From: Paul E. McKenney Date: Wed, 2 May 2018 20:51:57 +0000 (-0700) Subject: rcu: Fix an obsolete ->qsmaskinit comment X-Git-Tag: v4.19-rc1~214^2^2~47 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=c50cbe535c972150c2caf923239ef77e85c5ad60;p=linux.git rcu: Fix an obsolete ->qsmaskinit comment Back in the old days, when grace-period initialization blocked CPU hotplug, the ->qsmaskinit mask was indeed updated at the time that a given CPU went offline. However, with the deferral of these updates until the beginning of the next grace period in commit 0aa04b055e71 ("rcu: Process offlining and onlining only at grace-period start"), it is instead ->qsmaskinitnext that gets updated at that time. This commit therefore updates the obsolete comment. It also fixes punctuation while on the topic of comments mentioning ->qsmaskinit. Signed-off-by: Paul E. McKenney --- diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 9a5ba6db7b60..05f69b787a57 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -2438,7 +2438,7 @@ static void rcu_cleanup_dying_cpu(struct rcu_state *rsp) * This function therefore goes up the tree of rcu_node structures, * clearing the corresponding bits in the ->qsmaskinit fields. Note that * the leaf rcu_node structure's ->qsmaskinit field has already been - * updated + * updated. * * This function does check that the specified rcu_node structure has * all CPUs offline and no blocked tasks, so it is OK to invoke it @@ -3709,7 +3709,7 @@ void rcu_cpu_starting(unsigned int cpu) #ifdef CONFIG_HOTPLUG_CPU /* * The CPU is exiting the idle loop into the arch_cpu_idle_dead() - * function. We now remove it from the rcu_node tree's ->qsmaskinit + * function. We now remove it from the rcu_node tree's ->qsmaskinitnext * bit masks. */ static void rcu_cleanup_dying_idle_cpu(int cpu, struct rcu_state *rsp)