Re: [PATCH v2 11/14] mm: Remove devmap related functions and page table bits

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

Hi Alistair,

kernel test robot noticed the following build errors:

[auto build test ERROR on f97971f859dd7d22e63982a493aec85d9e75a69e]

url:    https://github.com/intel-lab-lkp/linux/commits/Alistair-Popple/mm-Convert-pXd_devmap-checks-to-vma_is_dax/20250616-200157
base:   f97971f859dd7d22e63982a493aec85d9e75a69e
patch link:    https://lore.kernel.org/r/bf6221bf1e3a290845417a60c27cf301203fd99c.1750075065.git-series.apopple%40nvidia.com
patch subject: [PATCH v2 11/14] mm: Remove devmap related functions and page table bits
config: riscv-allmodconfig (https://download.01.org/0day-ci/archive/20250617/202506171710.jhTZDsZ3-lkp@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project f819f46284f2a79790038e1f6649172789734ae8)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250617/202506171710.jhTZDsZ3-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/202506171710.jhTZDsZ3-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:31:
   In file included from include/linux/pgtable.h:6:
>> arch/riscv/include/asm/pgtable.h:934:17: error: call to undeclared function 'pte_mkdevmap'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     934 |         return pte_pud(pte_mkdevmap(pud_pte(pud)));
         |                        ^
   arch/riscv/include/asm/pgtable.h:934:17: note: did you mean 'pud_mkdevmap'?
   arch/riscv/include/asm/pgtable.h:932:21: note: 'pud_mkdevmap' declared here
     932 | static inline pud_t pud_mkdevmap(pud_t pud)
         |                     ^
     933 | {
     934 |         return pte_pud(pte_mkdevmap(pud_pte(pud)));
         |                        ~~~~~~~~~~~~
         |                        pud_mkdevmap
>> arch/riscv/include/asm/pgtable.h:934:17: error: passing 'int' to parameter of incompatible type 'pte_t'
     934 |         return pte_pud(pte_mkdevmap(pud_pte(pud)));
         |                        ^~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/include/asm/pgtable.h:675:35: note: passing argument to parameter 'pte' here
     675 | static inline pud_t pte_pud(pte_t pte)
         |                                   ^
   In file included from arch/riscv/kernel/asm-offsets.c:8:
   In file included from include/linux/mm.h:36:
   In file included from include/linux/rcuwait.h:6:
   In file included from include/linux/sched/signal.h:6:
   include/linux/signal.h:98:11: warning: array index 3 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
      98 |                 return (set->sig[3] | set->sig[2] |
         |                         ^        ~
   include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
      62 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from arch/riscv/kernel/asm-offsets.c:8:
   In file included from include/linux/mm.h:36:
   In file included from include/linux/rcuwait.h:6:
   In file included from include/linux/sched/signal.h:6:
   include/linux/signal.h:98:25: warning: array index 2 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
      98 |                 return (set->sig[3] | set->sig[2] |
         |                                       ^        ~
   include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
      62 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from arch/riscv/kernel/asm-offsets.c:8:
   In file included from include/linux/mm.h:36:
   In file included from include/linux/rcuwait.h:6:
   In file included from include/linux/sched/signal.h:6:
   include/linux/signal.h:99:4: warning: array index 1 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
      99 |                         set->sig[1] | set->sig[0]) == 0;
         |                         ^        ~
   include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
      62 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from arch/riscv/kernel/asm-offsets.c:8:
   In file included from include/linux/mm.h:36:
   In file included from include/linux/rcuwait.h:6:
   In file included from include/linux/sched/signal.h:6:
   include/linux/signal.h:101:11: warning: array index 1 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
     101 |                 return (set->sig[1] | set->sig[0]) == 0;
         |                         ^        ~
   include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
      62 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from arch/riscv/kernel/asm-offsets.c:8:
   In file included from include/linux/mm.h:36:
   In file included from include/linux/rcuwait.h:6:
   In file included from include/linux/sched/signal.h:6:
   include/linux/signal.h:114:11: warning: array index 3 is past the end of the array (that has type 'const unsigned long[1]') [-Warray-bounds]
     114 |                 return  (set1->sig[3] == set2->sig[3]) &&
         |                          ^         ~
   include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
      62 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from arch/riscv/kernel/asm-offsets.c:8:
   In file included from include/linux/mm.h:36:
   In file included from include/linux/rcuwait.h:6:
   In file included from include/linux/sched/signal.h:6:
   include/linux/signal.h:114:27: warning: array index 3 is past the end of the array (that has type 'const unsigned long[1]') [-Warray-bounds]
     114 |                 return  (set1->sig[3] == set2->sig[3]) &&
         |                                          ^         ~
   include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
      62 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from arch/riscv/kernel/asm-offsets.c:8:
   In file included from include/linux/mm.h:36:
   In file included from include/linux/rcuwait.h:6:
   In file included from include/linux/sched/signal.h:6:
   include/linux/signal.h:115:5: warning: array index 2 is past the end of the array (that has type 'const unsigned long[1]') [-Warray-bounds]
     115 |                         (set1->sig[2] == set2->sig[2]) &&
         |                          ^         ~
   include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
      62 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from arch/riscv/kernel/asm-offsets.c:8:
   In file included from include/linux/mm.h:36:
   In file included from include/linux/rcuwait.h:6:
   In file included from include/linux/sched/signal.h:6:
   include/linux/signal.h:115:21: warning: array index 2 is past the end of the array (that has type 'const unsigned long[1]') [-Warray-bounds]
     115 |                         (set1->sig[2] == set2->sig[2]) &&
         |                                          ^         ~
   include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
      62 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from arch/riscv/kernel/asm-offsets.c:8:
   In file included from include/linux/mm.h:36:
   In file included from include/linux/rcuwait.h:6:
   In file included from include/linux/sched/signal.h:6:
   include/linux/signal.h:116:5: warning: array index 1 is past the end of the array (that has type 'const unsigned long[1]') [-Warray-bounds]
     116 |                         (set1->sig[1] == set2->sig[1]) &&
         |                          ^         ~
   include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
      62 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from arch/riscv/kernel/asm-offsets.c:8:
   In file included from include/linux/mm.h:36:
   In file included from include/linux/rcuwait.h:6:
   In file included from include/linux/sched/signal.h:6:
   include/linux/signal.h:116:21: warning: array index 1 is past the end of the array (that has type 'const unsigned long[1]') [-Warray-bounds]


vim +/pte_mkdevmap +934 arch/riscv/include/asm/pgtable.h

c3cc2a4a3a23fa Alexandre Ghiti 2025-03-21  931  
c3cc2a4a3a23fa Alexandre Ghiti 2025-03-21  932  static inline pud_t pud_mkdevmap(pud_t pud)
c3cc2a4a3a23fa Alexandre Ghiti 2025-03-21  933  {
c3cc2a4a3a23fa Alexandre Ghiti 2025-03-21 @934  	return pte_pud(pte_mkdevmap(pud_pte(pud)));
c3cc2a4a3a23fa Alexandre Ghiti 2025-03-21  935  }
c3cc2a4a3a23fa Alexandre Ghiti 2025-03-21  936  

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