Re: [PATCH v4 bpf] xsk: fix immature cq descriptor production

Hi Maciej,

kernel test robot noticed the following build warnings:

[auto build test WARNING on bpf/master]

url:    https://github.com/intel-lab-lkp/linux/commits/Maciej-Fijalkowski/xsk-fix-immature-cq-descriptor-production/20250814-012129
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git master
patch link:    https://lore.kernel.org/r/20250813171210.2205259-1-maciej.fijalkowski%40intel.com
patch subject: [PATCH v4 bpf] xsk: fix immature cq descriptor production
config: x86_64-randconfig-121-20250817 (https://download.01.org/0day-ci/archive/20250818/202508180712.ZeSSNfkM-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14+deb12u1) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250818/202508180712.ZeSSNfkM-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 [off-list ref]
| Closes: https://lore.kernel.org/oe-kbuild-all/202508180712.ZeSSNfkM-lkp@intel.com/ (local)

sparse warnings: (new ones prefixed by >>)

quoted

net/xdp/xsk.c:49:1: sparse: sparse: symbol '__pcpu_scope_system_xsk_generic_cache' was not declared. Should it be static?

vim +/__pcpu_scope_system_xsk_generic_cache +49 net/xdp/xsk.c

    48	
  > 49	DEFINE_PER_CPU(struct xsk_generic_cache, system_xsk_generic_cache);
    50	

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