[android-common:android13-5.10-2026-10 1/1] mm/page_alloc.c:6789:16: sparse: sparse: incorrect type in assignment (different address spaces)

[android-common:android13-5.10-2026-10 1/1] mm/page_alloc.c:6789:16: sparse: sparse: incorrect type in assignment (different address spaces)

[kernel test robot]

tree:   https://android.googlesource.com/kernel/common android13-5.10-2026-10
head:   a4c2f82969bc5fa7fcc21ede4b690ece7ff72335
commit: 42596c7b41c85be2647f23da66cda4b0a0c242e1 [1/1] ANDROID: fix ABI breakage caused by per_cpu_pages
config: arm64-randconfig-r2309-20261018 (https://download.01.org/0day-ci/archive/20261027/202610271107.YfAcC0zm-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 11.5.0
sparse: v0.6.5-rc1-1-gc4640450
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261027/202610271107.YfAcC0zm-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/202610271107.YfAcC0zm-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> mm/page_alloc.c:6789:16: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct per_cpu_pageset_ext *ps_ext @@     got struct per_cpu_pageset_ext [noderef] __percpu * @@
   mm/page_alloc.c:6789:16: sparse:     expected struct per_cpu_pageset_ext *ps_ext
   mm/page_alloc.c:6789:16: sparse:     got struct per_cpu_pageset_ext [noderef] __percpu *
>> mm/page_alloc.c:6790:23: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct per_cpu_pageset [noderef] __percpu *pageset @@     got struct per_cpu_pageset * @@
   mm/page_alloc.c:6790:23: sparse:     expected struct per_cpu_pageset [noderef] __percpu *pageset
   mm/page_alloc.c:6790:23: sparse:     got struct per_cpu_pageset *
   mm/page_alloc.c:3365:28: sparse: sparse: context imbalance in 'free_unref_page_commit' - unexpected unlock
   mm/page_alloc.c:3687:20: sparse: sparse: context imbalance in '__rmqueue_pcplist' - different lock contexts for basic block
   mm/page_alloc.c: note: in included file (through include/linux/mm.h):
   include/linux/gfp.h:369:27: sparse: sparse: restricted gfp_t degrades to integer
   include/linux/gfp.h:369:27: sparse: sparse: restricted gfp_t degrades to integer
   include/linux/gfp.h:369:27: sparse: sparse: restricted gfp_t degrades to integer
   include/linux/gfp.h:369:27: sparse: sparse: restricted gfp_t degrades to integer

vim +6789 mm/page_alloc.c

  6783	
  6784	void __meminit setup_zone_pageset(struct zone *zone)
  6785	{
  6786		int cpu;
  6787		struct per_cpu_pageset_ext *ps_ext;
  6788	
> 6789		ps_ext = alloc_percpu(struct per_cpu_pageset_ext);
> 6790		zone->pageset = &ps_ext->pageset;
  6791		for_each_possible_cpu(cpu)
  6792			zone_pageset_init(zone, cpu);
  6793	}
  6794	

--
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