| From | Andy Lutomirski <> | Subject | [PATCH v5 05/17] notifiers: Assert that RCU is watching in notify_die | Date | Fri, 3 Jul 2015 12:44:22 -0700 |
| |
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 <luto@kernel.org> --- kernel/notifier.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/kernel/notifier.c b/kernel/notifier.c index ae9fc7cc360e..980e4330fb59 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); -- 2.4.3
|