tree: https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git for-next head: 6abcbcab29996eba5d4bc5df20ed0bb4800effa9 commit: d7bebcb4a898bd214bbd71107f975b7b9f0bde32 [68/91] s390: Optimize __pa/__va when RANDOMIZE_IDENTITY_BASE is off config: s390-randconfig-001-20250127 (https://download.01.org/0day-ci/archive/20250127/202501270309.HzsVNo3o-lkp@xxxxxxxxx/config) compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 19306351a2c45e266fa11b41eb1362b20b6ca56d) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250127/202501270309.HzsVNo3o-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202501270309.HzsVNo3o-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from arch/s390/mm/vmem.c:7: In file included from include/linux/memblock.h:12: In file included from include/linux/mm.h:2223: include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 518 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ >> arch/s390/mm/vmem.c:665:36: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 665 | __set_memory_4k(__va(0), __va(0) + ident_map_size); | ~~~~~~~ ^ 2 warnings generated. vim +665 arch/s390/mm/vmem.c 4df29d2b9024d6 Alexander Gordeev 2022-07-20 651 f4eb07c17df2e6 Heiko Carstens 2006-12-08 652 void __init vmem_map_init(void) f4eb07c17df2e6 Heiko Carstens 2006-12-08 653 { a7eb28801b692d Heiko Carstens 2023-08-25 654 __set_memory_rox(_stext, _etext); a7eb28801b692d Heiko Carstens 2023-08-25 655 __set_memory_ro(_etext, __end_rodata); a7eb28801b692d Heiko Carstens 2023-08-25 656 __set_memory_rox(__stext_amode31, __etext_amode31); a6e49f10f4411e Heiko Carstens 2023-08-25 657 /* a6e49f10f4411e Heiko Carstens 2023-08-25 658 * If the BEAR-enhancement facility is not installed the first a6e49f10f4411e Heiko Carstens 2023-08-25 659 * prefix page is used to return to the previous context with a6e49f10f4411e Heiko Carstens 2023-08-25 660 * an LPSWE instruction and therefore must be executable. a6e49f10f4411e Heiko Carstens 2023-08-25 661 */ c0f1d478121131 Heiko Carstens 2023-08-25 662 if (!static_key_enabled(&cpu_has_bear)) c0f1d478121131 Heiko Carstens 2023-08-25 663 set_memory_x(0, 1); 1e72ba5566d90a Heiko Carstens 2024-07-29 664 if (debug_pagealloc_enabled()) 1e72ba5566d90a Heiko Carstens 2024-07-29 @665 __set_memory_4k(__va(0), __va(0) + ident_map_size); :::::: The code at line 665 was first introduced by commit :::::: 1e72ba5566d90a668c1c0fbde319cec03454fd20 s390/mm: Get rid of RELOC_HIDE() :::::: TO: Heiko Carstens <hca@xxxxxxxxxxxxx> :::::: CC: Vasily Gorbik <gor@xxxxxxxxxxxxx> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
