Message-ID: <496F69C8.2040103@zytor.com>
Date: Thu, 15 Jan 2009 08:52:24 -0800
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Cyrill Gorcunov <gorcunov@gmail.com>
CC: "Metzger, Markus T" <markus.t.metzger@intel.com>,
       "mingo@elte.hu" <mingo@elte.hu>,
       "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
       "harvey.harrison@gmail.com" <harvey.harrison@gmail.com>,
       "sam@ravnborg.org" <sam@ravnborg.org>,
       "jaswinderrajput@gmail.com" <jaswinderrajput@gmail.com>
Subject: Re: [patch 3/5] x86: headers cleanup - ptrace-abi.h
References: <20090114203745.285473388@gmail.com>> <496e4e23.0c07560a.5e4e.529c@mx.google.com> <496E6585.8050505@zytor.com> <928CFBE8E7CB0040959E56B4EA41A77E0CD9CD33@irsmsx504.ger.corp.intel.com> <20090115084110.GB9032@localhost>
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Cyrill Gorcunov wrote:
> 
> Hi Markus,
> 
> since it's supposed to be visible by userspace then we
> should just remove this CONFIG_X86_PTRACE_BTS so if userspace
> app has a reference to ptrace_bts_config but kernel in turn has
> this feature turned off -- the uerspace app shouldn't fail
> while being compiling.
> 

Well, for userspace, the kernel configuration doesn't matter: the
CONFIG_* macros *never* exist.

This would be yet another good reason why having them be always defined
and 0/1 instead would be such an improvement, but we're not there.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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