OF IOAPIC bindings compile error

[Daniel Drake]

Hi,

Testing linux-2.6-x86.git, I encountered a compile error which seems
to caused by the following commit with X86_IO_APIC=n:

commit bcc7c1244fcfd852b9f4590935491057e1cab9dd
Author: Sebastian Andrzej Siewior <bigeasy at linutronix.de>
Date:   Tue Feb 22 21:07:44 2011 +0100

    x86: ioapic: Add OF bindings for IO_APIC

Error is:
arch/x86/kernel/devicetree.c: In function ‘x86_dtb_find_config’:
arch/x86/kernel/devicetree.c:288:3: error: lvalue required as left
operand of assignment

It can be fixed by inserting #ifdef CONFIG_X86_IO_APIC inside
x86_dtb_find_config, but I'm not sure if this is the correct approach.

.config file in question:
http://dev.laptop.org/~dsd/20110225/ioioapic-problem-config.txt

Daniel