[PATCH v10 03/10] fs: Export alloc_empty_backing_file

[Amir Goldstein]

On Tue, Dec 23, 2025 at 10:31 AM Gao Xiang <hsiangkao at linux.alibaba.com> wrote:
>
>
>
> On 2025/12/23 09:56, Hongbo Li wrote:
> > There is no need to open nonexistent real files if backing files
> > couldn't be backed by real files (e.g., EROFS page cache sharing
> > doesn't need typical real files to open again).
> >
> > Therefore, we export the alloc_empty_backing_file() helper, allowing
> > filesystems to dynamically set the backing file without real file
> > open. This is particularly useful for obtaining the correct @path
> > and @inode when calling file_user_path() and file_user_inode().
> >
> > Signed-off-by: Hongbo Li <lihongbo22 at huawei.com>
>
> Reviewed-by: Gao Xiang <hsiangkao at linux.alibaba.com>
>
> (I hope Amir could ack this particular patch too..)

As long as Chritian is ok with this, I don't mind.

Acked-by: Amir Goldstein <amir73il at gmail.com>

Thanks,
Amir.