From 1bb5f9b95afe5d9d6b586389ce5e8f461a5b671c Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Fri, 12 Apr 2019 12:34:41 -0700 Subject: rcu/nocb: Use separate flag to indicate disabled ->cblist NULLing the RCU_NEXT_TAIL pointer was a clever way to save a byte, but forward-progress considerations would require that this pointer be both NULL and non-NULL, which, absent a quantum-computer port of the Linux kernel, simply won't happen. This commit therefore creates as separate ->enabled flag to replace the current NULL checks. [ paulmck: Add include files per 0day test robot and -next. ] Signed-off-by: Paul E. McKenney --- kernel/rcu/rcu_segcblist.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel/rcu/rcu_segcblist.h') diff --git a/kernel/rcu/rcu_segcblist.h b/kernel/rcu/rcu_segcblist.h index 822a39da0533..b2de7b32da29 100644 --- a/kernel/rcu/rcu_segcblist.h +++ b/kernel/rcu/rcu_segcblist.h @@ -63,7 +63,7 @@ static inline long rcu_segcblist_n_nonlazy_cbs(struct rcu_segcblist *rsclp) */ static inline bool rcu_segcblist_is_enabled(struct rcu_segcblist *rsclp) { - return !!rsclp->tails[RCU_NEXT_TAIL]; + return rsclp->enabled; } /* -- cgit v1.2.3