linux-kernel - Re: [PATCH 2/3] kprobes/trace: Fix kprobe selftest for gcc 4.6

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Date:	Tue, 07 Jun 2011 14:12:57 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	David Daney <ddaney.cavm@...il.com>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Subject: Re: [PATCH 2/3] kprobes/trace: Fix kprobe selftest for gcc 4.6

On Tue, 2011-06-07 at 11:08 -0700, David Daney wrote:

> > -static int kprobe_trace_selftest_target(int a1, int a2, int a3,
> > -					int a4, int a5, int a6)
> > +/*
> > + * Can't be static, otherwise gcc might optimize this to
> > + * not be in the kallsyms table.
> > + */
> 
> Could you make it '__used' instead?
> 

I can try, but the problem is not that the function itself is being
optimized out. It looks like its being turned into anonymous text. That
is, it optimized out the symbol name, not the code itself.

-- Steve


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