[linux-next:master 3382/3950] mm/zswap.c:48:15: sparse: sparse: symbol 'zswap_stored_incompressible_pages' was not declared. Should it be static?

[kernel test robot <lkp@intel.com>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   7fa4d8dc380fbd81a9d702a855c50690c9c6442c
commit: 6d522abd7b4fc78d51934e6c9a53d8e2349f5d3e [3382/3950] mm/zswap: store <PAGE_SIZE compression failed page as-is
config: arc-randconfig-r123-20250821 (https://download.01.org/0day-ci/archive/20250821/202508211706.DnJPQQMn-lkp@intel.com/config)
compiler: arc-linux-gcc (GCC) 13.4.0
reproduce: (https://download.01.org/0day-ci/archive/20250821/202508211706.DnJPQQMn-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/202508211706.DnJPQQMn-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   mm/zswap.c: note: in included file (through arch/arc/include/asm/cacheflush.h, include/linux/cacheflush.h, include/linux/highmem.h):
   include/linux/mm.h:80:9: sparse: sparse: preprocessor token PAGES_TO_MB redefined
   mm/zswap.c: note: in included file (through arch/arc/include/asm/irqflags-compact.h, arch/arc/include/asm/irqflags.h, include/linux/irqflags.h, ...):
   arch/arc/include/asm/arcregs.h:155:9: sparse: this was the original definition
>> mm/zswap.c:48:15: sparse: sparse: symbol 'zswap_stored_incompressible_pages' was not declared. Should it be static?
   mm/zswap.c:1250:23: sparse: sparse: context imbalance in 'shrink_memcg_cb' - unexpected unlock

vim +/zswap_stored_incompressible_pages +48 mm/zswap.c

    41	
    42	/*********************************
    43	* statistics
    44	**********************************/
    45	/* The number of pages currently stored in zswap */
    46	atomic_long_t zswap_stored_pages = ATOMIC_LONG_INIT(0);
    47	/* The number of incompressible pages currently stored in zswap */
  > 48	atomic_long_t zswap_stored_incompressible_pages = ATOMIC_LONG_INIT(0);
    49	

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