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diff --git a/sys/compat/linuxkpi/common/include/asm/memtype.h b/sys/compat/linuxkpi/common/include/asm/memtype.h
new file mode 100644
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/asm/memtype.h
@@ -0,0 +1,18 @@
+/* Public domain. */
+
+#ifndef _LINUXKPI_ASM_MEMTYPE_H_
+#define _LINUXKPI_ASM_MEMTYPE_H_
+
+#if defined(__amd64__) || defined(__i386__)
+
+#include <asm/cpufeature.h>
+
+static inline bool
+pat_enabled(void)
+{
+ return (boot_cpu_has(X86_FEATURE_PAT));
+}
+
+#endif
+
+#endif /* _LINUXKPI_ASM_MEMTYPE_H_ */
diff --git a/sys/compat/linuxkpi/common/include/linux/pci.h b/sys/compat/linuxkpi/common/include/linux/pci.h
--- a/sys/compat/linuxkpi/common/include/linux/pci.h
+++ b/sys/compat/linuxkpi/common/include/linux/pci.h
@@ -57,6 +57,7 @@
#include <linux/compiler.h>
#include <linux/errno.h>
#include <asm/atomic.h>
+#include <asm/memtype.h>
#include <linux/device.h>
#include <linux/pci_ids.h>
#include <linux/pm.h>

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