Commit 50354a8a authored by Li Zefan's avatar Li Zefan Committed by Steven Rostedt
Browse files

tracing: Update comments



Make some comments consistent with the code.
Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
LKML-Reference: <4BA97FD0.7090202@cn.fujitsu.com>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent 4bdde044
......@@ -154,9 +154,11 @@
*
* field = (typeof(field))entry;
*
* p = get_cpu_var(ftrace_event_seq);
* p = &get_cpu_var(ftrace_event_seq);
* trace_seq_init(p);
* ret = trace_seq_printf(s, <TP_printk> "\n");
* ret = trace_seq_printf(s, "%s: ", <call>);
* if (ret)
* ret = trace_seq_printf(s, <TP_printk> "\n");
* put_cpu();
* if (!ret)
* return TRACE_TYPE_PARTIAL_LINE;
......@@ -450,38 +452,38 @@ perf_trace_disable_##name(struct ftrace_event_call *unused) \
*
* static void ftrace_raw_event_<call>(proto)
* {
* struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
* struct ring_buffer_event *event;
* struct ftrace_raw_<call> *entry; <-- defined in stage 1
* struct ring_buffer *buffer;
* unsigned long irq_flags;
* int __data_size;
* int pc;
*
* local_save_flags(irq_flags);
* pc = preempt_count();
*
* __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
*
* event = trace_current_buffer_lock_reserve(&buffer,
* event_<call>.id,
* sizeof(struct ftrace_raw_<call>),
* sizeof(*entry) + __data_size,
* irq_flags, pc);
* if (!event)
* return;
* entry = ring_buffer_event_data(event);
*
* <assign>; <-- Here we assign the entries by the __field and
* __array macros.
* { <assign>; } <-- Here we assign the entries by the __field and
* __array macros.
*
* trace_current_buffer_unlock_commit(buffer, event, irq_flags, pc);
* if (!filter_current_check_discard(buffer, event_call, entry, event))
* trace_current_buffer_unlock_commit(buffer,
* event, irq_flags, pc);
* }
*
* static int ftrace_raw_reg_event_<call>(struct ftrace_event_call *unused)
* {
* int ret;
*
* ret = register_trace_<call>(ftrace_raw_event_<call>);
* if (!ret)
* pr_info("event trace: Could not activate trace point "
* "probe to <call>");
* return ret;
* return register_trace_<call>(ftrace_raw_event_<call>);
* }
*
* static void ftrace_unreg_event_<call>(struct ftrace_event_call *unused)
......@@ -493,6 +495,8 @@ perf_trace_disable_##name(struct ftrace_event_call *unused) \
* .trace = ftrace_raw_output_<call>, <-- stage 2
* };
*
* static const char print_fmt_<call>[] = <TP_printk>;
*
* static struct ftrace_event_call __used
* __attribute__((__aligned__(4)))
* __attribute__((section("_ftrace_events"))) event_<call> = {
......@@ -501,6 +505,8 @@ perf_trace_disable_##name(struct ftrace_event_call *unused) \
* .raw_init = trace_event_raw_init,
* .regfunc = ftrace_reg_event_<call>,
* .unregfunc = ftrace_unreg_event_<call>,
* .print_fmt = print_fmt_<call>,
* .define_fields = ftrace_define_fields_<call>,
* }
*
*/
......@@ -569,7 +575,6 @@ ftrace_raw_event_id_##call(struct ftrace_event_call *event_call, \
return; \
entry = ring_buffer_event_data(event); \
\
\
tstruct \
\
{ assign; } \
......
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