1 files changed, 1 insertions, 0 deletions

diff --git a/arch/um/include/mem.h b/arch/um/include/mem.h
index 10c46c38949a..99d3ad4a03e5 100644
--- a/arch/um/include/mem.h
+++ b/arch/um/include/mem.h
@@ -13,6 +13,7 @@ extern int physmem_subst_mapping(void *virt, int fd, __u64 offset, int w);
 extern int is_remapped(void *virt);
 extern int physmem_remove_mapping(void *virt);
 extern void physmem_forget_descriptor(int fd);
+extern unsigned long to_phys(void *virt);
 
 #endif