diff --git a/sys/compat/linuxkpi/common/include/linux/mm.h b/sys/compat/linuxkpi/common/include/linux/mm.h
--- a/sys/compat/linuxkpi/common/include/linux/mm.h
+++ b/sys/compat/linuxkpi/common/include/linux/mm.h
@@ -348,6 +348,11 @@
 
 void vma_set_file(struct vm_area_struct *vma, struct linux_file *file);
 
+static inline void
+might_alloc(gfp_t gfp_mask __unused)
+{
+}
+
 #define	is_cow_mapping(flags)	(false)
 
 #endif					/* _LINUXKPI_LINUX_MM_H_ */