Index: sys/compat/linuxkpi/common/include/linux/fs.h
===================================================================
--- sys/compat/linuxkpi/common/include/linux/fs.h
+++ sys/compat/linuxkpi/common/include/linux/fs.h
@@ -254,6 +254,13 @@
 	return (f);
 }
 
+static inline bool
+get_file_rcu(struct linux_file *f)
+{
+	return (refcount_acquire_if_not_zero(
+	    f->_file == NULL ? &f->f_count : &f->_file->f_count));
+}
+
 static inline struct inode *
 igrab(struct inode *inode)
 {
Index: sys/compat/linuxkpi/common/src/linux_compat.c
===================================================================
--- sys/compat/linuxkpi/common/src/linux_compat.c
+++ sys/compat/linuxkpi/common/src/linux_compat.c
@@ -90,6 +90,7 @@
 #include <linux/poll.h>
 #include <linux/smp.h>
 #include <linux/wait_bit.h>
+#include <linux/rcupdate.h>
 
 #if defined(__i386__) || defined(__amd64__)
 #include <asm/smp.h>
@@ -1538,6 +1539,7 @@
 	ldev = filp->f_cdev;
 	if (ldev != NULL)
 		linux_cdev_deref(ldev);
+	linux_rcu_barrier(RCU_TYPE_REGULAR);
 	kfree(filp);
 
 	return (error);