From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Date: Fri, 12 Sep 2014 20:17:23 +0000 (+0200)
Subject: mm: export symbol dependencies of is_zero_pfn()
X-Git-Tag: fixes-for-v3.18-merge-window~90^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0b70068e47e8f0c813a902dc3d6def601fd15acb;p=pandora-kernel.git

mm: export symbol dependencies of is_zero_pfn()

In order to make the static inline function is_zero_pfn() callable by
modules, export its symbol dependencies 'zero_pfn' and (for s390 and
mips) 'zero_page_mask'.

We need this for KVM, as CONFIG_KVM is a tristate for all supported
architectures except ARM and arm64, and testing a pfn whether it refers
to the zero page is required to correctly distinguish the zero page
from other special RAM ranges that may also have the PG_reserved bit
set, but need to be treated as MMIO memory.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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