Re: [PATCH 2/2] tracing: Export ftrace API for kernel modules

Peter Zijlstra
2009-09-15T10:11:43Z

On Tue, 2009-09-15 at 19:06 +0900, Atsushi Tsuji wrote:
> Export register_ and unresgister_ftrace_function_probe to modules. This can
> be used by SystemTap.

Its unusual to export bits without an in-kernel user.

> Signed-off-by: Atsushi Tsuji <a-tsuji@bk.jp.nec.com>
> ---
> kernel/trace/ftrace.c | 2 ++
> 1 files changed, 2 insertions(+), 0 deletions(-)
>
> diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
> index 5ef8f59..9c32291 100644
> --- a/kernel/trace/ftrace.c
> +++ b/kernel/trace/ftrace.c
> @@ -2042,6 +2042,7 @@ register_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
>
> return count;
> }
> +EXPORT_SYMBOL_GPL(register_ftrace_function_probe);
>
> enum {
> PROBE_TEST_FUNC = 1,
> @@ -2108,6 +2109,7 @@ unregister_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
> __unregister_ftrace_function_probe(glob, ops, data,
> PROBE_TEST_FUNC | PROBE_TEST_DATA);
> }
> +EXPORT_SYMBOL_GPL(unregister_ftrace_function_probe);
>
> void
> unregister_ftrace_function_probe_func(char *glob, struct ftrace_probe_ops *ops)