linux-kernel - Re: [PATCH 2/5] soc: fsl: add flextimer module alarm driver for Layerscape

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Message-ID: <201704220014.Wr9eLzeQ%fengguang.wu@intel.com>
Date:   Sat, 22 Apr 2017 01:01:00 +0800
From:   kbuild test robot <lkp@...el.com>
To:     ying.zhang22455@....com
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        jiafei.pan@....com, Wang Dongsheng <dongsheng.wang@....com>,
        Zhang Ying-22455 <ying.zhang22455@....com>
Subject: Re: [PATCH 2/5] soc: fsl: add flextimer module alarm driver for
 Layerscape

Hi Wang,

[auto build test WARNING on linus/master]
[also build test WARNING on v4.11-rc7 next-20170421]
[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/ying-zhang22455-nxp-com/soc-fsl-add-support-for-arm64-Layerscape-SOC-specific-drivers/20170421-174921
config: arm64-allmodconfig (attached as .config)
compiler: aarch64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
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=arm64 

All warnings (new ones prefixed by >>):

   drivers/soc/fsl/layerscape/ftm_alarm.c: In function 'ftm_clean_alarm':
>> drivers/soc/fsl/layerscape/ftm_alarm.c:139:13: warning: large integer implicitly truncated to unsigned type [-Woverflow]
     ftm_writel(~0UL, ftm1_base + FTM_MOD);
                ^

vim +139 drivers/soc/fsl/layerscape/ftm_alarm.c

   123			cycle = 0;
   124		}
   125	
   126		return cycle;
   127	}
   128	
   129	static u32 cycle_to_time(u32 cycle)
   130	{
   131		return cycle / alarm_freq + 1;
   132	}
   133	
   134	static void ftm_clean_alarm(void)
   135	{
   136		ftm_counter_disable(ftm1_base);
   137	
   138		ftm_writel(0x00, ftm1_base + FTM_CNTIN);
 > 139		ftm_writel(~0UL, ftm1_base + FTM_MOD);
   140	
   141		ftm_reset_counter(ftm1_base);
   142	}
   143	
   144	static int ftm_set_alarm(u64 cycle)
   145	{
   146		ftm_irq_disable(ftm1_base);
   147	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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