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authorNamhyung Kim <namhyung@kernel.org>2016-08-31 05:55:29 +0300
committerSteven Rostedt <rostedt@goodmis.org>2016-09-01 19:19:40 +0300
commit8861dd303cba879bae9a9dcee74042fb642bf03b (patch)
tree9395c7c589d846cc94cbed3a960131fa15c72db4 /kernel/trace/trace_functions_graph.c
parent613dccdf681aed9f9d1243bb2b8cd864a887802f (diff)
downloadlinux-8861dd303cba879bae9a9dcee74042fb642bf03b.tar.xz
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 'kernel/trace/trace_functions_graph.c')
-rw-r--r--kernel/trace/trace_functions_graph.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index e14017c36170..148c90f1e49b 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -170,7 +170,6 @@ ftrace_push_return_trace(unsigned long ret, unsigned long func, int *depth,
current->ret_stack[index].ret = ret;
current->ret_stack[index].func = func;
current->ret_stack[index].calltime = calltime;
- current->ret_stack[index].subtime = 0;
current->ret_stack[index].fp = frame_pointer;
*depth = current->curr_ret_stack;