Index: sys/compat/linuxkpi/common/include/linux/shmem_fs.h
===================================================================
--- sys/compat/linuxkpi/common/include/linux/shmem_fs.h
+++ sys/compat/linuxkpi/common/include/linux/shmem_fs.h
@@ -31,6 +31,8 @@
 #ifndef	_LINUXKPI_LINUX_SHMEM_FS_H_
 #define	_LINUXKPI_LINUX_SHMEM_FS_H_
 
+#include <linux/file.h>
+
 /* Shared memory support */
 unsigned long linux_invalidate_mapping_pages(vm_object_t, pgoff_t, pgoff_t);
 struct page *linux_shmem_read_mapping_page_gfp(vm_object_t, int, gfp_t);