From 37ea53c9b74a6432a869b8f4addbc1b32c461d08 Mon Sep 17 00:00:00 2001 From: Li Huafei Date: Wed, 27 Apr 2022 11:41:19 +0800 Subject: [PATCH] tracing: Reset the function filter after completing trampoline/graph selftest The direct trampoline and graph coexistence test sets global_ops to trace only 'trace_selftest_dynamic_test_func', but does not reset it after the test is completed, resulting in the function filter being set already after the system starts. Although it can be reset through the tracefs interface, it is more or less confusing to the user, and we should reset it to trace all functions after the trampoline/graph test completes. Link: https://lkml.kernel.org/r/20220427034119.24668-1-lihuafei1@huawei.com Link: https://lore.kernel.org/all/20220418073958.104029-1-lihuafei1@huawei.com/ Fixes: 247f6510e357 ("tracing: Add trampoline/graph selftest") Signed-off-by: Li Huafei Signed-off-by: Steven Rostedt (Google) --- kernel/trace/trace_selftest.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/trace/trace_selftest.c b/kernel/trace/trace_selftest.c index abcadbe933bb7..a2d301f58ceda 100644 --- a/kernel/trace/trace_selftest.c +++ b/kernel/trace/trace_selftest.c @@ -895,6 +895,9 @@ trace_selftest_startup_function_graph(struct tracer *trace, ret = -1; goto out; } + + /* Enable tracing on all functions again */ + ftrace_set_global_filter(NULL, 0, 1); #endif /* Don't test dynamic tracing, the function tracer already did */ -- 2.39.5