Commit dee4f422 authored Apr 26, 2018 by Paul E. McKenney

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 <paulmck@linux.vnet.ibm.com>

parent de30ad51

kernel/rcu/tree.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -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);
		}