make alloc_anon_inode more useful

[Jason Gunthorpe]

On Tue, Mar 09, 2021 at 04:53:39PM +0100, Christoph Hellwig wrote:
> Hi all,
> 
> this series first renames the existing alloc_anon_inode to
> alloc_anon_inode_sb to clearly mark it as requiring a superblock.
> 
> It then adds a new alloc_anon_inode that works on the anon_inode
> file system super block, thus removing tons of boilerplate code.
> 
> The few remainig callers of alloc_anon_inode_sb all use alloc_file_pseudo
> later, but might also be ripe for some cleanup.

I like it

For a submission plan can we have this on a git branch please? I will
need a copy for RDMA and Alex will need one for vfio..

Thanks,
Jason