Re: [PATCH] fs: Rename mapping private members

["Darrick J. Wong" <djwong@kernel.org>]

On Fri, Nov 17, 2023 at 10:13:32PM +0000, Matthew Wilcox wrote:
> On Fri, Nov 17, 2023 at 02:04:37PM -0800, Darrick J. Wong wrote:
> > On Fri, Nov 17, 2023 at 09:58:23PM +0000, Matthew Wilcox (Oracle) wrote:
> > > It is hard to find where mapping->private_lock, mapping->private_list and
> > > mapping->private_data are used, due to private_XXX being a relatively
> > > common name for variables and structure members in the kernel.  To fit
> > > with other members of struct address_space, rename them all to have an
> > > i_ prefix.  Tested with an allmodconfig build.
> > 
> > /me wonders if the prefix ought to be "as_" for address space instead of
> > inode.  Even though inode begat address_space, they're not the same
> > anymore.
> 
> It'd be the first thing in fs.h to ase an as_ prefix.  Right now, we
> have i_pages, i_mmap_writable, i_mmap, i_mmap_rwsem.  We have a_ops
> (which differs from f_op, i_op, s_op, dq_op, s_qcop in being plural!).
> Everything else doesn't have anything close to a meaningful prefix --
> host, invalidate_lock, gfp_mask, nr_thps, nrpages, writeback_index,
> flags, wb_err.
> 
> So i_ was the most common prefix, but if we wanted to go with a different
> prefix, we could go with a_.  Maybe we'll rename a_ops to a_op at
> some point.

<shrug> address_space::i_private_{data,lock,list} is fine with me.

Acked-by: Darrick J. Wong <djwong@kernel.org>

--D