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diff --git a/sys/arm64/arm64/pmap.c b/sys/arm64/arm64/pmap.c
--- a/sys/arm64/arm64/pmap.c
+++ b/sys/arm64/arm64/pmap.c
@@ -9643,7 +9643,7 @@
pmap_is_valid_memattr(pmap_t pmap __unused, vm_memattr_t mode)
{
- return (mode >= VM_MEMATTR_DEVICE && mode <= VM_MEMATTR_WRITE_THROUGH);
+ return (mode >= 0 && mode < VM_MEMATTR_END);
}
static void *
diff --git a/sys/arm64/include/vm.h b/sys/arm64/include/vm.h
--- a/sys/arm64/include/vm.h
+++ b/sys/arm64/include/vm.h
@@ -33,6 +33,7 @@
#define VM_MEMATTR_WRITE_BACK 2
#define VM_MEMATTR_WRITE_THROUGH 3
#define VM_MEMATTR_DEVICE_nGnRE 4
+#define VM_MEMATTR_END (VM_MEMATTR_DEVICE_nGnRE + 1)
#define VM_MEMATTR_DEVICE VM_MEMATTR_DEVICE_nGnRE
#define VM_MEMATTR_DEVICE_NP VM_MEMATTR_DEVICE_nGnRnE

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