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Date:   Mon, 25 Jan 2021 18:27:33 +0000
To:     David Rientjes <rientjes@google.com>
From:   Alexander Lobakin <alobakin@pm.me>
Cc:     Alexander Lobakin <alobakin@pm.me>,
        "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>,
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        Tony Nguyen <anthony.l.nguyen@intel.com>,
        Saeed Mahameed <saeedm@nvidia.com>,
        Leon Romanovsky <leon@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
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        Randy Dunlap <rdunlap@infradead.org>,
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        linux-rdma@vger.kernel.org, linux-mm@kvack.org
Reply-To: Alexander Lobakin <alobakin@pm.me>
Subject: Re: [PATCH net-next 2/3] net: constify page_is_pfmemalloc() argument at call sites
Message-ID: <20210125182702.247232-1-alobakin@pm.me>
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From: David Rientjes <rientjes@google.com>
Date: Mon, 25 Jan 2021 10:19:48 -0800 (PST)

> On Mon, 25 Jan 2021, Alexander Lobakin wrote:
>=20
> > Constify "page" argument for page_is_pfmemalloc() users where applicabl=
e.
> >
> > Signed-off-by: Alexander Lobakin <alobakin@pm.me>
> > ---
> >  drivers/net/ethernet/hisilicon/hns3/hns3_enet.c   | 2 +-
> >  drivers/net/ethernet/intel/fm10k/fm10k_main.c     | 2 +-
> >  drivers/net/ethernet/intel/i40e/i40e_txrx.c       | 2 +-
> >  drivers/net/ethernet/intel/iavf/iavf_txrx.c       | 2 +-
> >  drivers/net/ethernet/intel/ice/ice_txrx.c         | 2 +-
> >  drivers/net/ethernet/intel/igb/igb_main.c         | 2 +-
> >  drivers/net/ethernet/intel/igc/igc_main.c         | 2 +-
> >  drivers/net/ethernet/intel/ixgbe/ixgbe_main.c     | 2 +-
> >  drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 2 +-
> >  drivers/net/ethernet/mellanox/mlx5/core/en_rx.c   | 2 +-
> >  include/linux/skbuff.h                            | 4 ++--
> >  11 files changed, 12 insertions(+), 12 deletions(-)
> >
> > diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/=
net/ethernet/hisilicon/hns3/hns3_enet.c
> > index 512080640cbc..0f8e962b5010 100644
> > --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
> > +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
> > @@ -2800,7 +2800,7 @@ static void hns3_nic_alloc_rx_buffers(struct hns3=
_enet_ring *ring,
> >  =09writel(i, ring->tqp->io_base + HNS3_RING_RX_RING_HEAD_REG);
> >  }
> >
> > -static bool hns3_page_is_reusable(struct page *page)
> > +static bool hns3_page_is_reusable(const struct page *page)
> >  {
> >  =09return page_to_nid(page) =3D=3D numa_mem_id() &&
> >  =09=09!page_is_pfmemalloc(page);
>=20
> Hi Alexander,

Hi David!

> All of these functions appear to be doing the same thing, would it make
> sense to simply add this to a header file and remove all the code
> duplication as well?

That's an interesting idea. I'll be glad to do this if drivers'
maintainers agree it's okay for them.

Thanks,
Al