linux-kernel - Re: [PATCH v2] sched/deadline: Fix the intention to re-evalute tick dependency for offline cpu

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Date:	Fri, 12 Aug 2016 16:54:45 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Wanpeng Li <kernellwp@...il.com>
Cc:	kbuild-all@...org, linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org, Wanpeng Li <wanpeng.li@...mail.com>,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Juri Lelli <juri.lelli@....com>,
	Luca Abeni <luca.abeni@...tn.it>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [PATCH v2] sched/deadline: Fix the intention to re-evalute tick
 dependency for offline cpu

Hi Wanpeng,

[auto build test ERROR on tip/sched/core]
[also build test ERROR on v4.8-rc1 next-20160811]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Wanpeng-Li/sched-deadline-Fix-the-intention-to-re-evalute-tick-dependency-for-offline-cpu/20160812-162528
config: x86_64-randconfig-x013-201632 (attached as .config)
compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

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

   In file included from include/uapi/linux/stddef.h:1:0,
                    from include/linux/stddef.h:4,
                    from include/uapi/linux/posix_types.h:4,
                    from include/uapi/linux/types.h:13,
                    from include/linux/types.h:5,
                    from include/uapi/linux/capability.h:16,
                    from include/linux/capability.h:15,
                    from include/linux/sched.h:15,
                    from kernel/sched/sched.h:2,
                    from kernel/sched/deadline.c:17:
   kernel/sched/deadline.c: In function 'dl_task_timer':
>> kernel/sched/deadline.c:644:18: error: 'struct rq' has no member named 'online'
     if (unlikely(!rq->online))
                     ^
   include/linux/compiler.h:139:45: note: in definition of macro 'unlikely'
    #  define unlikely(x) (__builtin_constant_p(x) ? !!(x) : __branch_check__(x, 0))
                                                ^
>> kernel/sched/deadline.c:644:18: error: 'struct rq' has no member named 'online'
     if (unlikely(!rq->online))
                     ^
   include/linux/compiler.h:139:53: note: in definition of macro 'unlikely'
    #  define unlikely(x) (__builtin_constant_p(x) ? !!(x) : __branch_check__(x, 0))
                                                        ^
>> kernel/sched/deadline.c:644:18: error: 'struct rq' has no member named 'online'
     if (unlikely(!rq->online))
                     ^
   include/linux/compiler.h:112:47: note: in definition of macro 'likely_notrace'
    #define likely_notrace(x) __builtin_expect(!!(x), 1)
                                                  ^
   include/linux/compiler.h:139:58: note: in expansion of macro '__branch_check__'
    #  define unlikely(x) (__builtin_constant_p(x) ? !!(x) : __branch_check__(x, 0))
                                                             ^~~~~~~~~~~~~~~~
>> kernel/sched/deadline.c:644:6: note: in expansion of macro 'unlikely'
     if (unlikely(!rq->online))
         ^~~~~~~~

vim +644 kernel/sched/deadline.c

   638		 */
   639		if (!task_on_rq_queued(p)) {
   640			replenish_dl_entity(dl_se, dl_se);
   641			goto unlock;
   642		}
   643	
 > 644		if (unlikely(!rq->online))
   645			replenish_dl_entity(dl_se, dl_se);
   646		else {
   647			enqueue_task_dl(rq, p, ENQUEUE_REPLENISH);

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