diff options
Diffstat (limited to 'kernel/tracepoint.c')
| -rw-r--r-- | kernel/tracepoint.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c index c77f3eceea25..e95ee7f31d43 100644 --- a/kernel/tracepoint.c +++ b/kernel/tracepoint.c | |||
| @@ -25,6 +25,7 @@ | |||
| 25 | #include <linux/err.h> | 25 | #include <linux/err.h> |
| 26 | #include <linux/slab.h> | 26 | #include <linux/slab.h> |
| 27 | #include <linux/sched.h> | 27 | #include <linux/sched.h> |
| 28 | #include <linux/jump_label.h> | ||
| 28 | 29 | ||
| 29 | extern struct tracepoint __start___tracepoints[]; | 30 | extern struct tracepoint __start___tracepoints[]; |
| 30 | extern struct tracepoint __stop___tracepoints[]; | 31 | extern struct tracepoint __stop___tracepoints[]; |
| @@ -263,7 +264,13 @@ static void set_tracepoint(struct tracepoint_entry **entry, | |||
| 263 | * is used. | 264 | * is used. |
| 264 | */ | 265 | */ |
| 265 | rcu_assign_pointer(elem->funcs, (*entry)->funcs); | 266 | rcu_assign_pointer(elem->funcs, (*entry)->funcs); |
| 266 | elem->state = active; | 267 | if (!elem->state && active) { |
| 268 | jump_label_enable(&elem->state); | ||
| 269 | elem->state = active; | ||
| 270 | } else if (elem->state && !active) { | ||
| 271 | jump_label_disable(&elem->state); | ||
| 272 | elem->state = active; | ||
| 273 | } | ||
| 267 | } | 274 | } |
| 268 | 275 | ||
| 269 | /* | 276 | /* |
| @@ -277,7 +284,10 @@ static void disable_tracepoint(struct tracepoint *elem) | |||
| 277 | if (elem->unregfunc && elem->state) | 284 | if (elem->unregfunc && elem->state) |
| 278 | elem->unregfunc(); | 285 | elem->unregfunc(); |
| 279 | 286 | ||
| 280 | elem->state = 0; | 287 | if (elem->state) { |
| 288 | jump_label_disable(&elem->state); | ||
| 289 | elem->state = 0; | ||
| 290 | } | ||
| 281 | rcu_assign_pointer(elem->funcs, NULL); | 291 | rcu_assign_pointer(elem->funcs, NULL); |
| 282 | } | 292 | } |
| 283 | 293 | ||
