linux-kernel - Re: [PATCH v2] earlycon: Fix __earlycon

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Date:   Sat, 17 Mar 2018 19:52:38 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Daniel Kurtz <djkurtz@...omium.org>
Cc:     kbuild-all@...org, Peter Hurley <peter@...leysoftware.com>,
        Rob Herring <robh@...nel.org>, adurbin@...omium.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org,
        Grant Likely <grant.likely@...aro.org>,
        Daniel Kurtz <djkurtz@...omium.org>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Jiri Slaby <jslaby@...e.com>, Arnd Bergmann <arnd@...db.de>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE" 
        <devicetree@...r.kernel.org>,
        "open list:SERIAL DRIVERS" <linux-serial@...r.kernel.org>,
        "open list:GENERIC INCLUDE/ASM HEADER FILES" 
        <linux-arch@...r.kernel.org>
Subject: Re: [PATCH v2] earlycon: Fix __earlycon_table stride... again

Hi Daniel,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on v4.16-rc4]
[also build test ERROR on next-20180316]
[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/Daniel-Kurtz/earlycon-Fix-__earlycon_table-stride-again/20180317-180525
config: alpha-allyesconfig (attached as .config)
compiler: alpha-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=alpha 

All errors (new ones prefixed by >>):

>> drivers/tty/serial/sh-sci.c:3278:29: error: port_cfg causes a section type conflict with __UNIQUE_ID___earlycon_hscif32
    static struct plat_sci_port port_cfg __initdata;
                                ^~~~~~~~
   In file included from include/linux/serial_sci.h:6:0,
                    from drivers/tty/serial/sh-sci.c:45:
   include/linux/compiler-gcc.h:193:45: note: '__UNIQUE_ID___earlycon_hscif32' was declared here
    #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
                                                ^
   include/linux/serial_core.h:366:34: note: in definition of macro '_OF_EARLYCON_DECLARE'
     static const struct earlycon_id unique_id   \
                                     ^~~~~~~~~
   include/linux/compiler_types.h:53:22: note: in expansion of macro '___PASTE'
    #define __PASTE(a,b) ___PASTE(a,b)
                         ^~~~~~~~
   include/linux/compiler-gcc.h:193:29: note: in expansion of macro '__PASTE'
    #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
                                ^~~~~~~
   include/linux/compiler_types.h:53:22: note: in expansion of macro '___PASTE'
    #define __PASTE(a,b) ___PASTE(a,b)
                         ^~~~~~~~
   include/linux/compiler-gcc.h:193:37: note: in expansion of macro '__PASTE'
    #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
                                        ^~~~~~~
   include/linux/serial_core.h:377:9: note: in expansion of macro '__UNIQUE_ID'
            __UNIQUE_ID(__earlycon_##_name))
            ^~~~~~~~~~~
   drivers/tty/serial/sh-sci.c:3330:1: note: in expansion of macro 'OF_EARLYCON_DECLARE'
    OF_EARLYCON_DECLARE(hscif, "renesas,hscif", hscif_early_console_setup);
    ^~~~~~~~~~~~~~~~~~~

vim +3278 drivers/tty/serial/sh-sci.c

^1da177e drivers/serial/sh-sci.c     Linus Torvalds    2005-04-16  3272  
7b6fd3bf drivers/serial/sh-sci.c     Magnus Damm       2009-12-14  3273  #ifdef CONFIG_SERIAL_SH_SCI_CONSOLE
7b6fd3bf drivers/serial/sh-sci.c     Magnus Damm       2009-12-14  3274  early_platform_init_buffer("earlyprintk", &sci_driver,
7b6fd3bf drivers/serial/sh-sci.c     Magnus Damm       2009-12-14  3275  			   early_serial_buf, ARRAY_SIZE(early_serial_buf));
7b6fd3bf drivers/serial/sh-sci.c     Magnus Damm       2009-12-14  3276  #endif
0b0cced1 drivers/tty/serial/sh-sci.c Yoshinori Sato    2015-12-24  3277  #ifdef CONFIG_SERIAL_SH_SCI_EARLYCON
dd076cff drivers/tty/serial/sh-sci.c Matthias Kaehlcke 2017-10-09 @3278  static struct plat_sci_port port_cfg __initdata;
0b0cced1 drivers/tty/serial/sh-sci.c Yoshinori Sato    2015-12-24  3279  

:::::: The code at line 3278 was first introduced by commit
:::::: dd076cffb8cd675a8973fc9b6cea0c04be6f0111 serial: sh-sci: Fix init data attribute for struct 'port_cfg'

:::::: TO: Matthias Kaehlcke <mka@...omium.org>
:::::: CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

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