linux-kernel - Re: [PATCH v5 2/2] console: Add persistent scrollback buffers for all VGA consoles

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Date:   Mon, 21 Nov 2016 06:23:51 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Manuel Schölling <manuel.schoelling@....de>
Cc:     kbuild-all@...org, plagnioj@...osoft.com, tomi.valkeinen@...com,
        manuel.schoelling@....de, jslaby@...e.cz,
        gregkh@...uxfoundation.org, linux-fbdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, andrey_utkin@...tmail.com
Subject: Re: [PATCH v5 2/2] console: Add persistent scrollback buffers for
 all VGA consoles

Hi Manuel,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.9-rc6 next-20161117]
[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/Manuel-Sch-lling/console-Move-scrollback-data-into-its-own-struct/20161121-060257
config: x86_64-randconfig-x018-201647 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   drivers/video/console/vgacon.c: In function 'vgacon_scrollback_switch':
>> drivers/video/console/vgacon.c:232:11: error: 'CONFIG_VGACON_SOFT_SCROLLBACK_PERSISTENT' undeclared (first use in this function)
     vc_num = CONFIG_VGACON_SOFT_SCROLLBACK_PERSISTENT ? vc_num : 0;
              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/video/console/vgacon.c:232:11: note: each undeclared identifier is reported only once for each function it appears in

vim +/CONFIG_VGACON_SOFT_SCROLLBACK_PERSISTENT +232 drivers/video/console/vgacon.c

   226	
   227		vgacon_scrollback_reset(size);
   228	}
   229	
   230	static void vgacon_scrollback_switch(int vc_num)
   231	{
 > 232		vc_num = CONFIG_VGACON_SOFT_SCROLLBACK_PERSISTENT ? vc_num : 0;
   233	
   234		if (!vgacon_scrollbacks[vc_num].data)
   235			vgacon_scrollback_init(vc_num);

---
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