linux-kernel - drivers/clocksource/timer-of.h:35:28: error: field 'clkevt' has incomplete type

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Message-ID: <201708061254.oLOPy3pH%fengguang.wu@intel.com>
Date:   Sun, 6 Aug 2017 12:11:57 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org
Subject: drivers/clocksource/timer-of.h:35:28: error: field 'clkevt' has
 incomplete type

Hi Daniel,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   0fdd951c9bef93637d5af036851e7a5632fbd6c3
commit: dc11bae78529526605c5c45c369c9512fd012093 clocksource/drivers: Add timer-of common init routine
date:   8 weeks ago
config: ia64-allyesconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 6.2.0
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout dc11bae78529526605c5c45c369c9512fd012093
        # save the attached .config to linux build tree
        make.cross ARCH=ia64 

All errors (new ones prefixed by >>):

   In file included from drivers/clocksource/timer-of.c:25:0:
>> drivers/clocksource/timer-of.h:35:28: error: field 'clkevt' has incomplete type
     struct clock_event_device clkevt;
                               ^~~~~~
   In file included from include/linux/clk.h:16:0,
                    from drivers/clocksource/timer-of.c:18:
   drivers/clocksource/timer-of.h: In function 'to_timer_of':
   include/linux/kernel.h:854:48: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
     const typeof( ((type *)0)->member ) *__mptr = (ptr); \
                                                   ^
   drivers/clocksource/timer-of.h:44:9: note: in expansion of macro 'container_of'
     return container_of(clkevt, struct timer_of, clkevt);
            ^~~~~~~~~~~~
   drivers/clocksource/timer-of.c: In function 'timer_irq_init':
   drivers/clocksource/timer-of.c:63:8: error: dereferencing pointer to incomplete type 'struct clock_event_device'
     clkevt->irq = of_irq->irq;
           ^~
   cc1: some warnings being treated as errors

vim +/clkevt +35 drivers/clocksource/timer-of.h

    32	
    33	struct timer_of {
    34		unsigned int flags;
  > 35		struct clock_event_device clkevt;
    36		struct of_timer_base of_base;
    37		struct of_timer_irq  of_irq;
    38		struct of_timer_clk  of_clk;
    39		void *private_data;
    40	};
    41	

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