Re: [PATCH v2] watchdog: dw_wdt: fix overflow issue in dw_wdt_top_in_seconds

[kbuild test robot]

Hi Huibin,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.13-rc5 next-20170816]
[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/Huibin-Hong/watchdog-dw_wdt-fix-overflow-issue-in-dw_wdt_top_in_seconds/20170817-033555
config: xtensa-allmodconfig (attached as .config)
compiler: xtensa-linux-gcc (GCC) 4.9.0
reproduce:
        wget https://raw.githubusercontent.com/01org/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=xtensa 

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

   drivers//watchdog/dw_wdt.c: In function 'dw_wdt_top_in_seconds':
>> drivers//watchdog/dw_wdt.c:77:38: error: request for member 'clk' in something not a structure or union
     return (cycles / clk_get_rate(dw_wdt.clk));
                                         ^
>> drivers//watchdog/dw_wdt.c:78:1: warning: control reaches end of non-void function [-Wreturn-type]
    }
    ^

vim +/clk +77 drivers//watchdog/dw_wdt.c

    68	
    69	static inline int dw_wdt_top_in_seconds(struct dw_wdt *dw_wdt, unsigned top)
    70	{
    71		/*
    72		 * There are 16 possible timeout values in 0..15 where the number of
    73		 * cycles is 2 ^ (16 + i) and the watchdog counts down.
    74		 */
    75		unsigned int cycles = 1 << (16 + top);
    76	
  > 77		return (cycles / clk_get_rate(dw_wdt.clk));
  > 78	}
    79	

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