mirror of https://github.com/nxp-imx/linux-imx.git synced 2025-09-02 18:06:13 +02:00

Steven Rostedt (Google) 3a73333fb3 tracing: Add TRACE_CUSTOM_EVENT() macro

To make it really easy to add custom events from modules, add a
TRACE_CUSTOM_EVENT() macro that acts just like the TRACE_EVENT() macro,
but creates a custom event to an already existing tracepoint.

The trace_custom_sched.[ch] has been updated to use this new macro to show
how simple it is.

Link: https://lkml.kernel.org/r/20220303220625.738622494@goodmis.org

Cc: Ingo Molnar <mingo@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Joel Fernandes <joel@joelfernandes.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

2022-03-11 11:49:24 -05:00

704 B

Raw Permalink Blame History

SPDX-License-Identifier: GPL-2.0-only

builds the trace events example kernel modules;

then to use one (as root): insmod <module_name.ko>

If you include a trace header outside of include/trace/events

then the file that does the #define CREATE_TRACE_POINTS must

have that tracer file in its main search path. This is because

define_trace.h will include it, and must be able to find it from

the include/trace directory.

Here trace-events-sample.c does the CREATE_TRACE_POINTS.

CFLAGS_trace-events-sample.o := -I$(src) CFLAGS_trace_custom_sched.o := -I$(src)

obj-$(CONFIG_SAMPLE_TRACE_EVENTS) += trace-events-sample.o obj-$(CONFIG_SAMPLE_TRACE_CUSTOM_EVENTS) += trace_custom_sched.o

704 B Raw Permalink Blame History