Re: [PATCH v3 4/6] blktrace: fix debugfs use after free

[Luis Chamberlain]

On Wed, Apr 29, 2020 at 05:04:06AM -0700, Christoph Hellwig wrote:
> On Wed, Apr 29, 2020 at 12:02:30PM +0000, Luis Chamberlain wrote:
> > > Err, that function is static and has two callers.
> > 
> > Yes but that is to make it easier to look for who is creating the
> > debugfs_dir for either the request_queue or partition. I'll export
> > blk_debugfs_root and we'll open code all this.
> 
> No, please not.  exported variables are usually a bad idea.  Just
> skip the somewhat pointless trivial static function.

Alrighty. It has me thinking we might want to only export those symbols
to a specific namespace. Thoughts, preferences?

BLOCK_GENHD_PRIVATE ?

The scsi-generic driver seems... rather unique, and I'd imagine we'd
want to discourage such concoctions in the future, so proliferations
of these symbols.

  Luis