ARM: smp: Drop RCU_NONIDLE usage in cpu_die()

Before f7b861b7a6d9 ("arm: Use generic idle loop") ARM would kill the
CPU within the rcu idle section.  Now that the rcu_idle_enter()/exit()
pair have been pushed lower down in the idle loop this is no longer true
and so using RCU_NONIDLE here is no longer necessary and also harmful
because RCU is not actually idle at this point.

Cc: Russell King <linux@arm.linux.org.uk>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 47ab905..550d63c 100644 (file)
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -251,7 +251,7 @@ void __ref cpu_die(void)
         * this returns, power and/or clocks can be removed at any point
         * from this CPU and its cache by platform_cpu_kill().
         */
-       RCU_NONIDLE(complete(&cpu_died));
+       complete(&cpu_died);
 
        /*
         * Ensure that the cache lines associated with that completion are