Commit 45c7c676 authored by Feng Lee's avatar Feng Lee Committed by Uladzislau Rezki (Sony)
Browse files

srcu: Remove redundant GP sequence checks in srcu_funnel_gp_start 



We will perform GP sequence checking at the beginning of srcu_gp_start,
thus making it safe to remove duplicate GP sequence checks prior to
calling srcu_gp_start.

Signed-off-by: default avatarFeng Lee <379943137@qq.com>
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
Signed-off-by: default avatarUladzislau Rezki (Sony) <urezki@gmail.com>
parent cfb07b07

kernel/rcu/srcutree.c

+0 −1
Original line number Diff line number Diff line
@@ -1077,7 +1077,6 @@ static void srcu_funnel_gp_start(struct srcu_struct *ssp, struct srcu_data *sdp, 
	/* If grace period not already in progress, start it. */

	if (!WARN_ON_ONCE(rcu_seq_done(&sup->srcu_gp_seq, s)) &&

	    rcu_seq_state(sup->srcu_gp_seq) == SRCU_STATE_IDLE) {

		WARN_ON_ONCE(ULONG_CMP_GE(sup->srcu_gp_seq, sup->srcu_gp_seq_needed));

		srcu_gp_start(ssp);



		// And how can that list_add() in the "else" clause