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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-21 19:54:49 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-21 19:54:49 (GMT) |
| commit | 5d70f79b5ef6ea2de4f72a37b2d96e2601e40a22 (patch) | |
| tree | a0d6de0930ba83ecf4629c2e2e261f5eaa2d8f33 /kernel/tracepoint.c | |
| parent | 888a6f77e0418b049f83d37547c209b904d30af4 (diff) | |
| parent | 750ed158bf6c782d2813da1bca2c824365a0b777 (diff) | |
| download | linux-5d70f79b5ef6ea2de4f72a37b2d96e2601e40a22.tar.xz | |
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (163 commits)
tracing: Fix compile issue for trace_sched_wakeup.c
[S390] hardirq: remove pointless header file includes
[IA64] Move local_softirq_pending() definition
perf, powerpc: Fix power_pmu_event_init to not use event->ctx
ftrace: Remove recursion between recordmcount and scripts/mod/empty
jump_label: Add COND_STMT(), reducer wrappery
perf: Optimize sw events
perf: Use jump_labels to optimize the scheduler hooks
jump_label: Add atomic_t interface
jump_label: Use more consistent naming
perf, hw_breakpoint: Fix crash in hw_breakpoint creation
perf: Find task before event alloc
perf: Fix task refcount bugs
perf: Fix group moving
irq_work: Add generic hardirq context callbacks
perf_events: Fix transaction recovery in group_sched_in()
perf_events: Fix bogus AMD64 generic TLB events
perf_events: Fix bogus context time tracking
tracing: Remove parent recording in latency tracer graph options
tracing: Use one prologue for the preempt irqs off tracer function tracers
...
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 c77f3ec..e95ee7f 100644 --- a/kernel/tracepoint.c +++ b/kernel/tracepoint.c @@ -25,6 +25,7 @@ #include <linux/err.h> #include <linux/slab.h> #include <linux/sched.h> +#include <linux/jump_label.h> extern struct tracepoint __start___tracepoints[]; extern struct tracepoint __stop___tracepoints[]; @@ -263,7 +264,13 @@ static void set_tracepoint(struct tracepoint_entry **entry, * is used. */ rcu_assign_pointer(elem->funcs, (*entry)->funcs); - elem->state = active; + if (!elem->state && active) { + jump_label_enable(&elem->state); + elem->state = active; + } else if (elem->state && !active) { + jump_label_disable(&elem->state); + elem->state = active; + } } /* @@ -277,7 +284,10 @@ static void disable_tracepoint(struct tracepoint *elem) if (elem->unregfunc && elem->state) elem->unregfunc(); - elem->state = 0; + if (elem->state) { + jump_label_disable(&elem->state); + elem->state = 0; + } rcu_assign_pointer(elem->funcs, NULL); } |