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Add __field_hex
[lttng-modules.git]
/
probes
/
lttng-ftrace.c
diff --git
a/probes/lttng-ftrace.c
b/probes/lttng-ftrace.c
index c18a4702c90be4d8df6ef06490b2445385ed7e4d..1aa71831e86fd4bd21780278bb78d385f79ebc8b 100644
(file)
--- a/
probes/lttng-ftrace.c
+++ b/
probes/lttng-ftrace.c
@@
-11,6
+11,10
@@
* Ftrace function tracer does not seem to provide synchronization between probe
* teardown and callback execution. Therefore, we make this module permanently
* loaded (unloadable).
* Ftrace function tracer does not seem to provide synchronization between probe
* teardown and callback execution. Therefore, we make this module permanently
* loaded (unloadable).
+ *
+ * TODO: Move to register_ftrace_function() (which is exported for
+ * modules) for Linux >= 3.0. It is faster (only enables the selected
+ * functions), and will stay there.
*/
#include <linux/module.h>
*/
#include <linux/module.h>
@@
-34,9
+38,14
@@
void lttng_ftrace_handler(unsigned long ip, unsigned long parent_ip, void **data
} payload;
int ret;
} payload;
int ret;
- if (!ACCESS_ONCE(chan->session->active))
+ if (unlikely(!ACCESS_ONCE(chan->session->active)))
+ return;
+ if (unlikely(!ACCESS_ONCE(chan->enabled)))
return;
return;
- lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL,
+ if (unlikely(!ACCESS_ONCE(event->enabled)))
+ return;
+
+ lib_ring_buffer_ctx_init(&ctx, chan->chan, event,
sizeof(payload), ltt_alignof(payload), -1);
ret = chan->ops->event_reserve(&ctx, event->id);
if (ret < 0)
sizeof(payload), ltt_alignof(payload), -1);
ret = chan->ops->event_reserve(&ctx, event->id);
if (ret < 0)
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