dynamic-debug METADATA uses KBUILD_MODNAME as: #define DEFINE_DYNAMIC_DEBUG_METADATA_CLS(name, cls, fmt) \ static struct _ddebug __aligned(8) \ __section("__dyndbg") name = { \ .modname = KBUILD_MODNAME, \ This is going amiss for some builtins, ie those enabled here, by: echo module main +pmf > /proc/dynamic_debug_control grep =pmf /proc/dynamic_debug/control init/main.c:1187 [main]initcall_blacklist =pmf "blacklisting initcall %s\n" init/main.c:1226 [main]initcall_blacklisted =pmf "initcall %s blacklisted\n" init/main.c:1432 [main]run_init_process =pmf " with arguments:\n" init/main.c:1434 [main]run_init_process =pmf " %s\n" init/main.c:1435 [main]run_init_process =pmf " with environment:\n" init/main.c:1437 [main]run_init_process =pmf " %s\n" kernel/module/main.c:336 [main]find_symbol =pmf "Failed to find symbol %s\n" kernel/module/main.c:567 [main]already_uses =pmf "%s uses %s!\n" kernel/module/main.c:571 [main]already_uses =pmf "%s does not use %s!\n" kernel/module/main.c:586 [main]add_module_usage =pmf "Allocating new usage for %s.\n" kernel/module/main.c:627 [main]module_unload_free =pmf "%s unusing %s\n" kernel/module/main.c:733 [main]__do_sys_delete_module =pmf "%s already dying\n" kernel/module/main.c:1345 [main]simplify_symbols =pmf "Common symbol: %s\n" kernel/module/main.c:1353 [main]simplify_symbols =pmf "Absolute symbol: 0x%08lx\n" kernel/module/main.c:1508 [main]__layout_sections =pmf "\t%s\n" kernel/module/main.c:1526 [main]layout_sections =pmf "Core section allocation order:\n" kernel/module/main.c:1529 [main]layout_sections =pmf "Init section allocation order:\n" kernel/module/main.c:2168 [main]move_module =pmf "final section addresses:\n" kernel/module/main.c:2183 [main]move_module =pmf "\t0x%lx %s\n" kernel/module/main.c:2921 [main]__do_sys_init_module =pmf "init_module: umod=%p, len=%lu, uargs=%p\n" kernel/module/main.c:2942 [main]__do_sys_finit_module =pmf "finit_module: fd=%d, uargs=%p, flags=%i\n" drivers/base/power/main.c:135 [main]device_pm_add =pmf "Adding info for %s:%s\n" drivers/base/power/main.c:156 [main]device_pm_remove =pmf "Removing info for %s:%s\n" drivers/base/power/main.c:175 [main]device_pm_move_before =pmf "Moving %s:%s before %s:%s\n" drivers/base/power/main.c:189 [main]device_pm_move_after =pmf "Moving %s:%s after %s:%s\n" drivers/base/power/main.c:202 [main]device_pm_move_last =pmf "Moving %s:%s to end of list\n" drivers/base/power/main.c:441 [main]pm_dev_dbg =pmf "PM: %s%s%s driver flags: %x\n" drivers/base/power/main.c:467 [main]dpm_show_time =pmf "%s%s%s of devices %s after %ld.%03ld msecs\n" bash-5.2# Basically, KBUILD_MODNAME appears to get basename, not something specific, set in some config (such as pm, or module) or cleverly picked out of the path (power is possible) this compromises the clarity of dyndbg's module keyword is some heuristic possible to improve this, with a manual setting to fix when heuristic fails ?