linux-kernel - Re: [PATCH] perf: x86: fix callgraphs of 32-bit processes on 64-bit kernels V3.

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Date:	Wed, 17 Mar 2010 10:54:56 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	T??r??k Edwin <edwintorok@...il.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>, x86@...nel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf: x86: fix callgraphs of 32-bit processes on 64-bit
 kernels V3.


* T??r??k Edwin <edwintorok@...il.com> wrote:

> +#ifdef CONFIG_COMPAT
> +	if (test_thread_flag(TIF_IA32)) {
> +		perf_callchain_user32(regs, entry);
> +		return;
> +	}
> +#endif

You can push that test into perf_callchain_user32() and turn it into something 
like:

	if (perf_callchain_user32(regs, entry))
		return;

without the #ifdef here.

	Ingo
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