From: kernel test robot <lkp@intel.com>
To: Ben Hutchings <bwh@kernel.org>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: oe-kbuild-all@lists.linux.dev
Subject: [cip:linux-4.19.y-cip-rt-rebase 84/29558] mm/memcontrol.c:98:30: warning: 'event_lock' defined but not used
Date: Mon, 11 Mar 2024 07:23:05 +0800 [thread overview]
Message-ID: <202403110741.klpUMGS4-lkp@intel.com> (raw)
Hi Sebastian,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/cip/linux-cip.git linux-4.19.y-cip-rt-rebase
head: dce1701e767e33da39db64fe691cd4783ec7dbbf
commit: 890617e4e8b335564cdfae4a50909ef420bed9b7 [84/29558] mm/memcontrol: Replace local_irq_disable with local locks
config: arc-randconfig-001-20240303 (https://download.01.org/0day-ci/archive/20240311/202403110741.klpUMGS4-lkp@intel.com/config)
compiler: arc-elf-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240311/202403110741.klpUMGS4-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202403110741.klpUMGS4-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from arch/arc/include/asm/atomic.h:16,
from include/linux/atomic.h:7,
from include/linux/page_counter.h:5,
from mm/memcontrol.c:34:
mm/memcontrol.c: In function 'invalidate_reclaim_iterators':
arch/arc/include/asm/cmpxchg.h:95:29: warning: value computed is not used [-Wunused-value]
95 | #define cmpxchg(ptr, o, n) ((typeof(*(ptr)))__cmpxchg((ptr), \
| ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
96 | (unsigned long)(o), (unsigned long)(n)))
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mm/memcontrol.c:1050:33: note: in expansion of macro 'cmpxchg'
1050 | cmpxchg(&iter->position,
| ^~~~~~~
In file included from include/linux/page_counter.h:6:
mm/memcontrol.c: In function 'mem_cgroup_get_max':
include/linux/kernel.h:878:45: warning: comparison of unsigned expression in '< 0' is always false [-Wtype-limits]
878 | #define min(x, y) __careful_cmp(x, y, <)
| ^
include/linux/kernel.h:861:30: note: in definition of macro '__cmp'
861 | #define __cmp(x, y, op) ((x) op (y) ? (x) : (y))
| ^~
include/linux/kernel.h:878:25: note: in expansion of macro '__careful_cmp'
878 | #define min(x, y) __careful_cmp(x, y, <)
| ^~~~~~~~~~~~~
mm/memcontrol.c:1370:28: note: in expansion of macro 'min'
1370 | swap_max = min(swap_max, (unsigned long)total_swap_pages);
| ^~~
In file included from include/linux/swap.h:15,
from include/linux/shmem_fs.h:6,
from mm/memcontrol.c:39:
mm/memcontrol.c: At top level:
>> mm/memcontrol.c:98:30: warning: 'event_lock' defined but not used [-Wunused-const-variable=]
98 | static DEFINE_LOCAL_IRQ_LOCK(event_lock);
| ^~~~~~~~~~
include/linux/locallock.h:243:71: note: in definition of macro 'DEFINE_LOCAL_IRQ_LOCK'
243 | #define DEFINE_LOCAL_IRQ_LOCK(lvar) __typeof__(const int) lvar
| ^~~~
In file included from mm/memcontrol.c:35:
In function 'mem_cgroup_nodeinfo',
inlined from 'invalidate_reclaim_iterators' at mm/memcontrol.c:1047:9,
inlined from 'mem_cgroup_css_released' at mm/memcontrol.c:4586:2:
include/linux/memcontrol.h:357:31: warning: array subscript nid is outside array bounds of 'struct mem_cgroup_per_node *[0]' [-Warray-bounds=]
357 | return memcg->nodeinfo[nid];
| ~~~~~~~~~~~~~~~^~~~~
include/linux/memcontrol.h: In function 'mem_cgroup_css_released':
include/linux/memcontrol.h:314:37: note: while referencing 'nodeinfo'
314 | struct mem_cgroup_per_node *nodeinfo[0];
| ^~~~~~~~
In file included from arch/arc/include/asm/atomic.h:15:
In function 'memcg_alloc_shrinker_maps',
inlined from 'mem_cgroup_css_online' at mm/memcontrol.c:4545:6:
mm/memcontrol.c:394:51: warning: array subscript nid is outside array bounds of 'struct mem_cgroup_per_node *[0]' [-Warray-bounds=]
394 | rcu_assign_pointer(memcg->nodeinfo[nid]->shrinker_map, map);
| ~~~~~~~~~~~~~~~^~~~~
include/linux/compiler.h:280:29: note: in definition of macro 'WRITE_ONCE'
280 | __write_once_size(&(x), __u.__c, sizeof(x)); \
| ^
include/asm-generic/barrier.h:157:33: note: in expansion of macro '__smp_store_release'
157 | #define smp_store_release(p, v) __smp_store_release(p, v)
| ^~~~~~~~~~~~~~~~~~~
include/linux/rcupdate.h:412:17: note: in expansion of macro 'smp_store_release'
