netdev - Re: [PATCH net-next 2/4] net: dsa: Add wrappers for overloaded ndo

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Date:   Sat, 18 Jul 2020 23:18:58 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     kernel test robot <lkp@...el.com>, netdev@...r.kernel.org,
        kbuild-all@...ts.01.org, Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Jiri Pirko <jiri@...lanox.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Taehee Yoo <ap420073@...il.com>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Maxim Mikityanskiy <maximmi@...lanox.com>
Subject: Re: [PATCH net-next 2/4] net: dsa: Add wrappers for overloaded
 ndo_ops

On Sat, Jul 18, 2020 at 11:53:52AM -0700, Florian Fainelli wrote:
> 
> 
> On 7/17/2020 9:53 PM, kernel test robot wrote:
> > Hi Florian,
> > 
> > I love your patch! Perhaps something to improve:
> > 
> > [auto build test WARNING on net-next/master]
> > 
> > url:    https://github.com/0day-ci/linux/commits/Florian-Fainelli/net-dsa-Setup-dsa_netdev_ops/20200718-110931
> > base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git dcc82bb0727c08f93a91fa7532b950bafa2598f2
> > config: i386-allyesconfig (attached as .config)
> > compiler: gcc-9 (Debian 9.3.0-14) 9.3.0
> > reproduce (this is a W=1 build):
> >         # save the attached .config to linux build tree
> >         make W=1 ARCH=i386 
> > 
> > If you fix the issue, kindly add following tag as appropriate
> > Reported-by: kernel test robot <lkp@...el.com>
> > 
> > All warnings (new ones prefixed by >>):
> > 
> >    In file included from drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c:18:
> >>> include/net/dsa.h:720:1: warning: 'inline' is not at beginning of declaration [-Wold-style-declaration]
> >      720 | dsa_build_ndo_op(ndo_do_ioctl, struct ifreq *, ifr, int, cmd);
> >          | ^~~~~~~~~~~~~~~~
> >    include/net/dsa.h:721:1: warning: 'inline' is not at beginning of declaration [-Wold-style-declaration]
> >      721 | dsa_build_ndo_op(ndo_get_phys_port_name, char *, name, size_t, len);
> >          | ^~~~~~~~~~~~~~~~
> > 
> > vim +/inline +720 include/net/dsa.h
> 
> This is a macro invocation, not function declaration so I am not exactly
> sure why this is a problem here? I could capitalize the macro name if
> that avoids the compiler thinking this is a function declaration or move
> out the static inline away from the macro invocation.
> -- 
> Florian

Maybe it wants 'static inline int' and not 'static int inline'?

+#if IS_ENABLED(CONFIG_NET_DSA)
+#define dsa_build_ndo_op(name, arg1_type, arg1_name, arg2_type, arg2_name) \
+static int inline dsa_##name(struct net_device *dev, arg1_type arg1_name, \
            ^
            ~~~~~ here
+			     arg2_type arg2_name)	\
+{							\

-Vladimir