From: Yinghai Lu <yinghai@kernel.org>
Date: Thu, 24 Jan 2013 20:20:05 +0000 (-0800)
Subject: x86, kexec, 64bit: Only set ident mapping for ram.
X-Git-Tag: v3.9-rc1~105^2~23
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0e691cf824f76adefb4498fe39c300aba2c2575a;p=pandora-kernel.git

x86, kexec, 64bit: Only set ident mapping for ram.

We should set mappings only for usable memory ranges under max_pfn
Otherwise causes same problem that is fixed by

	x86, mm: Only direct map addresses that are marked as E820_RAM

This patch exposes pfn_mapped array, and only sets ident mapping for ranges
in that array.

This patch relies on new kernel_ident_mapping_init that could handle existing
pgd/pud between different calls.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1359058816-7615-25-git-send-email-yinghai@kernel.org
Cc: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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