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Integrating the following mainline destined commits to fix PAT issues with 32bit x86 and qemu: bc22b90fb583 x86/pat: Document the PAT initialization sequence c534b1ec1991 x86/xen, pat: Remove PAT table init code from Xen cd47692e804f x86/mtrr: Fix PAT init handling when MTRR is disabled 039434bdc165 x86/mtrr: Fix Xorg crashes in Qemu sessions c08196e8064c x86/mm/pat: Replace cpu_has_pat with boot_cpu_has() 6928fce8c766 x86/mm/pat: Add pat_disable() interface 3163c8d5468d x86/mm/pat: Add support of non-default PAT MSR setting With this change applied, we once again have working graphics and no special work arounds. (From OE-Core rev: 11cf8cb05975dda23370b7715872bc4a191a2ff6) Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>