make alloc_anon_inode more useful

[Christoph Hellwig]

On Tue, Mar 09, 2021 at 12:54:52PM -0400, Jason Gunthorpe wrote:
> 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..

anon_inode.c stuff seems to mostly go through Al's tree, but also various
others.  So best would be if Al has a branch, but I could also set one up.