From: Li, Zhen-Hua <zhen-hual@hp.com>
Date: Mon, 18 Mar 2013 02:45:43 +0000 (+0800)
Subject: Add WB/UC check for early_ioremap
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~144^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a4279e6202bbd08ac6038234571ac639c98879cf;p=pandora-kernel.git

Add WB/UC check for early_ioremap

On ia64 system, the function early_ioremap returned an uncached memory
reference without checking whether this was consistent with existing
mappings. This causes efi error and the kernel failed during boot.  Add a
check to test whether memory has EFI_MEMORY_WB set.  Use the function
kern_mem_attribute() in early_iomap() function to provide appropriate
cacheable or uncacheable mapped address.

See the document Documentation/ia64/aliasing.txt for more details.

Signed-off-by: Li, Zhen-Hua <zhen-hual@hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
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