Re: [net-next v2 00/12] add support for Renesas RZ/N1 ethernet subsystem devices

From: "Clément Léger" <clement.leger@bootlin.com>
To: Jakub Kicinski <kuba@kernel.org>
Cc: "Andrew Lunn" <andrew@lunn.ch>,
	"Vivien Didelot" <vivien.didelot@gmail.com>,
	"Florian Fainelli" <f.fainelli@gmail.com>,
	"Vladimir Oltean" <olteanv@gmail.com>,
	"David S . Miller" <davem@davemloft.net>,
	"Eric Dumazet" <edumazet@google.com>,
	"Paolo Abeni" <pabeni@redhat.com>,
	"Rob Herring" <robh+dt@kernel.org>,
	"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
	"Geert Uytterhoeven" <geert+renesas@glider.be>,
	"Magnus Damm" <magnus.damm@gmail.com>,
	"Heiner Kallweit" <hkallweit1@gmail.com>,
	"Russell King" <linux@armlinux.org.uk>,
	"Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
	"Herve Codina" <herve.codina@bootlin.com>,
	"Miquèl Raynal" <miquel.raynal@bootlin.com>,
	"Milan Stevanovic" <milan.stevanovic@se.com>,
	"Jimmy Lalande" <jimmy.lalande@se.com>,
	"Pascal Eberhard" <pascal.eberhard@se.com>,
	linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
	linux-renesas-soc@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [net-next v2 00/12] add support for Renesas RZ/N1 ethernet subsystem devices
Date: Mon, 2 May 2022 08:51:03 +0200	[thread overview]
Message-ID: <20220502085103.19b4f47b@fixe.home> (raw)
In-Reply-To: <20220429123235.3098ed12@kernel.org>

Le Fri, 29 Apr 2022 12:32:35 -0700,
Jakub Kicinski <kuba@kernel.org> a écrit :

> On Fri, 29 Apr 2022 16:34:53 +0200 Clément Léger wrote:
> > The Renesas RZ/N1 SoCs features an ethernet subsystem which contains
> > (most notably) a switch, two GMACs, and a MII converter [1]. This
> > series adds support for the switch and the MII converter.
> > 
> > The MII converter present on this SoC has been represented as a PCS
> > which sit between the MACs and the PHY. This PCS driver is probed from
> > the device-tree since it requires to be configured. Indeed the MII
> > converter also contains the registers that are handling the muxing of
> > ports (Switch, MAC, HSR, RTOS, etc) internally to the SoC.
> > 
> > The switch driver is based on DSA and exposes 4 ports + 1 CPU
> > management port. It include basic bridging support as well as FDB and
> > statistics support.  
> 
> Build's not happy (W=1 C=1):
> 
> drivers/net/dsa/rzn1_a5psw.c:574:29: warning: symbol 'a5psw_switch_ops' was not declared. Should it be static?
> In file included from ../drivers/net/dsa/rzn1_a5psw.c:17:
> drivers/net/dsa/rzn1_a5psw.h:221:1: note: offset of packed bit-field ‘port_mask’ has changed in GCC 4.4
>   221 | } __packed;
>       | ^
> 

Hi Jakub, I only had this one (due to the lack of W=1 C=1 I guess) which
I thought (wrongly) that it was due to my GCC version:

  CC      net/dsa/switch.o
  CC      net/dsa/tag_8021q.o
In file included from ../drivers/net/dsa/rzn1_a5psw.c:17:
../drivers/net/dsa/rzn1_a5psw.h:221:1: note: offset of packed bit-field
  ‘port_mask’ has changed in GCC 4.4 221 | } __packed;
      | ^
  CC      kernel/module.o
  CC      drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.o
  CC      drivers/net/ethernet/stmicro/stmmac/dwmac100_core.o

I'll fix the other errors which are more trivial, however, I did not
found a way to fix the packed bit-field warning.

Thanks

> drivers/net/dsa/rzn1_a5psw.h:200: warning: Function parameter or member 'hclk' not described in 'a5psw'
> drivers/net/dsa/rzn1_a5psw.h:200: warning: Function parameter or member 'clk' not described in 'a5psw'
> 
> Not sure how many of these are added by you but I think 2 at least.

-- 
Clément Léger,
Embedded Linux and Kernel engineer at Bootlin
https://bootlin.com