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tracing: update comments to match event code macros

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Impact: clean up / comments

The comments that described the ftrace macros to manipulate the
TRACE_EVENT and TRACE_FORMAT macros no longer match the code.
This patch updates them.

Reported-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
This commit is contained in:
Steven Rostedt 2009-03-10 13:12:58 -04:00
parent 823f9124fb
commit 0e3d0f0566
3 changed files with 12 additions and 11 deletions
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6
kernel/trace/trace_events_stage_1.h
View File

@ -6,11 +6,13 @@
* struct ftrace_raw_<call> {
* struct trace_entry ent;
* <type> <item>;
* <type2> <item2>[<len>];
* [...]
* };
*
* The <type> <item> is created by the TRACE_FIELD(type, item, assign)
* macro. We simply do "type item;", and that will create the fields
* The <type> <item> is created by the __field(type, item) macro or
* the __array(type2, item2, len) macro.
* We simply do "type item;", and that will create the fields
* in the structure.
*/

9
kernel/trace/trace_events_stage_2.h
View File

@ -20,7 +20,7 @@
*
* field = (typeof(field))entry;
*
* ret = trace_seq_printf(s, <TP_RAW_FMT> "%s", <ARGS> "\n");
* ret = trace_seq_printf(s, <TP_printk> "\n");
* if (!ret)
* return TRACE_TYPE_PARTIAL_LINE;
*
@ -76,10 +76,9 @@ ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \
* int ret;
*
* ret = trace_seq_printf(s, #type " " #item ";"
* " size:%d; offset:%d;\n",
* sizeof(field.type),
* offsetof(struct ftrace_raw_##call,
* item));
* " offset:%u; size:%u;\n",
* offsetof(struct ftrace_raw_##call, item),
* sizeof(field.type));
*
* }
*/

8
kernel/trace/trace_events_stage_3.h
View File

@ -56,7 +56,8 @@
* return;
* entry = ring_buffer_event_data(event);
*
* <tstruct>; <-- Here we assign the entries by the TRACE_FIELD.
* <assign>; <-- Here we assign the entries by the __field and
* __array macros.
*
* trace_current_buffer_unlock_commit(event, irq_flags, pc);
* }
@ -96,11 +97,10 @@
* __attribute__((__aligned__(4)))
* __attribute__((section("_ftrace_events"))) event_<call> = {
* .name = "<call>",
* .system = "<system>",
* .raw_init = ftrace_raw_init_event_<call>,
* .regfunc = ftrace_reg_event_<call>,
* .unregfunc = ftrace_unreg_event_<call>,
* .raw_init = ftrace_raw_init_event_<call>,
* .raw_reg = ftrace_raw_reg_event_<call>,
* .raw_unreg = ftrace_raw_unreg_event_<call>,
* .show_format = ftrace_format_<call>,
* }
*