Re: [PATCH net-next v9 5/8] netmem: introduce a netmem API, virt_to_head_netmem()

[Mina Almasry <almasrymina@google.com>]

On Thu, Jul 10, 2025 at 1:28 AM Byungchul Park <byungchul@sk.com> wrote:
>
> To eliminate the use of struct page in page pool, the page pool code
> should use netmem descriptor and APIs instead.
>
> As part of the work, introduce a netmem API to convert a virtual address
> to a head netmem allowing the code to use it rather than the existing
> API, virt_to_head_page() for struct page.
>
> Signed-off-by: Byungchul Park <byungchul@sk.com>
> Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com>
> Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
> Reviewed-by: Mina Almasry <almasrymina@google.com>
> ---
>  include/net/netmem.h | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/include/net/netmem.h b/include/net/netmem.h
> index 283b4a997fbc..b92c7f15166a 100644
> --- a/include/net/netmem.h
> +++ b/include/net/netmem.h
> @@ -372,6 +372,13 @@ static inline bool page_pool_page_is_pp(struct page *page)
>  }
>  #endif
>
> +static inline netmem_ref virt_to_head_netmem(const void *x)
> +{
> +       netmem_ref netmem = virt_to_netmem(x);
> +
> +       return netmem_compound_head(netmem);
> +}
> +

Squash with the first user of this helper please.


-- 
Thanks,
Mina