diff options
| author | Masami Hiramatsu <mhiramat@kernel.org> | 2020-10-15 16:55:16 +0200 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2021-02-11 22:31:57 +0100 |
| commit | 1600cbcf6944dee9f87f52cbceb0b6895c29efd0 (patch) | |
| tree | 7b1282ba5db59de0f9d3db54383c577ff7f8f0eb /include/trace/trace_events.h | |
| parent | tracing: Show real address for trace event arguments (diff) | |
| download | linux-1600cbcf6944dee9f87f52cbceb0b6895c29efd0.tar.xz linux-1600cbcf6944dee9f87f52cbceb0b6895c29efd0.zip | |
tracing: Update the stage 3 of trace event macro comment
Update the comment of the 3rd stage of trace event macro
expansion code. Now there are 2 macros makes different
trace_raw_output_<call>() functions.
Link: https://lkml.kernel.org/r/160277371605.29307.8586817119278606720.stgit@devnote2
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'include/trace/trace_events.h')
| -rw-r--r-- | include/trace/trace_events.h | 29 |
1 files changed, 20 insertions, 9 deletions
diff --git a/include/trace/trace_events.h b/include/trace/trace_events.h index e6a8b3febc49..8268bf747d6f 100644 --- a/include/trace/trace_events.h +++ b/include/trace/trace_events.h @@ -231,9 +231,11 @@ TRACE_MAKE_SYSTEM_STR(); * { * struct trace_seq *s = &iter->seq; * struct trace_event_raw_<call> *field; <-- defined in stage 1 - * struct trace_entry *entry; * struct trace_seq *p = &iter->tmp_seq; - * int ret; + * + * -------(for event)------- + * + * struct trace_entry *entry; * * entry = iter->ent; * @@ -245,14 +247,23 @@ TRACE_MAKE_SYSTEM_STR(); * field = (typeof(field))entry; * * trace_seq_init(p); - * ret = trace_seq_printf(s, "%s: ", <call>); - * if (ret) - * ret = trace_seq_printf(s, <TP_printk> "\n"); - * if (!ret) - * return TRACE_TYPE_PARTIAL_LINE; + * return trace_output_call(iter, <call>, <TP_printk> "\n"); * - * return TRACE_TYPE_HANDLED; - * } + * ------(or, for event class)------ + * + * int ret; + * + * field = (typeof(field))iter->ent; + * + * ret = trace_raw_output_prep(iter, trace_event); + * if (ret != TRACE_TYPE_HANDLED) + * return ret; + * + * trace_event_printf(iter, <TP_printk> "\n"); + * + * return trace_handle_return(s); + * ------- + * } * * This is the method used to print the raw event to the trace * output format. Note, this is not needed if the data is read |