From: kernel test robot <lkp@intel.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev
Subject: [arnd-playground:randconfig-7.3-next 610/673] include/asm-generic/io.h:1099:9: error: call to undeclared function '__pa'; ISO C99 and later do not support implicit function declarations
Date: Fri, 25 Sep 2026 19:11:00 +0800 [thread overview]
Message-ID: <202609251944.whUSNQ5N-lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git randconfig-7.3-next
head: 0a1affa74ef2f2c5c5ee74fc604e47a1aefdd286
commit: d217cdb672619041e213243f6f352cb6422d3a59 [610/673] Revert "simplify asm/io.h"
config: um-allnoconfig (https://download.01.org/0day-ci/archive/20260925/202609251944.whUSNQ5N-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/20260925/202609251944.whUSNQ5N-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/202609251944.whUSNQ5N-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from lib/iomem_copy.c:8:
In file included from include/linux/io.h:12:
In file included from arch/um/include/asm/io.h:24:
>> include/asm-generic/io.h:1099:9: error: call to undeclared function '__pa'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1099 | return __pa((unsigned long)address);
| ^
>> include/asm-generic/io.h:1107:9: error: call to undeclared function '__va'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1107 | return __va(address);
| ^
>> include/asm-generic/io.h:1107:9: error: incompatible integer to pointer conversion returning 'int' from a function with result type 'void *' [-Wint-conversion]
1107 | return __va(address);
| ^~~~~~~~~~~~~
3 errors generated.
vim +/__pa +1099 include/asm-generic/io.h
5820acdc34867d Arnd Bergmann 2026-05-08 1090
5820acdc34867d Arnd Bergmann 2026-05-08 1091 /*
5820acdc34867d Arnd Bergmann 2026-05-08 1092 * Change virtual addresses to physical addresses and vv.
5820acdc34867d Arnd Bergmann 2026-05-08 1093 * These are pretty trivial
5820acdc34867d Arnd Bergmann 2026-05-08 1094 */
5820acdc34867d Arnd Bergmann 2026-05-08 1095 #ifndef virt_to_phys
5820acdc34867d Arnd Bergmann 2026-05-08 1096 #define virt_to_phys virt_to_phys
5820acdc34867d Arnd Bergmann 2026-05-08 1097 static inline unsigned long virt_to_phys(volatile void *address)
5820acdc34867d Arnd Bergmann 2026-05-08 1098 {
5820acdc34867d Arnd Bergmann 2026-05-08 @1099 return __pa((unsigned long)address);
5820acdc34867d Arnd Bergmann 2026-05-08 1100 }
5820acdc34867d Arnd Bergmann 2026-05-08 1101 #endif
5820acdc34867d Arnd Bergmann 2026-05-08 1102
5820acdc34867d Arnd Bergmann 2026-05-08 1103 #ifndef phys_to_virt
5820acdc34867d Arnd Bergmann 2026-05-08 1104 #define phys_to_virt phys_to_virt
5820acdc34867d Arnd Bergmann 2026-05-08 1105 static inline void *phys_to_virt(unsigned long address)
5820acdc34867d Arnd Bergmann 2026-05-08 1106 {
5820acdc34867d Arnd Bergmann 2026-05-08 @1107 return __va(address);
5820acdc34867d Arnd Bergmann 2026-05-08 1108 }
5820acdc34867d Arnd Bergmann 2026-05-08 1109 #endif
5820acdc34867d Arnd Bergmann 2026-05-08 1110
:::::: The code at line 1099 was first introduced by commit
:::::: 5820acdc34867db3abad330764e2069a3fb15216 Revert "asm/io.h: move virt_to_phys/phys_to_virt"
:::::: TO: Arnd Bergmann <arnd@arndb.de>
:::::: CC: Arnd Bergmann <arnd@arndb.de>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
reply other threads:[~2026-09-25 11:11 UTC|newest]
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