1 files changed, 1 insertions, 0 deletions

diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index 7dca30a26c53..358e4d309ceb 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -128,6 +128,7 @@ do {									\
 #endif
 
 #ifndef __HAVE_ARCH_PTEP_SET_WRPROTECT
+struct mm_struct;
 static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long address, pte_t *ptep)
 {
         pte_t old_pte = *ptep;