Re: [PATCH] powerpc/mm: export symbols for lazy_mmu_mode KUnit tests

kernel test robot
2025-12-21T23:42:26Z

Hi Kevin,

kernel test robot noticed the following build warnings:

url: https://github.com/intel-lab-lkp/linux/commits/UPDATE-20251218-003955/Kevin-Brodsky/powerpc-64s-Do-not-re-activate-batched-TLB-flush/20251215-230757
base: the 14th patch of https://lore.kernel.org/r/20251215150323.2218608-15-kevin.brodsky%40arm.com
patch link: https://lore.kernel.org/r/20251217163812.2633648-1-kevin.brodsky%40arm.com
patch subject: [PATCH] powerpc/mm: export symbols for lazy_mmu_mode KUnit tests
config: powerpc-allmodconfig (https://download.01.org/0day-ci/archive/20251222/202512220735.UL4ukFLo-lkp@intel.com/config)
compiler: powerpc64-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251222/202512220735.UL4ukFLo-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/202512220735.UL4ukFLo-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> arch/powerpc/mm/book3s64/hash_tlb.c:33:1: warning: data definition has no type or storage class
33 | EXPORT_SYMBOL_IF_KUNIT(ppc64_tlb_batch); /* For lazy_mmu_mode KUnit tests */
| ^~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/mm/book3s64/hash_tlb.c:33:1: error: type defaults to 'int' in declaration of 'EXPORT_SYMBOL_IF_KUNIT' [-Wimplicit-int]
arch/powerpc/mm/book3s64/hash_tlb.c:33:1: error: parameter names (without types) in function declaration [-Wdeclaration-missing-parameter-type]
arch/powerpc/mm/book3s64/hash_tlb.c:158:1: warning: data definition has no type or storage class
158 | EXPORT_SYMBOL_IF_KUNIT(__flush_tlb_pending); /* For lazy_mmu_mode KUnit tests */
| ^~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/mm/book3s64/hash_tlb.c:158:1: error: type defaults to 'int' in declaration of 'EXPORT_SYMBOL_IF_KUNIT' [-Wimplicit-int]
arch/powerpc/mm/book3s64/hash_tlb.c:158:1: error: parameter names (without types) in function declaration [-Wdeclaration-missing-parameter-type]

vim +33 arch/powerpc/mm/book3s64/hash_tlb.c

31
32 DEFINE_PER_CPU(struct ppc64_tlb_batch, ppc64_tlb_batch);
> 33 EXPORT_SYMBOL_IF_KUNIT(ppc64_tlb_batch); /* For lazy_mmu_mode KUnit tests */
34

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