From: Li Huafei Date: Wed, 27 Apr 2022 03:41:19 +0000 (+0800) Subject: tracing: Reset the function filter after completing trampoline/graph selftest X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e35c2d8e22745751cf304ec3fe39616643db2e0a;p=linux.git 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: 130c08065848 ("tracing: Add trampoline/graph selftest") Signed-off-by: Li Huafei Signed-off-by: Steven Rostedt (Google) --- 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 */