linux-kernel - Re: [PATCH] Mips32 gettimeofday fix

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Date:   Sun, 1 Dec 2019 11:08:10 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Vincenzo Frascino <vincenzo.frascino@....com>
Cc:     kbuild-all@...ts.01.org,
        "H. Nikolaus Schaller" <hns@...delico.com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Maarten ter Huurne <maarten@...ewalker.org>,
        mips-creator-ci20-dev@...glegroups.com,
        Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...s.com>, linux-mips@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Discussions about the Letux Kernel 
        <letux-kernel@...nphoenux.org>
Subject: Re: [PATCH] Mips32 gettimeofday fix

Hi Vincenzo,

I love your patch! Yet something to improve:

[auto build test ERROR on linus/master]
[cannot apply to v5.4 next-20191129]
[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/Vincenzo-Frascino/Mips32-gettimeofday-fix/20191129-022306
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git a6ed68d6468bd5a3da78a103344ded1435fed57a
config: mips-jmr3927_defconfig (attached as .config)
compiler: mips-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=mips 

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

All errors (new ones prefixed by >>):

   In file included from <command-line>:0:0:
   lib/vdso/gettimeofday.c: In function '__cvdso_gettimeofday':
>> lib/vdso/gettimeofday.c:152:11: error: implicit declaration of function 'gettimeofday_fallback'; did you mean 'clock_gettime32_fallback'? [-Werror=implicit-function-declaration]
       return gettimeofday_fallback(tv, tz);
              ^~~~~~~~~~~~~~~~~~~~~
              clock_gettime32_fallback
   cc1: all warnings being treated as errors

vim +152 lib/vdso/gettimeofday.c

00b26474c2f161 Vincenzo Frascino 2019-06-21  142  
00b26474c2f161 Vincenzo Frascino 2019-06-21  143  static __maybe_unused int
00b26474c2f161 Vincenzo Frascino 2019-06-21  144  __cvdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz)
00b26474c2f161 Vincenzo Frascino 2019-06-21  145  {
00b26474c2f161 Vincenzo Frascino 2019-06-21  146  	const struct vdso_data *vd = __arch_get_vdso_data();
00b26474c2f161 Vincenzo Frascino 2019-06-21  147  
00b26474c2f161 Vincenzo Frascino 2019-06-21  148  	if (likely(tv != NULL)) {
00b26474c2f161 Vincenzo Frascino 2019-06-21  149  		struct __kernel_timespec ts;
00b26474c2f161 Vincenzo Frascino 2019-06-21  150  
00b26474c2f161 Vincenzo Frascino 2019-06-21  151  		if (do_hres(&vd[CS_HRES_COARSE], CLOCK_REALTIME, &ts))
00b26474c2f161 Vincenzo Frascino 2019-06-21 @152  			return gettimeofday_fallback(tv, tz);
00b26474c2f161 Vincenzo Frascino 2019-06-21  153  
00b26474c2f161 Vincenzo Frascino 2019-06-21  154  		tv->tv_sec = ts.tv_sec;
00b26474c2f161 Vincenzo Frascino 2019-06-21  155  		tv->tv_usec = (u32)ts.tv_nsec / NSEC_PER_USEC;
00b26474c2f161 Vincenzo Frascino 2019-06-21  156  	}
00b26474c2f161 Vincenzo Frascino 2019-06-21  157  
00b26474c2f161 Vincenzo Frascino 2019-06-21  158  	if (unlikely(tz != NULL)) {
00b26474c2f161 Vincenzo Frascino 2019-06-21  159  		tz->tz_minuteswest = vd[CS_HRES_COARSE].tz_minuteswest;
00b26474c2f161 Vincenzo Frascino 2019-06-21  160  		tz->tz_dsttime = vd[CS_HRES_COARSE].tz_dsttime;
00b26474c2f161 Vincenzo Frascino 2019-06-21  161  	}
00b26474c2f161 Vincenzo Frascino 2019-06-21  162  
00b26474c2f161 Vincenzo Frascino 2019-06-21  163  	return 0;
00b26474c2f161 Vincenzo Frascino 2019-06-21  164  }
00b26474c2f161 Vincenzo Frascino 2019-06-21  165  

:::::: The code at line 152 was first introduced by commit
:::::: 00b26474c2f1613d7ab894c525f775c67c8a9e8f lib/vdso: Provide generic VDSO implementation

:::::: TO: Vincenzo Frascino <vincenzo.frascino@....com>
:::::: CC: Thomas Gleixner <tglx@...utronix.de>

---
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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