412 | smp_store_release(&p, RCU_INITIALIZER((typeof(p))_r_a_p__v)); \
| ^~~~~~~~~~~~~~~~~
mm/memcontrol.c:394:17: note: in expansion of macro 'rcu_assign_pointer'
394 | rcu_assign_pointer(memcg->nodeinfo[nid]->shrinker_map, map);
| ^~~~~~~~~~~~~~~~~~
include/linux/memcontrol.h: In function 'mem_cgroup_css_online':
include/linux/memcontrol.h:314:37: note: while referencing 'nodeinfo'
314 | struct mem_cgroup_per_node *nodeinfo[0];
| ^~~~~~~~
In function 'mem_cgroup_nodeinfo',
inlined from 'memcg_free_shrinker_maps' at mm/memcontrol.c:369:8,
inlined from 'memcg_free_shrinker_maps' at mm/memcontrol.c:359:13,
inlined from 'memcg_alloc_shrinker_maps' at mm/memcontrol.c:390:4,
inlined from 'mem_cgroup_css_online' at mm/memcontrol.c:4545:6:
include/linux/memcontrol.h:357:31: warning: array subscript nid is outside array bounds of 'struct mem_cgroup_per_node *[0]' [-Warray-bounds=]
357 | return memcg->nodeinfo[nid];
| ~~~~~~~~~~~~~~~^~~~~
include/linux/memcontrol.h: In function 'mem_cgroup_css_online':
include/linux/memcontrol.h:314:37: note: while referencing 'nodeinfo'
314 | struct mem_cgroup_per_node *nodeinfo[0];
| ^~~~~~~~
In function 'mem_cgroup_nodeinfo',
inlined from 'memcg_hotplug_cpu_dead' at mm/memcontrol.c:2091:10:
include/linux/memcontrol.h:357:31: warning: array subscript nid is outside array bounds of 'struct mem_cgroup_per_node *[0]' [-Warray-bounds=]
357 | return memcg->nodeinfo[nid];
| ~~~~~~~~~~~~~~~^~~~~
include/linux/memcontrol.h: In function 'memcg_hotplug_cpu_dead':
include/linux/memcontrol.h:314:37: note: while referencing 'nodeinfo'
314 | struct mem_cgroup_per_node *nodeinfo[0];
| ^~~~~~~~
In function 'mem_cgroup_nodeinfo',
inlined from 'mem_cgroup_lruvec' at include/linux/memcontrol.h:380:7,
inlined from 'mem_cgroup_node_nr_lru_pages' at mm/memcontrol.c:727:26,
inlined from 'mem_cgroup_nr_lru_pages' at mm/memcontrol.c:748:9,
inlined from 'accumulate_memcg_tree' at mm/memcontrol.c:2986:5:
include/linux/memcontrol.h:357:31: warning: array subscript <unknown> is outside array bounds of 'struct mem_cgroup_per_node *[0]' [-Warray-bounds=]
357 | return memcg->nodeinfo[nid];
| ~~~~~~~~~~~~~~~^~~~~
include/linux/memcontrol.h: In function 'accumulate_memcg_tree':
include/linux/memcontrol.h:314:37: note: while referencing 'nodeinfo'
314 | struct mem_cgroup_per_node *nodeinfo[0];
| ^~~~~~~~
In function 'mem_cgroup_nodeinfo',
inlined from 'memcg_stat_show' at mm/memcontrol.c:3461:9:
include/linux/memcontrol.h:357:31: warning: array subscript <unknown> is outside array bounds of 'struct mem_cgroup_per_node *[0]' [-Warray-bounds=]
357 | return memcg->nodeinfo[nid];
| ~~~~~~~~~~~~~~~^~~~~
include/linux/memcontrol.h: In function 'memcg_stat_show':
include/linux/memcontrol.h:314:37: note: while referencing 'nodeinfo'
314 | struct mem_cgroup_per_node *nodeinfo[0];
| ^~~~~~~~
In function 'mem_cgroup_nodeinfo',
inlined from 'mem_cgroup_lruvec' at include/linux/memcontrol.h:380:7,
inlined from 'mem_cgroup_node_nr_lru_pages' at mm/memcontrol.c:727:26,
inlined from 'mem_cgroup_nr_lru_pages' at mm/memcontrol.c:748:9,
inlined from 'memcg_stat_show' at mm/memcontrol.c:3416:7:
include/linux/memcontrol.h:357:31: warning: array subscript <unknown> is outside array bounds of 'struct mem_cgroup_per_node *[0]' [-Warray-bounds=]
357 | return memcg->nodeinfo[nid];
| ~~~~~~~~~~~~~~~^~~~~
include/linux/memcontrol.h: In function 'memcg_stat_show':
include/linux/memcontrol.h:314:37: note: while referencing 'nodeinfo'
314 | struct mem_cgroup_per_node *nodeinfo[0];
| ^~~~~~~~
In function 'mem_cgroup_nodeinfo',
inlined from 'memcg_free_shrinker_maps' at mm/memcontrol.c:369:8,
inlined from 'memcg_free_shrinker_maps' at mm/memcontrol.c:359:13,
inlined from 'mem_cgroup_css_free' at mm/memcontrol.c:4602:2:
include/linux/memcontrol.h:357:31: warning: array subscript nid is outside array bounds of 'struct mem_cgroup_per_node *[0]' [-Warray-bounds=]
357 | return memcg->nodeinfo[nid];
| ~~~~~~~~~~~~~~~^~~~~
include/linux/memcontrol.h: In function 'mem_cgroup_css_free':
vim +/event_lock +98 mm/memcontrol.c
97
> 98 static DEFINE_LOCAL_IRQ_LOCK(event_lock);
99
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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