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authorJosh Poimboeuf <jpoimboe@redhat.com>2016-09-22 16:21:25 -0500
committerIngo Molnar <mingo@kernel.org>2016-09-23 07:28:05 +0200
commitc1fad9ef7ed14aad464972e6444e7a3bd5670f26 (patch)
tree5a61b598b9f2be92ff4e108fa156115d6ccbc734
parenta18a579e5f84daa74f64b1f1b652b4a6a8d6f8b4 (diff)
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objtool: Add do_task_dead() to global noreturn list
objtool reports the following new 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, introduced by: 9af6528ee9b6 ("sched/core: Optimize __schedule()") ( 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 because there's no automated way to detect them. ) Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: kbuild-all@01.org Cc: tipbuild@zytor.com Link: http://lkml.kernel.org/r/20160922212125.zbuewckqll4yur25@treble Signed-off-by: Ingo Molnar <mingo@kernel.org>
-rw-r--r--tools/objtool/builtin-check.c1
1 files changed, 1 insertions, 0 deletions
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",
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