netdev - RE: linux-next: build failure after merge of the net-next tree

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Date:   Fri, 7 Sep 2018 15:30:42 +0000
From:   "Keller, Jacob E" <jacob.e.keller@...el.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>,
        David Miller <davem@...emloft.net>,
        Networking <netdev@...r.kernel.org>
CC:     Linux-Next Mailing List <linux-next@...r.kernel.org>,
        "Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
        "Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>,
        "Bowers, AndrewX" <andrewx.bowers@...el.com>
Subject: RE: linux-next: build failure after merge of the net-next tree

> -----Original Message-----
> From: netdev-owner@...r.kernel.org [mailto:netdev-owner@...r.kernel.org]
> On Behalf Of Stephen Rothwell
> Sent: Thursday, September 06, 2018 5:21 PM
> To: David Miller <davem@...emloft.net>; Networking
> <netdev@...r.kernel.org>
> Cc: Linux-Next Mailing List <linux-next@...r.kernel.org>; Linux Kernel Mailing
> List <linux-kernel@...r.kernel.org>; Keller, Jacob E <jacob.e.keller@...el.com>;
> Kirsher, Jeffrey T <jeffrey.t.kirsher@...el.com>; Bowers, AndrewX
> <andrewx.bowers@...el.com>
> Subject: Re: linux-next: build failure after merge of the net-next tree
> 
> Hi all,
> 
> On Mon, 3 Sep 2018 09:47:02 +1000 Stephen Rothwell <sfr@...b.auug.org.au>
> wrote:
> >
> > After merging the net-next tree, today's linux-next build (powerpc
> > ppc64_defconfig) failed like this:
> >
> > In file included from drivers/net/ethernet/intel/i40e/i40e_ethtool.c:9:
> > drivers/net/ethernet/intel/i40e/i40e_ethtool.c: In function
> '__i40e_add_stat_strings':
> > drivers/net/ethernet/intel/i40e/i40e_ethtool_stats.h:193:20: error: function
> '__i40e_add_stat_strings' can never be inlined because it uses variable argument
> lists
> >  static inline void __i40e_add_stat_strings(u8 **p, const struct i40e_stats
> stats[],
> >                     ^~~~~~~~~~~~~~~~~~~~~~~
> >
> > Caused by commit
> >
> >   8fd75c58a09a ("i40e: move ethtool stats boiler plate code to
> i40e_ethtool_stats.h")
> >
> > It is not clear this patch has any value anyway as the moved functions
> > are only used in the file they were moved from.
> >
> > I reverted that commit for today.
> >
> > The same problem would exist in drivers/net/ethernet/intel/i40evf (where
> > a lot of code is duplicated from drivers/net/ethernet/intel/i40e) except
> > that this function is not declared inline there.
> > Luckily, i40e_ethtool_stats.h is only included my one file
> > drivers/net/ethernet/intel/i40evf/i40evf_ethtool.c, otherwise there
> > would be multiple copies of __i40e_add_stat_strings().
> >
> > Surely there is some scope for factoring out some common code between
> > these two drivers?
> 
> Ping?
> 
> --
> Cheers,
> Stephen Rothwell

There's some discussion about this going on in the intel-wired-lan mailing list.

Thanks,
Jake