Minor comment on natural language:

On Wed, Sep 20, 2023 at 9:04 PM Yunsheng Lin [off-list ref] wrote:

As more drivers begin to use the frag API, update the
document about how to decide which API to use for the
driver author.

the fragment API

+/**
+ * page_pool_dev_alloc_frag() - allocate a page frag.

allocate a page fragment.

the precedent is set in
https://www.kernel.org/doc/html/v5.0/vm/page_frags.html
foo_frag is used in C code, and foo fragment in English docs.