Trouble with __UNIQUE_ID Im getting an error which "shouldnt be possible", but is happening anyway. On Mon, Jun 12, 2023 at 2:55 PM kernel test robot <lkp@xxxxxxxxx> wrote: > > tree/branch: https://github.com/jimc/linux.git dd-fix-2g > branch HEAD: 664531695395972a1684dbc3604731db280b479e drm-drivers: DRM_CLASSMAP_USE in 2nd batch of drivers, helpers > > Error/Warning: (recently discovered and may have been fixed) > > hppa-linux-ld: drivers/gpu/drm/nouveau/nouveau_drm.o:(__dyndbg_class_users+0x0): multiple definition of `__UNIQUE_ID_ddebug_class_user323'; drivers/gpu/drm/radeon/radeon_drv.o:(__dyndbg_class_users+0x0): first defined here > include/drm/drm_print.h:421:9: error: implicit declaration of function '_dynamic_func_call_cls' [-Werror=implicit-function-declaration] > riscv64-linux-ld: drivers/gpu/drm/gud/gud_drv.o:(__dyndbg_class_users+0x0): multiple definition of `__UNIQUE_ID_ddebug_class_user305'; drivers/gpu/drm/qxl/qxl_drv.o:(__dyndbg_class_users+0x0): first defined here > riscv64-linux-ld: drivers/gpu/drm/nouveau/nouveau_drm.o:(__dyndbg_class_users+0x0): multiple definition of `__UNIQUE_ID_ddebug_class_user374'; drivers/gpu/drm/radeon/radeon_drv.o:(__dyndbg_class_users+0x0): first defined here > > Error/Warning ids grouped by kconfigs: > > gcc_recent_errors > |-- parisc-allyesconfig > | `-- multiple-definition-of-__UNIQUE_ID_ddebug_class_user323-drivers-gpu-drm-radeon-radeon_drv.o:(__dyndbg_class_users):first-defined-here > |-- riscv-allyesconfig > | |-- multiple-definition-of-__UNIQUE_ID_ddebug_class_user305-drivers-gpu-drm-qxl-qxl_drv.o:(__dyndbg_class_users):first-defined-here > | `-- multiple-definition-of-__UNIQUE_ID_ddebug_class_user374-drivers-gpu-drm-radeon-radeon_drv.o:(__dyndbg_class_users):first-defined-here > `-- x86_64-randconfig-a015-20230612 > `-- include-drm-drm_print.h:error:implicit-declaration-of-function-_dynamic_func_call_cls > > elapsed time: 756m > > configs tested: 101 > configs skipped: 6 > > tested configs: > alpha allyesconfig gcc > alpha defconfig gcc > alpha randconfig-r022-20230612 gcc > arc allyesconfig gcc > arc defconfig gcc > arc randconfig-r015-20230612 gcc > arc randconfig-r043-20230612 gcc > arm allmodconfig gcc > arm allyesconfig gcc > arm defconfig gcc > arm randconfig-r046-20230612 clang > arm64 allyesconfig gcc > arm64 defconfig gcc > csky defconfig gcc > hexagon randconfig-r041-20230612 clang > hexagon randconfig-r045-20230612 clang > i386 allyesconfig gcc > i386 buildonly-randconfig-r006-20230612 clang > i386 debian-10.3 gcc > i386 defconfig gcc > i386 randconfig-i001-20230612 clang > i386 randconfig-i002-20230612 clang > i386 randconfig-i003-20230612 clang > i386 randconfig-i004-20230612 clang > i386 randconfig-i005-20230612 clang > i386 randconfig-i006-20230612 clang > i386 randconfig-i011-20230612 gcc > i386 randconfig-i012-20230612 gcc > i386 randconfig-i013-20230612 gcc > i386 randconfig-i014-20230612 gcc > i386 randconfig-i015-20230612 gcc > i386 randconfig-i016-20230612 gcc > i386 randconfig-r012-20230612 gcc > i386 randconfig-r014-20230612 gcc > i386 randconfig-r035-20230612 clang > loongarch allmodconfig gcc > loongarch allnoconfig gcc > loongarch buildonly-randconfig-r001-20230612 gcc > loongarch defconfig gcc > m68k allmodconfig gcc > m68k allyesconfig gcc > m68k buildonly-randconfig-r004-20230612 gcc > m68k defconfig gcc > mips allmodconfig gcc > mips allyesconfig gcc > mips randconfig-r001-20230612 gcc > mips randconfig-r011-20230612 clang > mips