[arm-integrator:nested_lazy_mmu 2/7] arch/powerpc/include/asm/book3s/64/tlbflush-hash.h:35:17: error: 'return' with no value, in function returning non-void

[arm-integrator:nested_lazy_mmu 2/7] arch/powerpc/include/asm/book3s/64/tlbflush-hash.h:35:17: error: 'return' with no value, in function returning non-void

[kernel test robot]

[community] /zdci/src/lkp/sbin/sync-produce --item /zdci/kbuild/indicators/6b/6bd8375a897e4aee7a5cb7a9583f3d365fe9c3de-first_error_kconfig --flag create-dir

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator.git nested_lazy_mmu
head:   95673e91d66295c538fe848aa7ce00753f02b2e1
commit: 6bd8375a897e4aee7a5cb7a9583f3d365fe9c3de [2/7] mm: introduce local state for lazy_mmu sections
config: powerpc64-randconfig-001-20250904 (https://download.01.org/0day-ci/archive/20250904/202509040307.50Z30uOL-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/20250904/202509040307.50Z30uOL-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/202509040307.50Z30uOL-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from arch/powerpc/include/asm/book3s/64/tlbflush.h:9,
                    from arch/powerpc/include/asm/book3s/tlbflush.h:6,
                    from arch/powerpc/include/asm/tlbflush.h:6,
                    from arch/powerpc/include/asm/pgtable.h:11,
                    from include/linux/pgtable.h:6,
                    from arch/powerpc/include/asm/kup.h:43,
                    from arch/powerpc/include/asm/uaccess.h:8,
                    from include/linux/uaccess.h:12,
                    from include/linux/sched/task.h:13,
                    from include/linux/sched/signal.h:9,
                    from include/linux/rcuwait.h:6,
                    from include/linux/percpu-rwsem.h:7,
                    from include/linux/fs.h:34,
                    from include/linux/compat.h:17,
                    from arch/powerpc/kernel/asm-offsets.c:12:
   arch/powerpc/include/asm/book3s/64/tlbflush-hash.h: In function 'arch_enter_lazy_mmu_mode':
>> arch/powerpc/include/asm/book3s/64/tlbflush-hash.h:35:17: error: 'return' with no value, in function returning non-void [-Wreturn-mismatch]
      35 |                 return;
         |                 ^~~~~~
   arch/powerpc/include/asm/book3s/64/tlbflush-hash.h:30:32: note: declared here
      30 | static inline lazy_mmu_state_t arch_enter_lazy_mmu_mode(void)
         |                                ^~~~~~~~~~~~~~~~~~~~~~~~
   make[3]: *** [scripts/Makefile.build:182: arch/powerpc/kernel/asm-offsets.s] Error 1 shuffle=3253080104
   make[3]: Target 'prepare' not remade because of errors.
   make[2]: *** [Makefile:1282: prepare0] Error 2 shuffle=3253080104
   make[2]: Target 'prepare' not remade because of errors.
   make[1]: *** [Makefile:248: __sub-make] Error 2 shuffle=3253080104
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:248: __sub-make] Error 2 shuffle=3253080104
   make: Target 'prepare' not remade because of errors.


vim +/return +35 arch/powerpc/include/asm/book3s/64/tlbflush-hash.h

ee3b93ebfbed62 Aneesh Kumar K.V 2016-03-01  29  
6bd8375a897e4a Kevin Brodsky    2025-07-31  30  static inline lazy_mmu_state_t arch_enter_lazy_mmu_mode(void)
ee3b93ebfbed62 Aneesh Kumar K.V 2016-03-01  31  {
1a472c9dba6b96 Aneesh Kumar K.V 2016-04-29  32  	struct ppc64_tlb_batch *batch;
ee3b93ebfbed62 Aneesh Kumar K.V 2016-03-01  33  
1a472c9dba6b96 Aneesh Kumar K.V 2016-04-29  34  	if (radix_enabled())
1a472c9dba6b96 Aneesh Kumar K.V 2016-04-29 @35  		return;
b9ef323ea1682f Nicholas Piggin  2022-10-14  36  	/*
b9ef323ea1682f Nicholas Piggin  2022-10-14  37  	 * apply_to_page_range can call us this preempt enabled when
b9ef323ea1682f Nicholas Piggin  2022-10-14  38  	 * operating on kernel page tables.
b9ef323ea1682f Nicholas Piggin  2022-10-14  39  	 */
b9ef323ea1682f Nicholas Piggin  2022-10-14  40  	preempt_disable();
1a472c9dba6b96 Aneesh Kumar K.V 2016-04-29  41  	batch = this_cpu_ptr(&ppc64_tlb_batch);
ee3b93ebfbed62 Aneesh Kumar K.V 2016-03-01  42  	batch->active = 1;
6bd8375a897e4a Kevin Brodsky    2025-07-31  43  
6bd8375a897e4a Kevin Brodsky    2025-07-31  44  	return LAZY_MMU_DEFAULT;
ee3b93ebfbed62 Aneesh Kumar K.V 2016-03-01  45  }
ee3b93ebfbed62 Aneesh Kumar K.V 2016-03-01  46  

:::::: The code at line 35 was first introduced by commit
:::::: 1a472c9dba6b9646fd36717968f6a531b4441c7d powerpc/mm/radix: Add tlbflush routines

:::::: TO: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
:::::: CC: Michael Ellerman <mpe@ellerman.id.au>

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