diff options
| author | Chengming Zhou <zhouchengming@bytedance.com> | 2022-04-21 00:00:05 +0800 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2022-04-29 19:21:12 +0100 |
| commit | e999995c84c3abb6dcae83f8c35942a8d4ee0451 (patch) | |
| tree | cd20ed9cf9041dec9965695f45520e786eea9f9c /kernel/trace/fgraph.c | |
| parent | b2d229d4ddb17db541098b83524d901257e93845 (diff) | |
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 <zhouchengming@bytedance.com>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20220420160006.17880-1-zhouchengming@bytedance.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'kernel/trace/fgraph.c')
| -rw-r--r-- | kernel/trace/fgraph.c | 18 |
1 files changed, 18 insertions, 0 deletions
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 * |