Index: sys/compat/linuxkpi/common/include/linux/io.h
===================================================================
--- sys/compat/linuxkpi/common/include/linux/io.h
+++ sys/compat/linuxkpi/common/include/linux/io.h
@@ -424,6 +424,8 @@
 #else
 #define	ioremap_wc(addr, size)	ioremap_nocache(addr, size)
 #endif
+#define	ioremap_cache(addr, size)					\
+    _ioremap_attr((addr), (size), VM_MEMATTR_WRITE_BACK)
 #define	ioremap_wb(addr, size)						\
     _ioremap_attr((addr), (size), VM_MEMATTR_WRITE_BACK)
 void iounmap(void *addr);