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Re: [Xen-devel] Errors when build 2.6.31-rc8

To: Boris Derzhavets <bderzhavets@xxxxxxxxx>
Subject: Re: [Xen-devel] Errors when build 2.6.31-rc8
From: M A Young <m.a.young@xxxxxxxxxxxx>
Date: Sat, 5 Sep 2009 12:31:59 +0100 (BST)
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
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On Sat, 5 Sep 2009, Boris Derzhavets wrote:

After fresh git clone, git checkout tune "make menuconfig" the same way as
for RC6

When build :-

In file included from /usr/src/linux-2.6-xen/arch/x86/include/asm/agp.h:5,
                 from drivers/gpu/drm/ttm/ttm_agp_backend.c:40:
include/linux/swiotlb.h:48: warning: ?enum dma_data_direction? declared inside
parameter list

I think there is a conflict between the newer drm code and swiotlb. I have seen this for a while on my Fedora builds as Fedora Rawhide seems to get the new drm code before it makes it into the official kernel. You can work around it by disabling a small number of drm related kernel options, though you probably lose some functionality by doing so.

        Michael Young
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