ftrace: Provide API to use global filtering for ftrace ops
Currently the global_ops filtering hash is not available to outside users registering for function tracing. Provide an API for those users to be able to choose global filtering. This is in preparation for pstore's ftrace feature to be able to use the global filters. Suggested-by: NSteven Rostedt <rostedt@goodmis.org> Cc: Anton Vorontsov <anton@enomsg.org> Cc: Colin Cross <ccross@android.com> Cc: Kees Cook <keescook@chromium.org> Cc: Tony Luck <tony.luck@intel.com> Signed-off-by: NJoel Fernandes <joelaf@google.com> Acked-by: NSteven Rostedt <rostedt@goodmis.org> Signed-off-by: NKees Cook <keescook@chromium.org>
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