linux-kernel - Re: [PATCH 10/12] misc: Flexcard basic timestamp counter support

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Date:   Wed, 14 Dec 2016 11:28:48 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Holger Dengler <dengler@...utronix.de>
Cc:     kbuild-all@...org, Lee Jones <lee.jones@...aro.org>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Vinod Koul <vinod.koul@...el.com>,
        linux-kernel@...r.kernel.org, dmaengine@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Sebastian Siewior <bigeasy@...utronix.de>,
        Juergen Bubeck <bubeck@...ug.com>,
        Peter Mahler <mahler@...ug.com>,
        Holger Dengler <dengler@...utronix.de>,
        Benedikt Spranger <b.spranger@...utronix.de>
Subject: Re: [PATCH 10/12] misc: Flexcard basic timestamp counter support

Hi Holger,

[auto build test ERROR on char-misc/char-misc-testing]
[also build test ERROR on v4.9]
[cannot apply to ljones-mfd/for-mfd-next next-20161213]
[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/Holger-Dengler/Eberspaecher-Flexcard-PMC-II-base-support/20161214-082350
config: arm-allmodconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=arm 

All error/warnings (new ones prefixed by >>):

   drivers/misc/flexcard_posixclock.c: In function 'flexcard_clk_gettime':
>> drivers/misc/flexcard_posixclock.c:55:10: error: implicit declaration of function 'readl' [-Werror=implicit-function-declaration]
     upper = readl(clk->ts64);
             ^~~~~
   drivers/misc/flexcard_posixclock.c: In function 'flexcard_clk_settime':
>> drivers/misc/flexcard_posixclock.c:75:2: error: implicit declaration of function 'writel' [-Werror=implicit-function-declaration]
     writel(FLEXCARD_RST_TS, clk->reset);
     ^~~~~~
   drivers/misc/flexcard_posixclock.c: In function 'flexcard_clk_iomap':
>> drivers/misc/flexcard_posixclock.c:96:14: error: implicit declaration of function 'devm_ioremap' [-Werror=implicit-function-declaration]
     clk->ts64 = devm_ioremap(&pdev->dev, res->start, resource_size(res));
                 ^~~~~~~~~~~~
>> drivers/misc/flexcard_posixclock.c:96:12: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
     clk->ts64 = devm_ioremap(&pdev->dev, res->start, resource_size(res));
               ^
   drivers/misc/flexcard_posixclock.c:104:13: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
     clk->reset = devm_ioremap(&pdev->dev, res->start, resource_size(res));
                ^
   cc1: some warnings being treated as errors

vim +/readl +55 drivers/misc/flexcard_posixclock.c

    49	{
    50		struct flexcard_clk *clk = container_of(pc, struct flexcard_clk, clock);
    51		u64 now;
    52		u32 upper, rem;
    53	
    54	retry:
  > 55		upper = readl(clk->ts64);
    56		now = ((u64) upper << 32) | readl(clk->ts64 + 4);
    57		if (upper != readl(clk->ts64))
    58			goto retry;
    59	
    60		tp->tv_sec = div_u64_rem(now, 1000000, &rem);
    61		tp->tv_nsec = rem * 1000;
    62	
    63		return 0;
    64	}
    65	
    66	static int flexcard_clk_settime(struct posix_clock *pc,
    67					  const struct timespec *tp)
    68	{
    69		struct flexcard_clk *clk = container_of(pc, struct flexcard_clk, clock);
    70	
    71		/* The FlexCard posix clock could only be reset to 0 and not set */
    72		if (tp->tv_sec || tp->tv_nsec)
    73			return -EINVAL;
    74	
  > 75		writel(FLEXCARD_RST_TS, clk->reset);
    76	
    77		return 0;
    78	}
    79	
    80	static struct posix_clock_operations flexcard_clk_ops = {
    81		.owner		= THIS_MODULE,
    82		.clock_getres	= flexcard_clk_getres,
    83		.clock_gettime	= flexcard_clk_gettime,
    84		.clock_settime	= flexcard_clk_settime,
    85	};
    86	
    87	static int flexcard_clk_iomap(struct platform_device *pdev)
    88	{
    89		struct flexcard_clk *clk = platform_get_drvdata(pdev);
    90		struct resource *res;
    91	
    92		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
    93		if (!res)
    94			return -ENXIO;
    95	
  > 96		clk->ts64 = devm_ioremap(&pdev->dev, res->start, resource_size(res));
    97		if (!clk->ts64)
    98			return -ENOMEM;
    99	

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