diff --git a/arch/xtensa/lib/cache.c b/arch/xtensa/lib/cache.c
index e6a7f68..1229b40 100644
--- a/arch/xtensa/lib/cache.c
+++ b/arch/xtensa/lib/cache.c
@@ -6,6 +6,7 @@
 
 #include <cpu_func.h>
 #include <asm/cache.h>
+#include <linux/errno.h>
 
 /*
  * We currently run always with caches enabled when running from memory.
@@ -57,3 +58,8 @@
 {
 	__invalidate_icache_all();
 }
+
+int __weak pgprot_set_attrs(phys_addr_t addr, size_t size, enum pgprot_attrs perm)
+{
+	return -ENOSYS;
+}