[PATCH 10/11] VFS: use d_alloc_parallel() in lookup_one_qstr_excl().

[Al Viro]

On Tue, Aug 12, 2025 at 12:25:13PM +1000, NeilBrown wrote:

> + * If it is d_in_lookup() then these conditions can only be checked by the
> + * file system when carrying out the intent (create or rename).

I do not understand.  In which cases would that happen and what would happen
prior to that patch in the same cases?