hacking in old definition for f_dentry from <linux/fs.h>

jbb_gpl/hook.c

@@ -499,6 +499,7 @@ static void unhook_fs(unhook_mode_e cl) {
     up_write(&hook_sem);
 }
 
+#define f_dentry f_path.dentry /* formerly in <linux/fs.h> */
 
 static struct file_operations *get_fops(struct file *filp, char *from) {
     struct file_operations *fops=0;