diff options
Diffstat (limited to 'samples/trace_events/trace-events-sample.h')
| -rw-r--r-- | samples/trace_events/trace-events-sample.h | 42 |
1 files changed, 23 insertions, 19 deletions
diff --git a/samples/trace_events/trace-events-sample.h b/samples/trace_events/trace-events-sample.h index 9977a756fb3..4b0113f73ee 100644 --- a/samples/trace_events/trace-events-sample.h +++ b/samples/trace_events/trace-events-sample.h @@ -1,23 +1,6 @@ /* - * Notice that this file is not protected like a normal header. - * We also must allow for rereading of this file. The - * - * || defined(TRACE_HEADER_MULTI_READ) - * - * serves this purpose. - */ -#if !defined(_TRACE_EVENT_SAMPLE_H) || defined(TRACE_HEADER_MULTI_READ) -#define _TRACE_EVENT_SAMPLE_H - -/* - * All trace headers should include tracepoint.h, until we finally - * make it into a standard header. - */ -#include <linux/tracepoint.h> - -/* * If TRACE_SYSTEM is defined, that will be the directory created - * in the ftrace directory under /debugfs/tracing/events/<system> + * in the ftrace directory under /sys/kernel/debug/tracing/events/<system> * * The define_trace.h below will also look for a file name of * TRACE_SYSTEM.h where TRACE_SYSTEM is what is defined here. @@ -34,11 +17,31 @@ * #define TRACE_INCLUDE_FILE trace-events-sample * * As we do an the bottom of this file. + * + * Notice that TRACE_SYSTEM should be defined outside of #if + * protection, just like TRACE_INCLUDE_FILE. */ #undef TRACE_SYSTEM #define TRACE_SYSTEM sample /* + * Notice that this file is not protected like a normal header. + * We also must allow for rereading of this file. The + * + * || defined(TRACE_HEADER_MULTI_READ) + * + * serves this purpose. + */ +#if !defined(_TRACE_EVENT_SAMPLE_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_EVENT_SAMPLE_H + +/* + * All trace headers should include tracepoint.h, until we finally + * make it into a standard header. + */ +#include <linux/tracepoint.h> + +/* * The TRACE_EVENT macro is broken up into 5 parts. * * name: name of the trace point. This is also how to enable the tracepoint. @@ -53,7 +56,8 @@ * struct: This defines the way the data will be stored in the ring buffer. * There are currently two types of elements. __field and __array. * a __field is broken up into (type, name). Where type can be any - * type but an array. + * primitive type (integer, long or pointer). __field_struct() can + * be any static complex data value (struct, union, but not an array). * For an array. there are three fields. (type, name, size). The * type of elements in the array, the name of the field and the size * of the array. |