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authorNamhyung Kim <namhyung@kernel.org>2016-08-31 11:55:29 +0900
committerSteven Rostedt <rostedt@goodmis.org>2016-09-01 12:19:40 -0400
commit8861dd303cba879bae9a9dcee74042fb642bf03b (patch)
tree9395c7c589d846cc94cbed3a960131fa15c72db4 /include/linux/ftrace.h
parent613dccdf681aed9f9d1243bb2b8cd864a887802f (diff)
ftrace: Access ret_stack->subtime only in the function profiler
The subtime is used only for function profiler with function graph tracer enabled. Move the definition of subtime under CONFIG_FUNCTION_PROFILER to reduce the memory usage. Also move the initialization of subtime into the graph entry callback. Link: http://lkml.kernel.org/r/20160831025529.24018-1-namhyung@kernel.org Cc: Ingo Molnar <mingo@kernel.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'include/linux/ftrace.h')
-rw-r--r--include/linux/ftrace.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 7d565afe35d2..1e2b316d6693 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -794,7 +794,9 @@ struct ftrace_ret_stack {
unsigned long ret;
unsigned long func;
unsigned long long calltime;
+#ifdef CONFIG_FUNCTION_PROFILER
unsigned long long subtime;
+#endif
unsigned long fp;
};