linux-kernel - RE: [EXT] Re: [PATCH v2 net 2/2] net: fec: restructuring the functions to avoid forward declarations

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Message-ID: <PAXPR04MB918564D93054CEDF255DA251896C9@PAXPR04MB9185.eurprd04.prod.outlook.com>
Date:   Wed, 3 May 2023 18:41:59 +0000
From:   Shenwei Wang <shenwei.wang@....com>
To:     Simon Horman <horms@...nel.org>
CC:     Andrew Lunn <andrew@...n.ch>, Wei Fang <wei.fang@....com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Clark Wang <xiaoning.wang@....com>,
        dl-linux-imx <linux-imx@....com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        Alexander Lobakin <alexandr.lobakin@...el.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "imx@...ts.linux.dev" <imx@...ts.linux.dev>
Subject: RE: [EXT] Re: [PATCH v2 net 2/2] net: fec: restructuring the
 functions to avoid forward declarations



> -----Original Message-----
> From: Simon Horman <horms@...nel.org>
> Sent: Wednesday, May 3, 2023 10:34 AM
> To: Shenwei Wang <shenwei.wang@....com>
> Cc: Andrew Lunn <andrew@...n.ch>; Wei Fang <wei.fang@....com>; David S.
> Miller <davem@...emloft.net>; Eric Dumazet <edumazet@...gle.com>; Jakub
> Kicinski <kuba@...nel.org>; Paolo Abeni <pabeni@...hat.com>; Clark Wang
> <xiaoning.wang@....com>; dl-linux-imx <linux-imx@....com>; Alexei
> Starovoitov <ast@...nel.org>; Daniel Borkmann <daniel@...earbox.net>;
> Jesper Dangaard Brouer <hawk@...nel.org>; John Fastabend
> <john.fastabend@...il.com>; Alexander Lobakin
> <alexandr.lobakin@...el.com>; netdev@...r.kernel.org; linux-
> kernel@...r.kernel.org; imx@...ts.linux.dev
> Subject: Re: [EXT] Re: [PATCH v2 net 2/2] net: fec: restructuring the functions to
> avoid forward declarations
> 
> Caution: This is an external email. Please take care when clicking links or
> opening attachments. When in doubt, report the message using the 'Report this
> email' button
> 
> 
> On Wed, May 03, 2023 at 12:53:57PM +0000, Shenwei Wang wrote:
> >
> >
> > > -----Original Message-----
> > > From: Andrew Lunn <andrew@...n.ch>
> > > Sent: Tuesday, May 2, 2023 6:19 PM
> > > To: Shenwei Wang <shenwei.wang@....com>
> > > Cc: Wei Fang <wei.fang@....com>; David S. Miller
> > > <davem@...emloft.net>; Eric Dumazet <edumazet@...gle.com>; Jakub
> > > Kicinski <kuba@...nel.org>; Paolo Abeni <pabeni@...hat.com>; Clark
> > > Wang <xiaoning.wang@....com>; dl- linux-imx <linux-imx@....com>;
> > > Alexei Starovoitov <ast@...nel.org>; Daniel Borkmann
> > > <daniel@...earbox.net>; Jesper Dangaard Brouer <hawk@...nel.org>;
> > > John Fastabend <john.fastabend@...il.com>; Alexander Lobakin
> > > <alexandr.lobakin@...el.com>; netdev@...r.kernel.org; linux-
> > > kernel@...r.kernel.org; imx@...ts.linux.dev
> > > Subject: [EXT] Re: [PATCH v2 net 2/2] net: fec: restructuring the
> > > functions to avoid forward declarations
> > >
> > > Caution: This is an external email. Please take care when clicking
> > > links or opening attachments. When in doubt, report the message
> > > using the 'Report this email' button
> > >
> > >
> > > On Tue, May 02, 2023 at 05:08:18PM -0500, Shenwei Wang wrote:
> > > > The patch reorganizes functions related to XDP frame transmission,
> > > > moving them above the fec_enet_run_xdp implementation. This
> > > > eliminates the need for forward declarations of these functions.
> > >
> > > I'm confused. Are these two patches in the wrong order?
> > >
> > > The reason that i asked you to fix the forward declaration in
> > > net-next is that it makes your fix two patches. Sometimes that is
> > > not obvious to people back porting patches, and one gets lost,
> > > causing build problems. So it is better to have a single patch which
> > > is maybe not 100% best practice merged to stable, and then a cleanup patch
> merged to the head of development.
> > >
> >
> > If that is the case, we should forgo the second patch. Its purpose was
> > to reorganize function order such that the subsequent patch to
> > net-next enabling XDP_TX would not encounter forward declaration issues.
> 
> I think a good plan would be, as I understood Andrew's original suggestion,
> to:
> 
> 1. Only have patch 2/2, targeted at 'net', for now 2. Later, once that patch has
> been accepted into 'net', 'net-next' has
>    reopened, and that patch is present in 'net-next', then follow-up
>    with patch 1/2, which is a cleanup.

So should I re-submit the patch? Or you just take the 1st patch and drop the 2nd one?

Thanks,
Shenwei