diff options
| -rw-r--r-- | include/linux/ftrace_event.h | 8 | ||||
| -rw-r--r-- | include/trace/ftrace.h | 23 | ||||
| -rw-r--r-- | kernel/trace/trace_output.c | 26 |
3 files changed, 38 insertions, 19 deletions
diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h index fd28c170c597..4d79d2dc189c 100644 --- a/include/linux/ftrace_event.h +++ b/include/linux/ftrace_event.h @@ -38,6 +38,12 @@ const char *ftrace_print_symbols_seq_u64(struct trace_seq *p, const char *ftrace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int len); +struct trace_iterator; +struct trace_event; + +int ftrace_raw_output_prep(struct trace_iterator *iter, + struct trace_event *event); + /* * The trace entry - the most basic unit of tracing. This is what * is printed in the end as a single line in the trace output, such as: @@ -95,8 +101,6 @@ enum trace_iter_flags { }; -struct trace_event; - typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter, int flags, struct trace_event *event); diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h index e5d140a91fd7..17a77fcac2a2 100644 --- a/include/trace/ftrace.h +++ b/include/trace/ftrace.h @@ -227,29 +227,18 @@ static notrace enum print_line_t \ ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \ struct trace_event *trace_event) \ { \ - struct ftrace_event_call *event; \ struct trace_seq *s = &iter->seq; \ + struct trace_seq __maybe_unused *p = &iter->tmp_seq; \ struct ftrace_raw_##call *field; \ - struct trace_entry *entry; \ - struct trace_seq *p = &iter->tmp_seq; \ int ret; \ \ - event = container_of(trace_event, struct ftrace_event_call, \ - event); \ - \ - entry = iter->ent; \ + field = (typeof(field))iter->ent; \ \ - if (entry->type != event->event.type) { \ - WARN_ON_ONCE(1); \ - return TRACE_TYPE_UNHANDLED; \ - } \ - \ - field = (typeof(field))entry; \ - \ - trace_seq_init(p); \ - ret = trace_seq_printf(s, "%s: ", event->name); \ + ret = ftrace_raw_output_prep(iter, trace_event); \ if (ret) \ - ret = trace_seq_printf(s, print); \ + return ret; \ + \ + ret = trace_seq_printf(s, print); \ if (!ret) \ return TRACE_TYPE_PARTIAL_LINE; \ \ diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c index 194d79602dc7..aa92ac322ba2 100644 --- a/kernel/trace/trace_output.c +++ b/kernel/trace/trace_output.c @@ -397,6 +397,32 @@ ftrace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len) } EXPORT_SYMBOL(ftrace_print_hex_seq); +int ftrace_raw_output_prep(struct trace_iterator *iter, + struct trace_event *trace_event) +{ + struct ftrace_event_call *event; + struct trace_seq *s = &iter->seq; + struct trace_seq *p = &iter->tmp_seq; + struct trace_entry *entry; + int ret; + + event = container_of(trace_event, struct ftrace_event_call, event); + entry = iter->ent; + + if (entry->type != event->event.type) { + WARN_ON_ONCE(1); + return TRACE_TYPE_UNHANDLED; + } + + trace_seq_init(p); + ret = trace_seq_printf(s, "%s: ", event->name); + if (!ret) + return TRACE_TYPE_PARTIAL_LINE; + + return 0; +} +EXPORT_SYMBOL(ftrace_raw_output_prep); + #ifdef CONFIG_KRETPROBES static inline const char *kretprobed(const char *name) { |