Re: [PATCH] tracing/profile: Fix profile_disable vs module_unload

From: Peter Zijlstra
Date: Wed Aug 26 2009 - 03:02:45 EST

On Wed, 2009-08-26 at 08:46 +0200, Peter Zijlstra wrote:

> Aahh, I see the bug, its only ftrace that knows about the module, not
> tracepoints themselves, _that_ needs fixing.

You could possibly do something like:

struct module *tp_mod = __module_address(&some_tp_symbol);
struct module *cb_mod = __module_text_address(func);

if (tp_mod && tp_mod != cb_mod) {
ret = try_get_module(tp_mod);
if (ret)
goto fail;

in register_trace_##name() or thereabout.
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