diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h
index f225e2fbdfb4..35b60035b6b0 100644
--- a/arch/riscv/include/asm/pgtable.h
+++ b/arch/riscv/include/asm/pgtable.h
@@ -477,6 +477,8 @@ static inline int ptep_clear_flush_young(struct vm_area_struct *vma,
 
 #define TASK_SIZE 0xffffffffUL
 
+static inline void __kernel_map_pages(struct page *page, int numpages, int enable) {}
+
 #endif /* !CONFIG_MMU */
 
 #define kern_addr_valid(addr)   (1) /* FIXME */