[riteshharjani:kfence-fix-wip6 10/10] arch/powerpc/mm/book3s64/hash_utils.c:1077:37: warning: address of function 'kasan_early_init' will always evaluate to 'true'

[riteshharjani:kfence-fix-wip6 10/10] arch/powerpc/mm/book3s64/hash_utils.c:1077:37: warning: address of function 'kasan_early_init' will always evaluate to 'true'

[kernel test robot]

tree:   https://github.com/riteshharjani/linux kfence-fix-wip6
head:   28d73773290c65f55d22e038b4f13c5c4941a561
commit: 28d73773290c65f55d22e038b4f13c5c4941a561 [10/10] kfence: disable if not early init
config: powerpc64-randconfig-003-20240724 (https://download.01.org/0day-ci/archive/20240724/202407241025.18f01Xds-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project ad154281230d83ee551e12d5be48bb956ef47ed3)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240724/202407241025.18f01Xds-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/202407241025.18f01Xds-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from arch/powerpc/mm/book3s64/hash_utils.c:32:
   In file included from include/linux/memblock.h:12:
   In file included from include/linux/mm.h:2253:
   include/linux/vmstat.h:500:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     500 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     501 |                            item];
         |                            ~~~~
   include/linux/vmstat.h:507:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     507 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     508 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     514 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   include/linux/vmstat.h:519:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     519 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     520 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:528:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     528 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     529 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
   arch/powerpc/mm/book3s64/hash_utils.c:1077:37: error: use of undeclared identifier 'kfence_early_init'; did you mean 'kasan_early_init'?
    1077 |             !(IS_ENABLED(CONFIG_KFENCE) && kfence_early_init)) {
         |                                            ^~~~~~~~~~~~~~~~~
         |                                            kasan_early_init
   arch/powerpc/include/asm/kasan.h:69:6: note: 'kasan_early_init' declared here
      69 | void kasan_early_init(void);
         |      ^
>> arch/powerpc/mm/book3s64/hash_utils.c:1077:37: warning: address of function 'kasan_early_init' will always evaluate to 'true' [-Wpointer-bool-conversion]
    1077 |             !(IS_ENABLED(CONFIG_KFENCE) && kfence_early_init)) {
         |                                         ~~ ^~~~~~~~~~~~~~~~~
   arch/powerpc/mm/book3s64/hash_utils.c:1077:37: note: prefix with the address-of operator to silence this warning
    1077 |             !(IS_ENABLED(CONFIG_KFENCE) && kfence_early_init)) {
         |                                            ^
         |                                            &
   6 warnings and 1 error generated.


vim +1077 arch/powerpc/mm/book3s64/hash_utils.c

  1070	
  1071	static void __init htab_init_page_sizes(void)
  1072	{
  1073		bool aligned = true;
  1074		init_hpte_page_sizes();
  1075	
  1076		if (!debug_pagealloc_enabled() &&
> 1077		    !(IS_ENABLED(CONFIG_KFENCE) && kfence_early_init)) {
  1078			/*
  1079			 * Pick a size for the linear mapping. Currently, we only
  1080			 * support 16M, 1M and 4K which is the default
  1081			 */
  1082			if (IS_ENABLED(CONFIG_STRICT_KERNEL_RWX) &&
  1083			    (unsigned long)_stext % 0x1000000) {
  1084				if (mmu_psize_defs[MMU_PAGE_16M].shift)
  1085					pr_warn("Kernel not 16M aligned, disabling 16M linear map alignment\n");
  1086				aligned = false;
  1087			}
  1088	
  1089			if (mmu_psize_defs[MMU_PAGE_16M].shift && aligned)
  1090				mmu_linear_psize = MMU_PAGE_16M;
  1091			else if (mmu_psize_defs[MMU_PAGE_1M].shift)
  1092				mmu_linear_psize = MMU_PAGE_1M;
  1093		}
  1094	

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