CSTATE = 1, | |
333 | POWER_PSTATE = 2, | |
334 | }; | |
335 | ||
336 | struct power_trace { | |
337 | #ifdef CONFIG_POWER_TRACER | |
338 | ktime_t stamp; | |
339 | ktime_t end; | |
340 | int type; | |
341 | int state; | |
342 | #endif | |
343 | }; | |
344 | ||
345 | #ifdef CONFIG_POWER_TRACER | |
346 | extern void trace_power_start(struct power_trace *it, unsigned int type, | |
347 | unsigned int state); | |
348 | extern void trace_power_mark(struct power_trace *it, unsigned int type, | |
349 | unsigned int state); | |
350 | extern void trace_power_end(struct power_trace *it); | |
351 | #else | |
352 | static inline void trace_power_start(struct power_trace *it, unsigned int type, | |
353 | unsigned int state) { } | |
354 | static inline void trace_power_mark(struct power_trace *it, unsigned int type, | |
355 | unsigned int state) { } | |
356 | static inline void trace_power_end(struct power_trace *it) { } | |
357 | #endif | |
358 | ||
dd0e545f | 359 | |
287b6e68 FW |
360 | /* |
361 | * Structure that defines an entry function trace. | |
362 | */ | |
363 | struct ftrace_graph_ent { | |
364 | unsigned long func; /* Current function */ | |
365 | int depth; | |
366 | }; | |
dd0e545f | 367 | |
caf4b323 FW |
368 | /* |
369 | * Structure that defines a return function trace. | |
370 | */ | |
fb52607a | 371 | struct ftrace_graph_ret { |
caf4b323 FW |
372 | unsigned long func; /* Current function */ |
373 | unsigned long long calltime; | |
374 | unsigned long long rettime; | |
0231022c FW |
375 | /* Number of functions that overran the depth limit for current task */ |
376 | unsigned long overrun; | |
287b6e68 | 377 | int depth; |
caf4b323 FW |
378 | }; |
379 | ||
fb52607a | 380 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
8b96f011 FW |
381 | |
382 | /* | |
383 | * Sometimes we don't want to trace a function with the function | |
384 | * graph tracer but we want them to keep traced by the usual function | |
385 | * tracer if the function graph tracer is not configured. | |
386 | */ | |
387 | #define __notrace_funcgraph notrace | |
388 | ||
bcbc4f20 FW |
389 | /* |
390 | * We want to which function is an entrypoint of a hardirq. | |
391 | * That will help us to put a signal on output. | |
392 | */ | |
393 | #define __irq_entry __attribute__((__section__(".irqentry.text"))) | |
394 | ||
395 | /* Limits of hardirq entrypoints */ | |
396 | extern char __irqentry_text_start[]; | |
397 | extern char __irqentry_text_end[]; | |
398 | ||
f201ae23 FW |
399 | #define FTRACE_RETFUNC_DEPTH 50 |
400 | #define FTRACE_RETSTACK_ALLOC_SIZE 32 | |
287b6e68 FW |
401 | /* Type of the callback handlers for tracing function graph*/ |
402 | typedef void (*trace_func_graph_ret_t)(struct ftrace_graph_ret *); /* return */ | |
e49dc19c | 403 | typedef int (*trace_func_graph_ent_t)(struct ftrace_graph_ent *); /* entry */ |
287b6e68 FW |
404 | |
405 | extern int register_ftrace_graph(trace_func_graph_ret_t retfunc, | |
406 | trace_func_graph_ent_t entryfunc); | |
407 | ||
14a866c5 SR |
408 | extern void ftrace_graph_stop(void); |
409 | ||
287b6e68 FW |
410 | /* The current handlers in use */ |
411 | extern trace_func_graph_ret_t ftrace_graph_return; | |
412 | extern trace_func_graph_ent_t ftrace_graph_entry; | |
caf4b323 | 413 | |
fb52607a | 414 | extern void unregister_ftrace_graph(void); |
f201ae23 | 415 | |
fb52607a FW |
416 | extern void ftrace_graph_init_task(struct task_struct *t); |
417 | extern void ftrace_graph_exit_task(struct task_struct *t); | |
21a8c466 FW |
418 | |
419 | static inline int task_curr_ret_stack(struct task_struct *t) | |
420 | { | |
421 | return t->curr_ret_stack; | |
422 | } | |
380c4b14 FW |
423 | |
424 | static inline void pause_graph_tracing(void) | |
425 | { | |
426 | atomic_inc(¤t->tracing_graph_pause); | |
427 | } | |
428 | ||
429 | static inline void unpause_graph_tracing(void) | |
430 | { | |
431 | atomic_dec(¤t->tracing_graph_pause); | |
432 | } | |
82f60f0b | 433 | #else |
8b96f011 FW |
434 | |
435 | #define __notrace_funcgraph | |
bcbc4f20 | 436 | #define __irq_entry |
8b96f011 | 437 | |
fb52607a FW |
438 | static inline void ftrace_graph_init_task(struct task_struct *t) { } |
439 | static inline void ftrace_graph_exit_task(struct task_struct *t) { } | |
21a8c466 FW |
440 | |
441 | static inline int task_curr_ret_stack(struct task_struct *tsk) | |
442 | { | |
443 | return -1; | |
444 | } | |
380c4b14 FW |
445 | |
446 | static inline void pause_graph_tracing(void) { } | |
447 | static inline void unpause_graph_tracing(void) { } | |
caf4b323 FW |
448 | #endif |
449 | ||
ea4e2bc4 SR |
450 | #ifdef CONFIG_TRACING |
451 | #include <linux/sched.h> | |
452 | ||
453 | /* flags for current->trace */ | |
454 | enum { | |
455 | TSK_TRACE_FL_TRACE_BIT = 0, | |
456 | TSK_TRACE_FL_GRAPH_BIT = 1, | |
457 | }; | |
458 | enum { | |
459 | TSK_TRACE_FL_TRACE = 1 << TSK_TRACE_FL_TRACE_BIT, | |
460 | TSK_TRACE_FL_GRAPH = 1 << TSK_TRACE_FL_GRAPH_BIT, | |
461 | }; | |
462 | ||
463 | static inline void set_tsk_trace_trace(struct task_struct *tsk) | |
464 | { | |
465 | set_bit(TSK_TRACE_FL_TRACE_BIT, &tsk->trace); | |
466 | } | |
467 | ||
468 | static inline void clear_tsk_trace_trace(struct task_struct *tsk) | |
469 | { | |
470 | clear_bit(TSK_TRACE_FL_TRACE_BIT, &tsk->trace); | |
471 | } | |
472 | ||
473 | static inline int test_tsk_trace_trace(struct task_struct *tsk) | |
474 | { | |
475 | return tsk->trace & TSK_TRACE_FL_TRACE; | |
476 | } | |
477 | ||
478 | static inline void set_tsk_trace_graph(struct task_struct *tsk) | |
479 | { | |
480 | set_bit(TSK_TRACE_FL_GRAPH_BIT, &tsk->trace); | |
481 | } | |
482 | ||
483 | static inline void clear_tsk_trace_graph(struct task_struct *tsk) | |
484 | { | |
485 | clear_bit(TSK_TRACE_FL_GRAPH_BIT, &tsk->trace); | |
486 | } | |
487 | ||
488 | static inline int test_tsk_trace_graph(struct task_struct *tsk) | |
489 | { | |
490 | return tsk->trace & TSK_TRACE_FL_GRAPH; | |
491 | } | |
492 | ||
493 | #endif /* CONFIG_TRACING */ | |
494 | ||
16444a8a | 495 | #endif /* _LINUX_FTRACE_H */ |