Commit-ID: e727c7d7a11e109849582e9165d54b254eb181d7 Gitweb: http://git.kernel.org/tip/e727c7d7a11e109849582e9165d54b254eb181d7 Author: Andy Lutomirski <[email protected]> AuthorDate: Fri, 3 Jul 2015 12:44:22 -0700 Committer: Ingo Molnar <[email protected]> CommitDate: Tue, 7 Jul 2015 10:59:04 +0200
notifiers, RCU: Assert that RCU is watching in notify_die() Low-level arch entries often call notify_die(), and it's easy for arch code to fail to exit an RCU quiescent state first. Assert that we're not quiescent in notify_die(). Signed-off-by: Andy Lutomirski <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Paul E. McKenney <[email protected]> Cc: Kees Cook <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Oleg Nesterov <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Rik van Riel <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/1f5fe6c23d5b432a23267102f2d72b787d80fdd8.1435952415.git.l...@kernel.org Signed-off-by: Ingo Molnar <[email protected]> --- kernel/notifier.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/notifier.c b/kernel/notifier.c index ae9fc7c..980e433 100644 --- a/kernel/notifier.c +++ b/kernel/notifier.c @@ -544,6 +544,8 @@ int notrace notify_die(enum die_val val, const char *str, .signr = sig, }; + rcu_lockdep_assert(rcu_is_watching(), + "notify_die called but RCU thinks we're quiescent"); return atomic_notifier_call_chain(&die_chain, val, &args); } NOKPROBE_SYMBOL(notify_die); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
