From dee4f42298bba030e84035aca5c114f9fee8fa6a Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Thu, 26 Apr 2018 15:30:28 -0700 Subject: [PATCH] rcu: Move rcu_gp_slow() to ->gp_seq This commit moves rcu_gp_slow() to ->gp_seq. This function only uses the grace-period number to modulate delay, so rcu_seq_ctr(rsp->gp_seq) gets the same effect, at least in cases where the delay is to happen more than four times per wrap of an unsigned long. Signed-off-by: Paul E. McKenney --- kernel/rcu/tree.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 467cd8e5c6ff..3c3af7e2758f 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -1879,7 +1879,8 @@ static void note_gp_changes(struct rcu_state *rsp, struct rcu_data *rdp) static void rcu_gp_slow(struct rcu_state *rsp, int delay) { if (delay > 0 && - !(rsp->gpnum % (rcu_num_nodes * PER_RCU_NODE_PERIOD * delay))) + !(rcu_seq_ctr(rsp->gp_seq) % + (rcu_num_nodes * PER_RCU_NODE_PERIOD * delay))) schedule_timeout_uninterruptible(delay); }