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

From: kbuild test robot
Date: Fri Aug 12 2016 - 04:58:47 EST

Hi Wanpeng,

[auto build test WARNING on tip/sched/core]
[also build test WARNING 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-x019-201632 (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 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:149:30: note: in definition of macro '__trace_if'
if (__builtin_constant_p(!!(cond)) ? !!(cond) : \
^~~~
>> kernel/sched/deadline.c:644:2: note: in expansion of macro 'if'
if (unlikely(!rq->online))
^~
kernel/sched/deadline.c:644:6: note: in expansion of macro 'unlikely'
if (unlikely(!rq->online))
^~~~~~~~
kernel/sched/deadline.c:644:18: error: 'struct rq' has no member named 'online'
if (unlikely(!rq->online))
^
include/linux/compiler.h:149:30: note: in definition of macro '__trace_if'
if (__builtin_constant_p(!!(cond)) ? !!(cond) : \
^~~~
>> kernel/sched/deadline.c:644:2: note: in expansion of macro 'if'
if (unlikely(!rq->online))
^~
kernel/sched/deadline.c:644:6: note: in expansion of macro 'unlikely'
if (unlikely(!rq->online))
^~~~~~~~
kernel/sched/deadline.c:644:18: error: 'struct rq' has no member named 'online'
if (unlikely(!rq->online))
^
include/linux/compiler.h:149:30: note: in definition of macro '__trace_if'
if (__builtin_constant_p(!!(cond)) ? !!(cond) : \
^~~~
>> kernel/sched/deadline.c:644:2: note: in expansion of macro 'if'
if (unlikely(!rq->online))
^~
include/linux/compiler.h:125:14: note: in expansion of macro 'likely_notrace'
______r = likely_notrace(x); \
^~~~~~~~~~~~~~
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))
^~~~~~~~
kernel/sched/deadline.c:644:18: error: 'struct rq' has no member named 'online'
if (unlikely(!rq->online))
^
include/linux/compiler.h:149:42: note: in definition of macro '__trace_if'
if (__builtin_constant_p(!!(cond)) ? !!(cond) : \
^~~~
>> kernel/sched/deadline.c:644:2: note: in expansion of macro 'if'
if (unlikely(!rq->online))
^~
kernel/sched/deadline.c:644:6: note: in expansion of macro 'unlikely'
if (unlikely(!rq->online))
^~~~~~~~
kernel/sched/deadline.c:644:18: error: 'struct rq' has no member named 'online'
if (unlikely(!rq->online))
^
include/linux/compiler.h:149:42: note: in definition of macro '__trace_if'
if (__builtin_constant_p(!!(cond)) ? !!(cond) : \
^~~~
>> kernel/sched/deadline.c:644:2: note: in expansion of macro 'if'
if (unlikely(!rq->online))
^~
kernel/sched/deadline.c:644:6: note: in expansion of macro 'unlikely'
if (unlikely(!rq->online))
^~~~~~~~
kernel/sched/deadline.c:644:18: error: 'struct rq' has no member named 'online'
if (unlikely(!rq->online))
^
include/linux/compiler.h:149:42: note: in definition of macro '__trace_if'
if (__builtin_constant_p(!!(cond)) ? !!(cond) : \
^~~~
>> kernel/sched/deadline.c:644:2: note: in expansion of macro 'if'
if (unlikely(!rq->online))
^~
include/linux/compiler.h:125:14: note: in expansion of macro 'likely_notrace'
______r = likely_notrace(x); \
^~~~~~~~~~~~~~
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))
^~~~~~~~
kernel/sched/deadline.c:644:18: error: 'struct rq' has no member named 'online'
if (unlikely(!rq->online))
^
include/linux/compiler.h:160:16: note: in definition of macro '__trace_if'
______r = !!(cond); \
^~~~
>> kernel/sched/deadline.c:644:2: note: in expansion of macro 'if'
if (unlikely(!rq->online))
^~
kernel/sched/deadline.c:644:6: note: in expansion of macro 'unlikely'
if (unlikely(!rq->online))
^~~~~~~~
kernel/sched/deadline.c:644:18: error: 'struct rq' has no member named 'online'
if (unlikely(!rq->online))
^
include/linux/compiler.h:160:16: note: in definition of macro '__trace_if'
______r = !!(cond); \
^~~~
>> kernel/sched/deadline.c:644:2: note: in expansion of macro 'if'
if (unlikely(!rq->online))
^~
kernel/sched/deadline.c:644:6: note: in expansion of macro 'unlikely'
if (unlikely(!rq->online))
^~~~~~~~
kernel/sched/deadline.c:644:18: error: 'struct rq' has no member named 'online'
if (unlikely(!rq->online))
^
include/linux/compiler.h:160:16: note: in definition of macro '__trace_if'
______r = !!(cond); \
^~~~
>> kernel/sched/deadline.c:644:2: note: in expansion of macro 'if'
if (unlikely(!rq->online))
^~
include/linux/compiler.h:125:14: note: in expansion of macro 'likely_notrace'
______r = likely_notrace(x); \
^~~~~~~~~~~~~~
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 +/if +644 kernel/sched/deadline.c

628 * schedule()
629 * deactivate_task()
630 * dequeue_task_dl()
631 * update_curr_dl()
632 * start_dl_timer()
633 * __dequeue_task_dl()
634 * prev->on_rq = 0;
635 *
636 * We can be both throttled and !queued. Replenish the counter
637 * but do not enqueue -- wait for our wakeup to do that.
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);
648 if (dl_task(rq->curr))
649 check_preempt_curr_dl(rq, p, 0);
650 else
651 resched_curr(rq);
652 }

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