Merge tag 'stable/for-linus-3.4-tag' of git://git.kernel.org/pub/scm/linux/kernel...

[firefly-linux-kernel-4.4.55.git] / arch / x86 / xen / mmu.c

diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 1a309ee2331eff879017e3a014dda53dba5f9556..988828b479ed29660363f87adda4c6c62707441b 100644 (file)
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -415,13 +415,13 @@ static pteval_t iomap_pte(pteval_t val)
 static pteval_t xen_pte_val(pte_t pte)
 {
        pteval_t pteval = pte.pte;
-
+#if 0
        /* If this is a WC pte, convert back from Xen WC to Linux WC */
        if ((pteval & (_PAGE_PAT | _PAGE_PCD | _PAGE_PWT)) == _PAGE_PAT) {
                WARN_ON(!pat_enabled);
                pteval = (pteval & ~_PAGE_PAT) | _PAGE_PWT;
        }
-
+#endif
        if (xen_initial_domain() && (pteval & _PAGE_IOMAP))
                return pteval;
 
@@ -463,7 +463,7 @@ void xen_set_pat(u64 pat)
 static pte_t xen_make_pte(pteval_t pte)
 {
        phys_addr_t addr = (pte & PTE_PFN_MASK);
-
+#if 0
        /* If Linux is trying to set a WC pte, then map to the Xen WC.
         * If _PAGE_PAT is set, then it probably means it is really
         * _PAGE_PSE, so avoid fiddling with the PAT mapping and hope
@@ -476,7 +476,7 @@ static pte_t xen_make_pte(pteval_t pte)
                if ((pte & (_PAGE_PCD | _PAGE_PWT)) == _PAGE_PWT)
                        pte = (pte & ~(_PAGE_PCD | _PAGE_PWT)) | _PAGE_PAT;
        }
-
+#endif
        /*
         * Unprivileged domains are allowed to do IOMAPpings for
         * PCI passthrough, but not map ISA space.  The ISA