From: venkatesh.pallipadi@intel.com <venkatesh.pallipadi@intel.com>
Date: Wed, 19 Mar 2008 00:00:20 +0000 (-0700)
Subject: x86: PAT phys_mem_access_prot_allowed for dev/mem mmap
X-Git-Tag: v2.6.26-rc1~1058^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f0970c13b6a5b01189aeb196ebb573cf87d95839;p=pandora-kernel.git

x86: PAT phys_mem_access_prot_allowed for dev/mem mmap

Introduce phys_mem_access_prot_allowed(), which checks whether the mapping
is possible, without any conflicts and returns success or failure based on that.
phys_mem_access_prot() by itself does not allow failure case. This ability
to return error is needed for PAT where we may have aliasing conflicts.

x86 setup __HAVE_PHYS_MEM_ACCESS_PROT and move x86 specific code out of
/dev/mem into arch specific area.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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