linux-kernel - [tip:timers/urgent 2/4] include/linux/futex.h:10:51: error: unknown type name 'ktime

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Date:   Sun, 25 Dec 2016 22:55:38 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org, tipbuild@...or.com
Subject: [tip:timers/urgent 2/4] include/linux/futex.h:10:51: error: unknown
 type name 'ktime_t'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers/urgent
head:   75f62a4c59d4fce751f8ee71f87955943fd69b74
commit: 64dac5c9e0f5a933e4520f0cb689b7b143925207 [2/4] ktime: Get rid of the union
config: frv-defconfig (attached as .config)
compiler: frv-linux-gcc (GCC) 6.2.0
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 64dac5c9e0f5a933e4520f0cb689b7b143925207
        # save the attached .config to linux build tree
        make.cross ARCH=frv 

All errors (new ones prefixed by >>):

   In file included from arch/frv/kernel/futex.c:12:0:
>> include/linux/futex.h:10:51: error: unknown type name 'ktime_t'
    long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout,
                                                      ^~~~~~~

vim +/ktime_t +10 include/linux/futex.h

     4	#include <uapi/linux/futex.h>
     5	
     6	struct inode;
     7	struct mm_struct;
     8	struct task_struct;
     9	
  > 10	long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout,
    11		      u32 __user *uaddr2, u32 val2, u32 val3);
    12	
    13	extern int

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