linux-kernel - RE: [tip:timers/core 34/34] drivers//clocksource/hyperv_timer.c:264:35: error: 'hv_sched_clock_offset' undeclared; did you mean 'sched_clock

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Date:   Thu, 22 Aug 2019 03:11:42 +0000
From:   Tianyu Lan <Tianyu.Lan@...rosoft.com>
To:     kbuild test robot <lkp@...el.com>
CC:     "kbuild-all@...org" <kbuild-all@...org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "tipbuild@...or.com" <tipbuild@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Michael Kelley <mikelley@...rosoft.com>
Subject: RE: [tip:timers/core 34/34]
 drivers//clocksource/hyperv_timer.c:264:35: error: 'hv_sched_clock_offset'
 undeclared; did you mean 'sched_clock_register'?

Thanks for reporting. I will send out fix patch.

-----Original Message-----
From: kbuild test robot <lkp@...el.com> 
Sent: Thursday, August 22, 2019 10:25 AM
To: Tianyu Lan <Tianyu.Lan@...rosoft.com>
Cc: kbuild-all@...org; linux-kernel@...r.kernel.org; tipbuild@...or.com; Thomas Gleixner <tglx@...utronix.de>; Michael Kelley <mikelley@...rosoft.com>
Subject: [tip:timers/core 34/34] drivers//clocksource/hyperv_timer.c:264:35: error: 'hv_sched_clock_offset' undeclared; did you mean 'sched_clock_register'?

tree:   https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fkernel.googlesource.com%2Fpub%2Fscm%2Flinux%2Fkernel%2Fgit%2Ftip%2Ftip.git&amp;data=02%7C01%7CTianyu.Lan%40microsoft.com%7Cfa01680d45d1424cbbc308d726a82122%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637020378361213701&amp;sdata=56fY4vgmkc4Nk3ZqCZhRyaA%2BmfKSd%2Fp9eYXZUahw5uo%3D&amp;reserved=0 timers/core
head:   b74e1d61dbc614ff35ef3ad9267c61ed06b09051
commit: b74e1d61dbc614ff35ef3ad9267c61ed06b09051 [34/34] clocksource/hyperv: Add Hyper-V specific sched clock function
config: i386-randconfig-g002-201933 (attached as .config)
compiler: gcc-7 (Debian 7.4.0-10) 7.4.0
reproduce:
        git checkout b74e1d61dbc614ff35ef3ad9267c61ed06b09051
        # save the attached .config to linux build tree
        make ARCH=i386 

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

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

   drivers//clocksource/hyperv_timer.c: In function 'read_hv_sched_clock_msr':
>> drivers//clocksource/hyperv_timer.c:264:35: error: 'hv_sched_clock_offset' undeclared (first use in this function); did you mean 'sched_clock_register'?
     return read_hv_clock_msr(NULL) - hv_sched_clock_offset;
                                      ^~~~~~~~~~~~~~~~~~~~~
                                      sched_clock_register
   drivers//clocksource/hyperv_timer.c:264:35: note: each undeclared identifier is reported only once for each function it appears in
   drivers//clocksource/hyperv_timer.c: In function 'hv_init_clocksource':
   drivers//clocksource/hyperv_timer.c:334:2: error: 'hv_sched_clock_offset' undeclared (first use in this function); did you mean 'sched_clock_register'?
     hv_sched_clock_offset = hyperv_cs->read(hyperv_cs);
     ^~~~~~~~~~~~~~~~~~~~~
     sched_clock_register
   drivers//clocksource/hyperv_timer.c: In function 'read_hv_sched_clock_msr':
>> drivers//clocksource/hyperv_timer.c:265:1: warning: control reaches end of non-void function [-Wreturn-type]
    }
    ^

vim +264 drivers//clocksource/hyperv_timer.c

   261	
   262	static u64 read_hv_sched_clock_msr(void)
   263	{
 > 264		return read_hv_clock_msr(NULL) - hv_sched_clock_offset;
 > 265	}
   266	

---
0-DAY kernel test infrastructure                Open Source Technology Center
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