From: Paul E. McKenney <paulmck@kernel.org>
Date: Fri, 10 Apr 2020 21:48:20 +0000 (-0700)
Subject: rcu: Convert ULONG_CMP_GE() to time_after() for jiffy comparison
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=29ffebc5fcc0bcd8e9bc9f9b3899f2d222b12b04;p=linux.git

rcu: Convert ULONG_CMP_GE() to time_after() for jiffy comparison

This commit converts the ULONG_CMP_GE() in rcu_gp_fqs_loop() to
time_after() to reflect the fact that it is comparing a timestamp to
the jiffies counter.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 940c62acd14ab..e5903669e336b 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -1700,7 +1700,7 @@ static void rcu_gp_fqs_loop(void)
 		    !rcu_preempt_blocked_readers_cgp(rnp))
 			break;
 		/* If time for quiescent-state forcing, do it. */
-		if (ULONG_CMP_GE(jiffies, rcu_state.jiffies_force_qs) ||
+		if (!time_after(rcu_state.jiffies_force_qs, jiffies) ||
 		    (gf & RCU_GP_FLAG_FQS)) {
 			trace_rcu_grace_period(rcu_state.name, rcu_state.gp_seq,
 					       TPS("fqsstart"));