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Subject: 2.6.19-rc4-mm2 build breakage on ia64
From: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
To: Andrew Morton <akpm@osdl.org>, linux-kernel <linux-kernel@vger.kernel.org>
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Date: Thu, 02 Nov 2006 11:15:23 -0500
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Just a heads up, as I haven't seen anything on the mailing list.  Build
of '19-rc4-mm2, with the one existing 'acpi-verify-lapic...' hotfix,
breaks on ia64 because generic file drivers/acpi/processor_idle.c
includes <asm/apic.h>.  ia64 uses acpi in which processor_idle.[co] is
not optional, but has no arch specific apic.h [in this tree, anyway].
Looks like it's only needed if ARCH_APICTIMER_STOPS_ON_C3 is defined, so
I've worked around it by creating an empty one.  Maybe not the
appropriate fix.

Lee