* [linux-rt-devel:linux-5.4.y-rt-rebase 125/282] mm/memcontrol.c:2268:11: error: implicit declaration of function 'get_cpu_light'; did you mean 'get_cpu_mask'?
@ 2020-02-15 8:10 kbuild test robot
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From: kbuild test robot @ 2020-02-15 8:10 UTC (permalink / raw)
To: kbuild-all
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-5.4.y-rt-rebase
head: 964adfc6507208b201ce44e346375624b0b7a65a
commit: a64ba411ef1f57d3b882a4429c28bdff5e12ca63 [125/282] mm/memcontrol: Don't call schedule_work_on in preemption disabled context
config: m68k-allmodconfig (attached as .config)
compiler: m68k-linux-gcc (GCC) 7.5.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
git checkout a64ba411ef1f57d3b882a4429c28bdff5e12ca63
# save the attached .config to linux build tree
GCC_VERSION=7.5.0 make.cross ARCH=m68k
If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>
Note: the linux-rt-devel/linux-5.4.y-rt-rebase HEAD 964adfc6507208b201ce44e346375624b0b7a65a builds fine.
It only hurts bisectibility.
All errors (new ones prefixed by >>):
In file included from arch/m68k/include/asm/atomic.h:7:0,
from include/linux/atomic.h:7,
from include/linux/page_counter.h:5,
from mm/memcontrol.c:25:
mm/memcontrol.c: In function '__invalidate_reclaim_iterators':
arch/m68k/include/asm/cmpxchg.h:122:3: warning: value computed is not used [-Wunused-value]
((__typeof__(*(ptr)))__cmpxchg((ptr), (unsigned long)(o), \
~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
(unsigned long)(n), sizeof(*(ptr))))
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mm/memcontrol.c:1161:4: note: in expansion of macro 'cmpxchg'
cmpxchg(&iter->position,
^~~~~~~
mm/memcontrol.c: In function 'drain_all_stock':
>> mm/memcontrol.c:2268:11: error: implicit declaration of function 'get_cpu_light'; did you mean 'get_cpu_mask'? [-Werror=implicit-function-declaration]
curcpu = get_cpu_light();
^~~~~~~~~~~~~
get_cpu_mask
>> mm/memcontrol.c:2289:2: error: implicit declaration of function 'put_cpu_light'; did you mean 'fput_light'? [-Werror=implicit-function-declaration]
put_cpu_light();
^~~~~~~~~~~~~
fput_light
cc1: some warnings being treated as errors
vim +2268 mm/memcontrol.c
2250
2251 /*
2252 * Drains all per-CPU charge caches for given root_memcg resp. subtree
2253 * of the hierarchy under it.
2254 */
2255 static void drain_all_stock(struct mem_cgroup *root_memcg)
2256 {
2257 int cpu, curcpu;
2258
2259 /* If someone's already draining, avoid adding running more workers. */
2260 if (!mutex_trylock(&percpu_charge_mutex))
2261 return;
2262 /*
2263 * Notify other cpus that system-wide "drain" is running
2264 * We do not care about races with the cpu hotplug because cpu down
2265 * as well as workers from this path always operate on the local
2266 * per-cpu data. CPU up doesn't touch memcg_stock at all.
2267 */
> 2268 curcpu = get_cpu_light();
2269 for_each_online_cpu(cpu) {
2270 struct memcg_stock_pcp *stock = &per_cpu(memcg_stock, cpu);
2271 struct mem_cgroup *memcg;
2272 bool flush = false;
2273
2274 rcu_read_lock();
2275 memcg = stock->cached;
2276 if (memcg && stock->nr_pages &&
2277 mem_cgroup_is_descendant(memcg, root_memcg))
2278 flush = true;
2279 rcu_read_unlock();
2280
2281 if (flush &&
2282 !test_and_set_bit(FLUSHING_CACHED_CHARGE, &stock->flags)) {
2283 if (cpu == curcpu)
2284 drain_local_stock(&stock->work);
2285 else
2286 schedule_work_on(cpu, &stock->work);
2287 }
2288 }
> 2289 put_cpu_light();
2290 mutex_unlock(&percpu_charge_mutex);
2291 }
2292
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
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2020-02-15 8:10 [linux-rt-devel:linux-5.4.y-rt-rebase 125/282] mm/memcontrol.c:2268:11: error: implicit declaration of function 'get_cpu_light'; did you mean 'get_cpu_mask'? kbuild test robot
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