[openeuler:OLK-6.6 2303/2356] mm/memcontrol.c:4428:12: warning: 'mem_cgroup_check_swap_for_v1' defined but not used

[openeuler:OLK-6.6 2303/2356] mm/memcontrol.c:4428:12: warning: 'mem_cgroup_check_swap_for_v1' defined but not used

[kernel test robot]

tree:   https://gitee.com/openeuler/kernel.git OLK-6.6
head:   ea6de9f6732d495c506f9c140b4ec17c957e1b77
commit: a095a940f784db58ea4e87df361f9a4fd0dd977f [2303/2356] memcg: add restrict to swap to cgroup1
config: arm64-randconfig-003-20240111 (https://download.01.org/0day-ci/archive/20240111/202401112227.IrFM3SmF-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240111/202401112227.IrFM3SmF-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/202401112227.IrFM3SmF-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> mm/memcontrol.c:4428:12: warning: 'mem_cgroup_check_swap_for_v1' defined but not used [-Wunused-function]
    4428 | static int mem_cgroup_check_swap_for_v1(struct folio *folio, swp_entry_t entry)
         |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/mem_cgroup_check_swap_for_v1 +4428 mm/memcontrol.c

  4427	
> 4428	static int mem_cgroup_check_swap_for_v1(struct folio *folio, swp_entry_t entry)
  4429	{
  4430		return 0;
  4431	}
  4432	#endif
  4433	

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