randconfig-r021-20230612 clang > nios2 defconfig gcc > nios2 randconfig-r032-20230612 gcc > openrisc randconfig-r013-20230612 gcc > openrisc randconfig-r024-20230612 gcc > parisc allyesconfig gcc > parisc defconfig gcc > parisc randconfig-r004-20230612 gcc > parisc64 defconfig gcc > powerpc allmodconfig gcc > powerpc allnoconfig gcc > powerpc buildonly-randconfig-r003-20230612 gcc > powerpc buildonly-randconfig-r005-20230612 gcc > riscv allmodconfig gcc > riscv allnoconfig gcc > riscv allyesconfig gcc > riscv defconfig gcc > riscv randconfig-r003-20230612 clang > riscv randconfig-r042-20230612 gcc > riscv rv32_defconfig gcc > s390 allmodconfig gcc > s390 allyesconfig gcc > s390 defconfig gcc > s390 randconfig-r016-20230612 gcc > s390 randconfig-r025-20230612 gcc > s390 randconfig-r033-20230612 clang > s390 randconfig-r044-20230612 gcc > sh allmodconfig gcc > sh randconfig-r002-20230612 gcc > sh randconfig-r031-20230612 gcc > sh randconfig-r036-20230612 gcc > sparc allyesconfig gcc > sparc defconfig gcc > um i386_defconfig gcc > um x86_64_defconfig gcc > x86_64 allyesconfig gcc > x86_64 buildonly-randconfig-r002-20230612 clang > x86_64 defconfig gcc > x86_64 kexec gcc > x86_64 randconfig-a001-20230612 clang > x86_64 randconfig-a002-20230612 clang > x86_64 randconfig-a003-20230612 clang > x86_64 randconfig-a004-20230612 clang > x86_64 randconfig-a005-20230612 clang > x86_64 randconfig-a006-20230612 clang > x86_64 randconfig-a011-20230612 gcc > x86_64 randconfig-a012-20230612 gcc > x86_64 randconfig-a013-20230612 gcc > x86_64 randconfig-a014-20230612 gcc > x86_64 randconfig-a015-20230612 gcc > x86_64 randconfig-a016-20230612 gcc > x86_64 randconfig-r005-20230612 clang > x86_64 rhel-8.3-rust clang > x86_64 rhel-8.3 gcc > > -- > 0-DAY CI Kernel Test Service > https://github.com/intel/lkp-tests/wiki the source of the error is this: /** * DYNDBG_CLASSMAP_USE - refer to a classmap, DEFINEd elsewhere. * @_var: name of the exported classmap var * * This registers a module's use of another module's classmap defn, so * dyndbg can authorize "class DRM_CORE ..." >control commands upon * this module. */ #define DYNDBG_CLASSMAP_USE(_var) \ DYNDBG_CLASSMAP_USE_(_var, __UNIQUE_ID(ddebug_class_user)) #define DYNDBG_CLASSMAP_USE_(_var, _uname) \ extern struct ddebug_class_map _var; \ struct ddebug_class_user __used \ __section("__dyndbg_class_users") _uname = { \ .user_mod_name = KBUILD_MODNAME, \ .map = &_var, \ } I have reproduced this locally, with various errors, depending upon config and make.cross args heres one example: AR vmlinux.a LD vmlinux.o ld: ld: DWARF error: could not find abbrev number 7629 drivers/gpu/drm/gud/gud_drv.o:(__dyndbg_class_users+0x0): multiple definition of `__UNIQUE_ID_ddebug_class_user303'; ld: DWARF error: could not find abbrev number 94 drivers/gpu/drm/qxl/qxl_drv.o:(__dyndbg_class_users+0x0): first defined here make[1]: *** [/home/jimc/projects/lx/wk-suren/scripts/Makefile.vmlinux_o:61: vmlinux.o] Error 1 make: *** [/home/jimc/projects/lx/wk-suren/Makefile:1231: vmlinux_o] Error 2 [jimc@frodo rand-046-clang]$ grep -E 'QXL|GUD' .config CONFIG_DRM_QXL=y CONFIG_DRM_GUD=y searching that error gives results suggesting an LTO linker error, but some of the hits are quite old. note- despite the path, this is not a clang error - I get a different message (but still an error) when using make.cross COMPILER=clang is there something subtle (or obvious) wrong with my macro ? _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
