Re: [Intel-wired-lan] [PATCH iwl-next 1/3] libeth: add __libeth_rx_sync_for_cpu

> -----Original Message-----
> From: Intel-wired-lan <[email protected]> On Behalf
> Of Matt Vollrath
> Sent: Friday, July 31, 2026 2:41 PM
> To: [email protected]
> Cc: [email protected]; Lobakin, Aleksander
> <[email protected]>; Nguyen, Anthony L
> <[email protected]>; Kitszel, Przemyslaw
> <[email protected]>; Andrew Lunn <[email protected]>;
> David S . Miller <[email protected]>; Eric Dumazet
> <[email protected]>; Jakub Kicinski <[email protected]>; Paolo Abeni
> <[email protected]>; Simon Horman <[email protected]>; Matt Vollrath
> <[email protected]>
> Subject: [Intel-wired-lan] [PATCH iwl-next 1/3] libeth: add
> __libeth_rx_sync_for_cpu
>=20
> Deriving a netmem's page pool from the ref requires loading a pointer
> from the netmem_desc, which may not be cached. The driver may already
> have a cached reference to the correct page pool, so add a bypass.
>=20
> No functional change for existing callers.
>=20
> Signed-off-by: Matt Vollrath <[email protected]>
> Assisted-by: Claude:claude-5-fable
> ---
>  include/net/libeth/rx.h | 37 ++++++++++++++++++++++++++-----------
>  1 file changed, 26 insertions(+), 11 deletions(-)
>=20
> diff --git a/include/net/libeth/rx.h b/include/net/libeth/rx.h index
> 5d991404845e..fddac084e001 100644
> --- a/include/net/libeth/rx.h
> +++ b/include/net/libeth/rx.h
> @@ -118,36 +118,51 @@ static inline dma_addr_t libeth_rx_alloc(const
> struct libeth_fq_fp *fq, u32 i)  void
> libeth_rx_recycle_slow(netmem_ref netmem);
>=20
>  /**

...

>  /* Converting abstract packet type numbers into a software structure
> with
>   * the packet parameters to do O(1) lookup on Rx.
>   */
> --
> 2.43.0

Reviewed-by: Aleksandr Loktionov <[email protected]>