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From: Roland Dreier <rolandd@cisco.com>
To: Andi Kleen <ak@suse.de>
Cc: "Martin J. Bligh" <mbligh@mbligh.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	discuss@x86-64.org
Subject: Re: [PATCH] x86_64: Work around Re: 2.6.14-git1 (and -git2) build failure on AMD64
Date: Sun, 30 Oct 2005 08:32:28 -0800	[thread overview]
Message-ID: <523bmjnexv.fsf@cisco.com> (raw)
In-Reply-To: <200510301723.31561.ak@suse.de> (Andi Kleen's message of "Sun, 30 Oct 2005 17:23:31 +0100")

    Andi> While not correct I don't see how it should guarantee it
    Andi> will work around that gcc bug on all possible gcc versions
    Andi> (which show different behaviour) My patch is more
    Andi> conservative and safer.

What's the gcc bug?  The current fixup.c code is asking gcc to put
toshiba_ohci1394_dmi_table[] in the .init.text section.  This makes
gcc think that .init.text contains writable data.  Then some other
declaration in the file asks gcc to put a function in .init.text.  gcc
correctly complains that text and writable data can't share a section.

If we fix toshiba_ohci1394_dmi_table[] to go into .init.data as is
intended, then gcc is happy.

The only thing remotely like a gcc bug is that the diagnostic gcc
prints does not flag toshiba_ohci1394_dmi_table[] as the problem.

Admittedly I have only tested gcc 4.0 and gcc 3.4, but given that no
one reported this problem before toshiba_ohci1394_dmi_table[] was
added, and that the __devinit declaration of an array is obviously
wrong and would cause exactly this sort of section conflict, I think
we should at least try the correct fix.

 - R.

  reply	other threads:[~2005-10-30 16:32 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-10-30 14:03 2.6.14-git1 (and -git2) build failure on AMD64 Martin J. Bligh
2005-10-30 14:17 ` Roland Dreier
2005-10-30 15:28 ` Andi Kleen
2005-10-30 15:50   ` Martin J. Bligh
2005-10-30 16:15   ` Roland Dreier
2005-10-30 15:49 ` [PATCH] x86_64: Work around " Andi Kleen
2005-10-30 16:17   ` Roland Dreier
2005-10-30 16:23     ` Andi Kleen
2005-10-30 16:32       ` Roland Dreier [this message]
2005-11-02  5:16     ` Martin J. Bligh

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