From: Yinghai Lu <yinghai@kernel.org>
Date: Sat, 17 Nov 2012 03:39:06 +0000 (-0800)
Subject: x86, mm: only call early_ioremap_page_table_range_init() once
X-Git-Tag: v3.9-rc1~105^2~63
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=719272c45b821d38608fc333700bde1a89c56c59;p=pandora-kernel.git

x86, mm: only call early_ioremap_page_table_range_init() once

On 32bit, before patcheset that only set page table for ram, we only
call that one time.

Now, we are calling that during every init_memory_mapping if we have holes
under max_low_pfn.

We should only call it one time after all ranges under max_low_page get
mapped just like we did before.

Also that could avoid the risk to run out of pgt_buf in BRK.

Need to update page_table_range_init() to count the pages for kmap page table
at first, and use new added alloc_low_pages() to get pages in sequence.
That will conform to the requirement that pages need to be in low to high order.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1353123563-3103-30-git-send-email-yinghai@kernel.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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