linux-kernel - Re: [PATCH] of/fdt: Fix #ifdef dependency of early flattree declarations

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Date:   Thu, 4 Jan 2018 07:16:51 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     kbuild-all@...org, Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Pantelis Antoniou <pantelis.antoniou@...sulko.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>
Subject: Re: [PATCH] of/fdt: Fix #ifdef dependency of early flattree
 declarations

Hi Geert,

I love your patch! Yet something to improve:

[auto build test ERROR on robh/for-next]
[also build test ERROR on v4.15-rc6 next-20180103]
[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/Geert-Uytterhoeven/of-fdt-Fix-ifdef-dependency-of-early-flattree-declarations/20180104-062259
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: i386-randconfig-i0-201800 (attached as .config)
compiler: gcc-7 (Debian 7.2.0-12) 7.2.1 20171025
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   drivers/tty/serial/earlycon.c: In function 'param_setup_earlycon':
>> drivers/tty/serial/earlycon.c:221:11: error: implicit declaration of function 'early_init_dt_scan_chosen_stdout' [-Werror=implicit-function-declaration]
       return early_init_dt_scan_chosen_stdout();
              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/early_init_dt_scan_chosen_stdout +221 drivers/tty/serial/earlycon.c

ad1696f6f Aleksey Makarov 2016-09-27  206  
470ca0de6 Peter Hurley    2015-03-09  207  /* early_param wrapper for setup_earlycon() */
470ca0de6 Peter Hurley    2015-03-09  208  static int __init param_setup_earlycon(char *buf)
470ca0de6 Peter Hurley    2015-03-09  209  {
470ca0de6 Peter Hurley    2015-03-09  210  	int err;
470ca0de6 Peter Hurley    2015-03-09  211  
470ca0de6 Peter Hurley    2015-03-09  212  	/*
470ca0de6 Peter Hurley    2015-03-09  213  	 * Just 'earlycon' is a valid param for devicetree earlycons;
470ca0de6 Peter Hurley    2015-03-09  214  	 * don't generate a warning from parse_early_params() in that case
470ca0de6 Peter Hurley    2015-03-09  215  	 */
ad1696f6f Aleksey Makarov 2016-09-27  216  	if (!buf || !buf[0]) {
ad1696f6f Aleksey Makarov 2016-09-27  217  		if (IS_ENABLED(CONFIG_ACPI_SPCR_TABLE)) {
ad1696f6f Aleksey Makarov 2016-09-27  218  			earlycon_init_is_deferred = true;
ad1696f6f Aleksey Makarov 2016-09-27  219  			return 0;
447ef990a Jeffy Chen      2017-08-19  220  		} else if (!buf) {
d503187b6 Leif Lindholm   2016-09-27 @221  			return early_init_dt_scan_chosen_stdout();
ad1696f6f Aleksey Makarov 2016-09-27  222  		}
ad1696f6f Aleksey Makarov 2016-09-27  223  	}
470ca0de6 Peter Hurley    2015-03-09  224  
470ca0de6 Peter Hurley    2015-03-09  225  	err = setup_earlycon(buf);
66c53aaa9 Peter Hurley    2015-05-07  226  	if (err == -ENOENT || err == -EALREADY)
66c53aaa9 Peter Hurley    2015-05-07  227  		return 0;
470ca0de6 Peter Hurley    2015-03-09  228  	return err;
7c53cb3de Peter Hurley    2015-03-09  229  }
470ca0de6 Peter Hurley    2015-03-09  230  early_param("earlycon", param_setup_earlycon);
7c53cb3de Peter Hurley    2015-03-09  231  

:::::: The code at line 221 was first introduced by commit
:::::: d503187b6cc4e41c21c02e695e0e7b5acdd066de of/serial: move earlycon early_param handling to serial

:::::: TO: Leif Lindholm <leif.lindholm@...aro.org>
:::::: CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

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