file struct's dentry being null?

[Shaya Potter <spotter@cs.columbia.edu>]

I decided to do an experiment, in fput, I did a 

struct file * next;
next = (struct file *) file->f_list.next;
if ( !next->dentry )
	printk("file struct: next's dentry is null, %d\n", next);

and I get a bunch of kernel output along these lines, with 5 different
next memory locations.  I only have 3 mount points, so it doesn't seem
to be related to that (though I would have thought it might have been
the list_head on the superblock).  anyways, just trying to figure out
what it's pointing to?

thanks,

shaya