linux-kernel - Re: [PATCH v3 1/3] watchdog: sama5d4

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Date:   Wed, 13 Nov 2019 05:24:05 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Eugen.Hristev@...rochip.com
Cc:     kbuild-all@...ts.01.org, robh+dt@...nel.org, linux@...ck-us.net,
        wim@...ux-watchdog.org, Nicolas.Ferre@...rochip.com,
        alexandre.belloni@...tlin.com, linux-watchdog@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Eugen.Hristev@...rochip.com
Subject: Re: [PATCH v3 1/3] watchdog: sama5d4_wdt: cleanup the bit definitions

Hi,

I love your patch! Perhaps something to improve:

[auto build test WARNING on robh/for-next]
[also build test WARNING on v5.4-rc7 next-20191112]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Eugen-Hristev-microchip-com/watchdog-sama5d4_wdt-cleanup-the-bit-definitions/20191113-023558
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: ia64-allmodconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 7.4.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=7.4.0 make.cross ARCH=ia64 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

   drivers/watchdog/at91sam9_wdt.c: In function 'at91_wdt_reset':
>> drivers/watchdog/at91sam9_wdt.c:43:17: warning: large integer implicitly truncated to unsigned type [-Woverflow]
     writel_relaxed((val), (wdt)->base + (field))
                    ^
>> drivers/watchdog/at91sam9_wdt.c:114:2: note: in expansion of macro 'wdt_write'
     wdt_write(wdt, AT91_WDT_CR, AT91_WDT_KEY | AT91_WDT_WDRSTT);
     ^~~~~~~~~
--
   In file included from drivers/watchdog/sama5d4_wdt.c:19:0:
   drivers/watchdog/sama5d4_wdt.c: In function 'sama5d4_wdt_ping':
>> drivers/watchdog/at91sam9_wdt.h:18:24: warning: large integer implicitly truncated to unsigned type [-Woverflow]
    #define  AT91_WDT_KEY  (0xa5 << 24)  /* KEY Password */
                           ^
>> drivers/watchdog/sama5d4_wdt.c:101:30: note: in expansion of macro 'AT91_WDT_KEY'
     wdt_write(wdt, AT91_WDT_CR, AT91_WDT_KEY | AT91_WDT_WDRSTT);
                                 ^~~~~~~~~~~~

vim +18 drivers/watchdog/at91sam9_wdt.h

eaa595cb881bba include/asm-arm/arch-at91rm9200/at91_wdt.h Andrew Victor                    2006-11-30  15  
c1c30a29df7e47 drivers/watchdog/at91sam9_wdt.h            Jean-Christophe PLAGNIOL-VILLARD 2011-11-02  16  #define AT91_WDT_CR		0x00			/* Watchdog Control Register */
70008fc3a14154 drivers/watchdog/at91sam9_wdt.h            Eugen Hristev                    2019-11-11  17  #define  AT91_WDT_WDRSTT	BIT(0)			/* Restart */
0e5f82dda5e60a include/asm-arm/arch-at91/at91_wdt.h       Andrew Victor                    2007-05-31 @18  #define  AT91_WDT_KEY		(0xa5 << 24)		/* KEY Password */
eaa595cb881bba include/asm-arm/arch-at91rm9200/at91_wdt.h Andrew Victor                    2006-11-30  19  

:::::: The code at line 18 was first introduced by commit
:::::: 0e5f82dda5e60a21cf8ba4f77334d60290277d2c [ARM] 4421/1: AT91: Value of _KEY fields.

:::::: TO: Andrew Victor <andrew@...people.com>
:::::: CC: Russell King <rmk+kernel@....linux.org.uk>

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

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