From e999995c84c3abb6dcae83f8c35942a8d4ee0451 Mon Sep 17 00:00:00 2001 From: Chengming Zhou Date: Thu, 21 Apr 2022 00:00:05 +0800 Subject: ftrace: cleanup ftrace_graph_caller enable and disable The ftrace_[enable,disable]_ftrace_graph_caller() are used to do special hooks for graph tracer, which are not needed on some ARCHs that use graph_ops:func function to install return_hooker. So introduce the weak version in ftrace core code to cleanup in x86. Signed-off-by: Chengming Zhou Acked-by: Steven Rostedt (Google) Acked-by: Mark Rutland Link: https://lore.kernel.org/r/20220420160006.17880-1-zhouchengming@bytedance.com Signed-off-by: Catalin Marinas --- kernel/trace/fgraph.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'kernel/trace') diff --git a/kernel/trace/fgraph.c b/kernel/trace/fgraph.c index 8f4fb328133a..289311680c29 100644 --- a/kernel/trace/fgraph.c +++ b/kernel/trace/fgraph.c @@ -30,6 +30,24 @@ int ftrace_graph_active; /* Both enabled by default (can be cleared by function_graph tracer flags */ static bool fgraph_sleep_time = true; +/* + * archs can override this function if they must do something + * to enable hook for graph tracer. + */ +int __weak ftrace_enable_ftrace_graph_caller(void) +{ + return 0; +} + +/* + * archs can override this function if they must do something + * to disable hook for graph tracer. + */ +int __weak ftrace_disable_ftrace_graph_caller(void) +{ + return 0; +} + /** * ftrace_graph_stop - set to permanently disable function graph tracing * -- cgit v1.2.3