D29351.id86081.diff
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	Index: sys/dev/xen/console/xen_console.c
	===================================================================
	--- sys/dev/xen/console/xen_console.c
	+++ sys/dev/xen/console/xen_console.c
	@@ -273,7 +273,7 @@
	xencons_early_init_ring(struct xencons_priv *cons)
	{
	cons->intf = pmap_mapdev_attr(ptoa(xen_get_console_mfn()), PAGE_SIZE,
	- VM_MEMATTR_WRITE_BACK);
	+ VM_MEMATTR_XEN_SHARED);
	cons->evtchn = xen_get_console_evtchn();
	}

	Index: sys/dev/xen/xenstore/xenstore.c
	===================================================================
	--- sys/dev/xen/xenstore/xenstore.c
	+++ sys/dev/xen/xenstore/xenstore.c
	@@ -1130,7 +1130,7 @@
	} else {
	xs.gpfn = xen_get_xenstore_mfn();
	xen_store = pmap_mapdev_attr(ptoa(xs.gpfn), PAGE_SIZE,
	- PAT_WRITE_BACK);
	+ VM_MEMATTR_XEN_SHARED);
	xs.initialized = true;
	}

	Index: sys/x86/include/xen/xen-os.h
	===================================================================
	--- sys/x86/include/xen/xen-os.h
	+++ sys/x86/include/xen/xen-os.h
	@@ -30,6 +30,9 @@
	#ifndef _MACHINE_X86_XEN_XEN_OS_H_
	#define _MACHINE_X86_XEN_XEN_OS_H_

	+/* x86 is lucky and can simply use the default */
	+#define VM_MEMATTR_XEN_SHARED VM_MEMATTR_DEFAULT
	+
	/* Everything below this point is not included by assembler (.S) files. */
	#ifndef __ASSEMBLY__