linux-kernel - Re: [PATCH v4 33/36] net: faraday add nds32 support.

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Date:   Wed, 20 Dec 2017 18:34:29 +0800
From:   Greentime Hu <green.hu@...il.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     kbuild test robot <lkp@...el.com>, kbuild-all@...org,
        Greentime <greentime@...estech.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Linux-Arch <linux-arch@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <marc.zyngier@....com>,
        Rob Herring <robh+dt@...nel.org>,
        netdev <netdev@...r.kernel.org>,
        Vincent Chen <deanbo422@...il.com>,
        DTML <devicetree@...r.kernel.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        David Howells <dhowells@...hat.com>,
        Will Deacon <will.deacon@....com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        linux-serial@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>,
        Mark Rutland <mark.rutland@....com>, Greg KH <greg@...ah.com>,
        Guo Ren <ren_guo@...ky.com>,
        Philippe Ombredanne <pombredanne@...b.com>
Subject: Re: [PATCH v4 33/36] net: faraday add nds32 support.

2017-12-20 17:58 GMT+08:00 Geert Uytterhoeven <geert@...ux-m68k.org>:
> On Wed, Dec 20, 2017 at 10:54 AM, kbuild test robot <lkp@...el.com> wrote:
>> I love your patch! Perhaps something to improve:
>>
>> [auto build test WARNING on tip/timers/core]
>> [cannot apply to linus/master v4.15-rc4 next-20171220]
>> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
>>
>> url:    https://github.com/0day-ci/linux/commits/Greentime-Hu/Andes-nds32-Linux-Kernel/20171220-155937
>> config: sparc64-allyesconfig (attached as .config)
>> compiler: sparc64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
>> reproduce:
>>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>>         chmod +x ~/bin/make.cross
>>         # save the attached .config to linux build tree
>>         make.cross ARCH=sparc64
>>
>> All warnings (new ones prefixed by >>):
>>
>>    drivers/net/ethernet/faraday/ftmac100.c: In function 'ftmac100_rxdes_set_page':
>>>> drivers/net/ethernet/faraday/ftmac100.c:288:18: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
>>      rxdes->rxdes3 = (unsigned int)page;
>>                      ^
>
> The proper way to casts pointer to integers is to cast to "uintptr_t".
>
> However, the address is stored in a 32-bit descriptor, which means it can
> not work on 64-bit platforms.
>
> Please make the driver depend on "!64BIT || BROKEN"
>
> Cfr. commit 15bfe05c8d6386f1 ("net: ethernet: xilinx: Mark XILINX_LL_TEMAC
> broken on 64-bit")
>
Thanks Geert.

I will apply it like this.

+++ b/drivers/net/ethernet/faraday/Kconfig
@@ -5,7 +5,7 @@
 config NET_VENDOR_FARADAY
        bool "Faraday devices"
        default y
-       depends on ARM
+       depends on ARM || NDS32 || COMPILE_TEST
        ---help---
          If you have a network (Ethernet) card belonging to this class, say Y.

@@ -18,7 +18,8 @@ if NET_VENDOR_FARADAY

 config FTMAC100
        tristate "Faraday FTMAC100 10/100 Ethernet support"
-       depends on ARM
+       depends on ARM || NDS32 || COMPILE_TEST
+       depends on !64BIT || BROKEN
        select MII
        ---help---
          This driver supports the FTMAC100 10/100 Ethernet controller
@@ -27,7 +28,8 @@ config FTMAC100

 config FTGMAC100
        tristate "Faraday FTGMAC100 Gigabit Ethernet support"
-       depends on ARM
+       depends on ARM || NDS32 || COMPILE_TEST
+       depends on !64BIT || BROKEN
        select PHYLIB
        ---help---
          This driver supports the FTGMAC100 Gigabit Ethernet controller