[PATCH] filelock: move file locking definitions to separate header file

[Christoph Hellwig]

On Tue, Nov 22, 2022 at 03:51:31AM +0000, Matthew Wilcox wrote:
> These two seem undefined at this point.
> 
> > +	struct fasync_struct *	fl_fasync; /* for lease break notifications */

Given that we just use a pointer to it there is no need to have a
definition.