diff options
| author | Steven Rostedt <srostedt@redhat.com> | 2008-12-23 23:24:13 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-29 12:46:12 +0100 |
| commit | f633cef0200bbaec539e2dbb0bc4bed7f022f98b (patch) | |
| tree | 725d0b181b8e417303e27fa9e62d06b780fe4934 /kernel/trace/trace_output.h | |
| parent | f0868d1e23a8efec33beb3aa688aab7fdb1ae093 (diff) | |
ftrace: change trace.c to use registered events
Impact: rework trace.c to use new event register API
Almost every ftrace event has to implement its output display in
trace.c through a different function. Some events did not handle
all the formats (trace, latency-trace, raw, hex, binary), and
this method does not scale well.
This patch converts the format functions to use the event API to
find the event and and print its format. Currently, we have
a print function for trace, latency_trace, raw, hex and binary.
A trace_nop_print is available if the event wants to avoid output
on a particular format.
Perhaps other tracers could use this in the future (like mmiotrace and
function_graph).
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace/trace_output.h')
| -rw-r--r-- | kernel/trace/trace_output.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/trace/trace_output.h b/kernel/trace/trace_output.h index 1fcc76e1378e..ecab4ea4a4fd 100644 --- a/kernel/trace/trace_output.h +++ b/kernel/trace/trace_output.h @@ -36,8 +36,24 @@ struct trace_event *ftrace_find_event(int type); int register_ftrace_event(struct trace_event *event); int unregister_ftrace_event(struct trace_event *event); +int +trace_nop_print(struct trace_seq *s, struct trace_entry *entry, int flags); + #define MAX_MEMHEX_BYTES 8 #define HEX_CHARS (MAX_MEMHEX_BYTES*2 + 1) +#define SEQ_PUT_FIELD_RET(s, x) \ +do { \ + if (!trace_seq_putmem(s, &(x), sizeof(x))) \ + return 0; \ +} while (0) + +#define SEQ_PUT_HEX_FIELD_RET(s, x) \ +do { \ + BUILD_BUG_ON(sizeof(x) > MAX_MEMHEX_BYTES); \ + if (!trace_seq_putmem_hex(s, &(x), sizeof(x))) \ + return 0; \ +} while (0) + #endif |