2:46 a.m.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/wip2
head: fb0089110c5e29151c75028add05458ad2bf8a68
commit: b89bc5672b8331856b35fa6f63117c9832dd7416 [3/5] sched/core: Wait for tasks being
pushed away on hotplug
config: alpha-allyesconfig (attached as .config)
compiler: alpha-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O
~/bin/make.cross
chmod +x ~/bin/make.cross
git checkout b89bc5672b8331856b35fa6f63117c9832dd7416
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=alpha
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All errors (new ones prefixed by >>):
kernel/sched/core.c:2380:6: warning: no previous prototype for
'sched_set_stop_task' [-Wmissing-prototypes]
2380 | void sched_set_stop_task(int cpu, struct task_struct *stop)
| ^~~~~~~~~~~~~~~~~~~
In file included from include/linux/percpu-rwsem.h:7,
from include/linux/fs.h:33,
from include/linux/huge_mm.h:8,
from include/linux/mm.h:677,
from arch/alpha/include/asm/io.h:8,
from include/linux/clocksource.h:21,
from include/linux/clockchips.h:14,
from include/linux/tick.h:8,
from include/linux/sched/isolation.h:6,
from kernel/sched/sched.h:17,
from kernel/sched/core.c:13:
kernel/sched/core.c: In function 'balance_hotplug_wait':
> kernel/sched/core.c:2601:24: error: 'struct rq' has no
member named 'hotplug_wait'
2601 |
rcuwait_wait_event(&rq->hotplug_wait, rq->nr_running == 1,
| ^~
include/linux/rcuwait.h:59:21: note: in definition of macro
'rcuwait_wait_event'
59 | prepare_to_rcuwait(w); \
| ^
> kernel/sched/core.c:2601:24: error: 'struct rq' has no
member named 'hotplug_wait'
2601 |
rcuwait_wait_event(&rq->hotplug_wait, rq->nr_running == 1,
| ^~
include/linux/rcuwait.h:76:17: note: in definition of macro
'rcuwait_wait_event'
76 | finish_rcuwait(w); \
| ^
kernel/sched/core.c: In function 'schedule_tail':
kernel/sched/core.c:3765:13: warning: variable 'rq' set but not used
[-Wunused-but-set-variable]
3765 | struct rq *rq;
| ^~
kernel/sched/core.c: At top level:
> kernel/sched/core.c:6968:20: error: redefinition of
'balance_hotplug_wait'
6968 | static inline void
balance_hotplug_wait(void) { }
| ^~~~~~~~~~~~~~~~~~~~
kernel/sched/core.c:2597:13: note: previous definition of
'balance_hotplug_wait' was here
2597 | static void balance_hotplug_wait(void)
| ^~~~~~~~~~~~~~~~~~~~
kernel/sched/core.c: In function 'sched_cpu_activate':
kernel/sched/core.c:7055:2: error: implicit declaration of function
'balance_push_set'; did you mean 'balance_push'?
[-Werror=implicit-function-declaration]
7055 | balance_push_set(cpu, false);
| ^~~~~~~~~~~~~~~~
| balance_push
At top level:
kernel/sched/core.c:2597:13: warning: 'balance_hotplug_wait' defined but not
used [-Wunused-function]
2597 | static void balance_hotplug_wait(void)
| ^~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
#
https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?...
git remote add peterz-queue
https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git
git fetch --no-tags peterz-queue sched/wip2
git checkout b89bc5672b8331856b35fa6f63117c9832dd7416
vim +2601 kernel/sched/core.c
2590
2591 /*
2592 * Invoked from a CPUs hotplug control thread after the CPU has been marked
2593 * inactive. All tasks which are not per CPU kernel threads are either
2594 * pushed off this CPU now via balance_push() or placed on a different CPU
2595 * during wakeup. Wait until the CPU is quiescent.
2596 */
2597 static void balance_hotplug_wait(void)
2598 {
2599 struct rq *rq = this_rq();
2600
2601 rcuwait_wait_event(&rq->hotplug_wait, rq->nr_running
== 1,
2602 TASK_UNINTERRUPTIBLE);
2603 }
2604
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org