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-rw-r--r--kernel/tracepoint.c31
1 files changed, 16 insertions, 15 deletions
diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c
index e95ee7f31d43..68187af4889e 100644
--- a/kernel/tracepoint.c
+++ b/kernel/tracepoint.c
@@ -27,8 +27,8 @@
27#include <linux/sched.h> 27#include <linux/sched.h>
28#include <linux/jump_label.h> 28#include <linux/jump_label.h>
29 29
30extern struct tracepoint __start___tracepoints[]; 30extern struct tracepoint * const __start___tracepoints_ptrs[];
31extern struct tracepoint __stop___tracepoints[]; 31extern struct tracepoint * const __stop___tracepoints_ptrs[];
32 32
33/* Set to 1 to enable tracepoint debug output */ 33/* Set to 1 to enable tracepoint debug output */
34static const int tracepoint_debug; 34static const int tracepoint_debug;
@@ -298,10 +298,10 @@ static void disable_tracepoint(struct tracepoint *elem)
298 * 298 *
299 * Updates the probe callback corresponding to a range of tracepoints. 299 * Updates the probe callback corresponding to a range of tracepoints.
300 */ 300 */
301void 301void tracepoint_update_probe_range(struct tracepoint * const *begin,
302tracepoint_update_probe_range(struct tracepoint *begin, struct tracepoint *end) 302 struct tracepoint * const *end)
303{ 303{
304 struct tracepoint *iter; 304 struct tracepoint * const *iter;
305 struct tracepoint_entry *mark_entry; 305 struct tracepoint_entry *mark_entry;
306 306
307 if (!begin) 307 if (!begin)
@@ -309,12 +309,12 @@ tracepoint_update_probe_range(struct tracepoint *begin, struct tracepoint *end)
309 309
310 mutex_lock(&tracepoints_mutex); 310 mutex_lock(&tracepoints_mutex);
311 for (iter = begin; iter < end; iter++) { 311 for (iter = begin; iter < end; iter++) {
312 mark_entry = get_tracepoint(iter->name); 312 mark_entry = get_tracepoint((*iter)->name);
313 if (mark_entry) { 313 if (mark_entry) {
314 set_tracepoint(&mark_entry, iter, 314 set_tracepoint(&mark_entry, *iter,
315 !!mark_entry->refcount); 315 !!mark_entry->refcount);
316 } else { 316 } else {
317 disable_tracepoint(iter); 317 disable_tracepoint(*iter);
318 } 318 }
319 } 319 }
320 mutex_unlock(&tracepoints_mutex); 320 mutex_unlock(&tracepoints_mutex);
@@ -326,8 +326,8 @@ tracepoint_update_probe_range(struct tracepoint *begin, struct tracepoint *end)
326static void tracepoint_update_probes(void) 326static void tracepoint_update_probes(void)
327{ 327{
328 /* Core kernel tracepoints */ 328 /* Core kernel tracepoints */
329 tracepoint_update_probe_range(__start___tracepoints, 329 tracepoint_update_probe_range(__start___tracepoints_ptrs,
330 __stop___tracepoints); 330 __stop___tracepoints_ptrs);
331 /* tracepoints in modules. */ 331 /* tracepoints in modules. */
332 module_update_tracepoints(); 332 module_update_tracepoints();
333} 333}
@@ -514,8 +514,8 @@ EXPORT_SYMBOL_GPL(tracepoint_probe_update_all);
514 * Will return the first tracepoint in the range if the input tracepoint is 514 * Will return the first tracepoint in the range if the input tracepoint is
515 * NULL. 515 * NULL.
516 */ 516 */
517int tracepoint_get_iter_range(struct tracepoint **tracepoint, 517int tracepoint_get_iter_range(struct tracepoint * const **tracepoint,
518 struct tracepoint *begin, struct tracepoint *end) 518 struct tracepoint * const *begin, struct tracepoint * const *end)
519{ 519{
520 if (!*tracepoint && begin != end) { 520 if (!*tracepoint && begin != end) {
521 *tracepoint = begin; 521 *tracepoint = begin;
@@ -534,7 +534,8 @@ static void tracepoint_get_iter(struct tracepoint_iter *iter)
534 /* Core kernel tracepoints */ 534 /* Core kernel tracepoints */
535 if (!iter->module) { 535 if (!iter->module) {
536 found = tracepoint_get_iter_range(&iter->tracepoint, 536 found = tracepoint_get_iter_range(&iter->tracepoint,
537 __start___tracepoints, __stop___tracepoints); 537 __start___tracepoints_ptrs,
538 __stop___tracepoints_ptrs);
538 if (found) 539 if (found)
539 goto end; 540 goto end;
540 } 541 }
@@ -585,8 +586,8 @@ int tracepoint_module_notify(struct notifier_block *self,
585 switch (val) { 586 switch (val) {
586 case MODULE_STATE_COMING: 587 case MODULE_STATE_COMING:
587 case MODULE_STATE_GOING: 588 case MODULE_STATE_GOING:
588 tracepoint_update_probe_range(mod->tracepoints, 589 tracepoint_update_probe_range(mod->tracepoints_ptrs,
589 mod->tracepoints + mod->num_tracepoints); 590 mod->tracepoints_ptrs + mod->num_tracepoints);
590 break; 591 break;
591 } 592 }
592 return 0; 593 return 0;