[zen-kernel-zen-kernel:5.14/lru-v3 9/18] mm/vmscan.c:2938:3-8: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)

[zen-kernel-zen-kernel:5.14/lru-v3 9/18] mm/vmscan.c:2938:3-8: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)

[kernel test robot]

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CC: kbuild-all(a)lists.01.org
TO: steven(a)liquorix.net

tree:   https://github.com/zen-kernel/zen-kernel 5.14/lru-v3
head:   58423b0ba935bb76ff3f6754703e8fb8533ecae3
commit: 3b838ec127aaaa0b5121fbffb2eaee9f2d014a7e [9/18] mm: multigenerational lru: mm_struct list
:::::: branch date: 4 days ago
:::::: commit date: 4 days ago
config: i386-randconfig-c021-20210906 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Julia Lawall <julia.lawall@lip6.fr>


cocci warnings: (new ones prefixed by >>)
>> mm/vmscan.c:2938:3-8: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
   mm/vmscan.c:3094:15-21: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)

Please review and possibly fold the followup patch.

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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[PATCH] mm: multigenerational lru: fix flexible_array.cocci warnings

[kernel test robot]

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CC: kbuild-all(a)lists.01.org
TO: steven(a)liquorix.net

From: kernel test robot <lkp@intel.com>

mm/vmscan.c:2938:3-8: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
mm/vmscan.c:3094:15-21: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)


 Zero-length and one-element arrays are deprecated, see
 Documentation/process/deprecated.rst
 Flexible-array members should be used instead.

Generated by: scripts/coccinelle/misc/flexible_array.cocci

Fixes: 3b838ec127aa ("mm: multigenerational lru: mm_struct list")
CC: Yu Zhao <yuzhao@google.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: kernel test robot <lkp@intel.com>
---

tree:   https://github.com/zen-kernel/zen-kernel 5.14/lru-v3
head:   58423b0ba935bb76ff3f6754703e8fb8533ecae3
commit: 3b838ec127aaaa0b5121fbffb2eaee9f2d014a7e [9/18] mm: multigenerational lru: mm_struct list
:::::: branch date: 4 days ago
:::::: commit date: 4 days ago

Please take the patch only if it's a positive warning. Thanks!

 vmscan.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2935,7 +2935,7 @@ struct lru_gen_mm_list {
 		int nr_workers;
 		/* stats for debugging */
 		unsigned long stats[NR_STAT_GENS][NR_MM_STATS];
-	} nodes[0];
+	} nodes[];
 };
 
 static struct lru_gen_mm_list *global_mm_list;
@@ -3091,7 +3091,7 @@ struct mm_walk_args {
 	int batch_size;
 	int nr_pages[MAX_NR_GENS][ANON_AND_FILE][MAX_NR_ZONES];
 	int mm_stats[NR_MM_STATS];
-	unsigned long bitmap[0];
+	unsigned long bitmap[];
 };
 
 static int size_of_mm_walk_args(void)