objtool reports the following warning: kernel/exit.o: warning: objtool: do_exit() falls through to next function complete_and_exit()
The warning is caused by do_exit()'s new call to do_task_dead(), which is a new "noreturn" function which objtool doesn't know about yet. (objtool has to know all the global noreturn functions so it can follow the control flow of any functions which call them. Unfortunately they need to be hard-coded becuase there's not an automated way to detect them.) Reported-by: kbuild test robot <fengguang...@intel.com> Signed-off-by: Josh Poimboeuf <jpoim...@redhat.com> --- tools/objtool/builtin-check.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/objtool/builtin-check.c b/tools/objtool/builtin-check.c index bd09d0e..143b6cd 100644 --- a/tools/objtool/builtin-check.c +++ b/tools/objtool/builtin-check.c @@ -175,6 +175,7 @@ static int __dead_end_function(struct objtool_file *file, struct symbol *func, "__stack_chk_fail", "panic", "do_exit", + "do_task_dead", "__module_put_and_exit", "complete_and_exit", "kvm_spurious_fault", -- 2.7.4