From f0e7c19db8798b4b991a2c71911e71f5dfdb348f Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Wed, 23 Nov 2011 15:02:05 -0800 Subject: [PATCH] rcu: Identify dyntick-idle CPUs on first force_quiescent_state() pass Fixes and workarounds for a number of issues (for example, that in df4012edc) make it safe to once again detect dyntick-idle CPUs on the first pass of force_quiescent_state(), so this commit makes that change. Signed-off-by: Paul E. McKenney Signed-off-by: Paul E. McKenney --- kernel/rcutree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/rcutree.c b/kernel/rcutree.c index aab9ed504b17..69bb37287cc8 100644 --- a/kernel/rcutree.c +++ b/kernel/rcutree.c @@ -607,7 +607,7 @@ int rcu_is_cpu_rrupt_from_idle(void) static int dyntick_save_progress_counter(struct rcu_data *rdp) { rdp->dynticks_snap = atomic_add_return(0, &rdp->dynticks->dynticks); - return 0; + return (rdp->dynticks_snap & 0x1) == 0; } /* -- 2.45.2