From: Huang, Ying <ying.huang@intel.com>
Date: Wed, 30 Jan 2008 12:34:04 +0000 (+0100)
Subject: x86: ioremap_nocache fix
X-Git-Tag: v2.6.25-rc1~1143^2~72
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1c17f4d615f34a4ecfcf9132d643126b226f5e79;p=pandora-kernel.git

x86: ioremap_nocache fix

This patch fixes a bug of ioremap_nocache. ioremap_nocache() will call
__ioremap() with flags != 0 to do the real work, which will call
change_page_attr_addr() if phys_addr + size - 1 < (end_pfn_map << PAGE_SHIFT).
But some pages between 0 ~ end_pfn_map << PAGE_SHIFT are not mapped by
identity map, this will make change_page_attr_addr failed.

This patch is based on latest x86 git and has been tested on x86_64 platform.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---

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