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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2015-12-10 09:59:43 -0800
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2016-02-23 19:59:51 -0800
commit8994515cf0030e5020d67bb837a9d9a92441d0f7 (patch)
tree003966dcf9e6d1e07c1891624eea283a11d920d9 /kernel/rcu/tree.c
parentbb53e416e02cd5406d5e1dbdd89432ff5875e982 (diff)
downloadlinux-sh-8994515cf0030e5020d67bb837a9d9a92441d0f7.tar.gz
rcu: Update rcu_report_qs_rsp() comment
The header comment for rcu_report_qs_rsp() was obsolete, dating well before the advent of RCU grace-period kthreads. This commit therefore brings this comment back into alignment with current reality. Reported-by: Lihao Liang <lihao.liang@cs.ox.ac.uk> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu/tree.c')
-rw-r--r--kernel/rcu/tree.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index b8bbf3b27241..a91836868ade 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -2234,11 +2234,13 @@ static bool rcu_start_gp(struct rcu_state *rsp)
}
/*
- * Report a full set of quiescent states to the specified rcu_state
- * data structure. This involves cleaning up after the prior grace
- * period and letting rcu_start_gp() start up the next grace period
- * if one is needed. Note that the caller must hold rnp->lock, which
- * is released before return.
+ * Report a full set of quiescent states to the specified rcu_state data
+ * structure. Invoke rcu_gp_kthread_wake() to awaken the grace-period
+ * kthread if another grace period is required. Whether we wake
+ * the grace-period kthread or it awakens itself for the next round
+ * of quiescent-state forcing, that kthread will clean up after the
+ * just-completed grace period. Note that the caller must hold rnp->lock,
+ * which is released before return.
*/
static void rcu_report_qs_rsp(struct rcu_state *rsp, unsigned long flags)
__releases(rcu_get_root(rsp)->lock)