diff --git a/sys/compat/linuxkpi/common/include/asm/set_memory.h b/sys/compat/linuxkpi/common/include/asm/set_memory.h
--- a/sys/compat/linuxkpi/common/include/asm/set_memory.h
+++ b/sys/compat/linuxkpi/common/include/asm/set_memory.h
@@ -34,26 +34,20 @@
 static inline int
 set_memory_uc(unsigned long addr, int numpages)
 {
-	vm_offset_t va;
 	vm_size_t len;
 
-	va = PHYS_TO_DMAP(addr);
-	len = numpages << PAGE_SHIFT;
-
-	return (-pmap_change_attr(va, len, VM_MEMATTR_UNCACHEABLE));
+	len = (vm_size_t)numpages << PAGE_SHIFT;
+	return (-pmap_change_attr(addr, len, VM_MEMATTR_UNCACHEABLE));
 }
 
 static inline int
 set_memory_wc(unsigned long addr, int numpages)
 {
 #ifdef VM_MEMATTR_WRITE_COMBINING
-	vm_offset_t va;
 	vm_size_t len;
 
-	va = PHYS_TO_DMAP(addr);
-	len = numpages << PAGE_SHIFT;
-
-	return (-pmap_change_attr(va, len, VM_MEMATTR_WRITE_COMBINING));
+	len = (vm_size_t)numpages << PAGE_SHIFT;
+	return (-pmap_change_attr(addr, len, VM_MEMATTR_WRITE_COMBINING));
 #else
 	return (set_memory_uc(addr, numpages));
 #endif
@@ -62,13 +56,10 @@
 static inline int
 set_memory_wb(unsigned long addr, int numpages)
 {
-	vm_offset_t va;
 	vm_size_t len;
 
-	va = PHYS_TO_DMAP(addr);
-	len = numpages << PAGE_SHIFT;
-
-	return (-pmap_change_attr(va, len, VM_MEMATTR_WRITE_BACK));
+	len = (vm_size_t)numpages << PAGE_SHIFT;
+	return (-pmap_change_attr(addr, len, VM_MEMATTR_WRITE_BACK));
 }
 
 static inline int