Re: [PATCH v4] fs: hide names_cachep behind runtime access machinery

[kernel test robot <lkp@intel.com>]

Hi Mateusz,

kernel test robot noticed the following build errors:

[auto build test ERROR on arnd-asm-generic/master]
[also build test ERROR on linus/master brauner-vfs/vfs.all linux/master v6.18-rc3 next-20251031]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Mateusz-Guzik/fs-hide-names_cachep-behind-runtime-access-machinery/20251030-185523
base:   https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git master
patch link:    https://lore.kernel.org/r/20251030105242.801528-1-mjguzik%40gmail.com
patch subject: [PATCH v4] fs: hide names_cachep behind runtime access machinery
config: riscv-randconfig-002-20251031 (https://download.01.org/0day-ci/archive/20251031/202510312143.SvwwhqVp-lkp@intel.com/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251031/202510312143.SvwwhqVp-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/202510312143.SvwwhqVp-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from arch/riscv/kernel/asm-offsets.c:8:
   In file included from include/linux/mm.h:1016:
   In file included from include/linux/huge_mm.h:7:
   In file included from include/linux/fs.h:53:
   In file included from arch/riscv/include/asm/runtime-const.h:7:
>> arch/riscv/include/asm/cacheflush.h:49:6: error: call to undeclared function 'is_vmalloc_or_module_addr'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
      49 |         if (is_vmalloc_or_module_addr((void *)start)) {
         |             ^
   In file included from arch/riscv/kernel/asm-offsets.c:8:
   In file included from include/linux/mm.h:1016:
   In file included from include/linux/huge_mm.h:7:
   In file included from include/linux/fs.h:53:
   In file included from arch/riscv/include/asm/runtime-const.h:9:
   In file included from include/linux/memory.h:19:
   In file included from include/linux/node.h:18:
   In file included from include/linux/device.h:32:
   In file included from include/linux/device/driver.h:21:
   In file included from include/linux/module.h:20:
   In file included from include/linux/elf.h:6:
   In file included from arch/riscv/include/asm/elf.h:12:
   In file included from include/linux/compat.h:18:
   include/uapi/linux/aio_abi.h:79:2: error: unknown type name '__kernel_rwf_t'; did you mean '__kernel_off_t'?
      79 |         __kernel_rwf_t aio_rw_flags;    /* RWF_* flags */
         |         ^~~~~~~~~~~~~~
         |         __kernel_off_t
   include/uapi/asm-generic/posix_types.h:87:25: note: '__kernel_off_t' declared here
      87 | typedef __kernel_long_t __kernel_off_t;
         |                         ^
   2 errors generated.
   make[3]: *** [scripts/Makefile.build:182: arch/riscv/kernel/asm-offsets.s] Error 1 shuffle=1341192968
   make[3]: Target 'prepare' not remade because of errors.
   make[2]: *** [Makefile:1282: prepare0] Error 2 shuffle=1341192968
   make[2]: Target 'prepare' not remade because of errors.
   make[1]: *** [Makefile:248: __sub-make] Error 2 shuffle=1341192968
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:248: __sub-make] Error 2 shuffle=1341192968
   make: Target 'prepare' not remade because of errors.


vim +/is_vmalloc_or_module_addr +49 arch/riscv/include/asm/cacheflush.h

08f051eda33b51e Andrew Waterman 2017-10-25  42  
7e3811521dc3934 Alexandre Ghiti 2023-07-25  43  #ifdef CONFIG_64BIT
503638e0babf364 Alexandre Ghiti 2024-07-17  44  extern u64 new_vmalloc[NR_CPUS / sizeof(u64) + 1];
503638e0babf364 Alexandre Ghiti 2024-07-17  45  extern char _end[];
503638e0babf364 Alexandre Ghiti 2024-07-17  46  #define flush_cache_vmap flush_cache_vmap
503638e0babf364 Alexandre Ghiti 2024-07-17  47  static inline void flush_cache_vmap(unsigned long start, unsigned long end)
503638e0babf364 Alexandre Ghiti 2024-07-17  48  {
503638e0babf364 Alexandre Ghiti 2024-07-17 @49  	if (is_vmalloc_or_module_addr((void *)start)) {
503638e0babf364 Alexandre Ghiti 2024-07-17  50  		int i;
503638e0babf364 Alexandre Ghiti 2024-07-17  51  
503638e0babf364 Alexandre Ghiti 2024-07-17  52  		/*
503638e0babf364 Alexandre Ghiti 2024-07-17  53  		 * We don't care if concurrently a cpu resets this value since
503638e0babf364 Alexandre Ghiti 2024-07-17  54  		 * the only place this can happen is in handle_exception() where
503638e0babf364 Alexandre Ghiti 2024-07-17  55  		 * an sfence.vma is emitted.
503638e0babf364 Alexandre Ghiti 2024-07-17  56  		 */
503638e0babf364 Alexandre Ghiti 2024-07-17  57  		for (i = 0; i < ARRAY_SIZE(new_vmalloc); ++i)
503638e0babf364 Alexandre Ghiti 2024-07-17  58  			new_vmalloc[i] = -1ULL;
503638e0babf364 Alexandre Ghiti 2024-07-17  59  	}
503638e0babf364 Alexandre Ghiti 2024-07-17  60  }
7a92fc8b4d20680 Alexandre Ghiti 2023-12-12  61  #define flush_cache_vmap_early(start, end)	local_flush_tlb_kernel_range(start, end)
7e3811521dc3934 Alexandre Ghiti 2023-07-25  62  #endif
7e3811521dc3934 Alexandre Ghiti 2023-07-25  63  

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