Re: [PATCH v2 1/3] mm: introduce new .mmap_prepare() file callback

[Christian Brauner <brauner@kernel.org>]

On Mon, May 12, 2025 at 12:31:34PM +0100, Lorenzo Stoakes wrote:
> On Mon, May 12, 2025 at 11:24:06AM +0200, Christian Brauner wrote:
> > On Fri, May 09, 2025 at 01:13:34PM +0100, Lorenzo Stoakes wrote:
> 
> [snip]
> 
> > > diff --git a/include/linux/fs.h b/include/linux/fs.h
> > > index 016b0fe1536e..e2721a1ff13d 100644
> > > --- a/include/linux/fs.h
> > > +++ b/include/linux/fs.h
> 
> [snip]
> 
> > >  static inline int call_mmap(struct file *file, struct vm_area_struct *vma)
> > >  {
> > > +	if (WARN_ON_ONCE(file->f_op->mmap_prepare))
> > > +		return -EINVAL;
> > > +
> > >  	return file->f_op->mmap(file, vma);
> > >  }
> > >
> > > +static inline int __call_mmap_prepare(struct file *file,
> > > +		struct vm_area_desc *desc)
> > > +{
> > > +	return file->f_op->mmap_prepare(desc);
> > > +}
> >
> > nit: I would prefer if we could rename this to vfs_mmap() and
> > vfs_mmap_prepare() as this is in line with all the other vfs related
> > helpers we expose.
> >
> 
> Happy to do it, but:
> 
> call_mmap() is already invoked in a bunch of places, so kinda falls outside this
> series (+ would touch a bunch of unrelated files), would you mind if I sent that
> separately?

Sure, that's fine.