From 9ff0c61d08ac4defa5ad6c65935a67643b8f4ce3 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Thu, 10 Feb 2011 11:57:27 +0000 Subject: [PATCH] powerpc: Mask smp_processor_id() false positive The rtas_event_scan() function uses smp_processor_id() to select a starting point in cpu_online_mask, and does so under the protection of get_online_cpus(). This might not select the current processor in any case, so switch to raw_smp_processor_id(). Signed-off-by: Paul E. McKenney Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/kernel/rtasd.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/rtasd.c b/arch/powerpc/kernel/rtasd.c index 049dbec..7980ec0 100644 --- a/arch/powerpc/kernel/rtasd.c +++ b/arch/powerpc/kernel/rtasd.c @@ -412,7 +412,8 @@ static void rtas_event_scan(struct work_struct *w) get_online_cpus(); - cpu = cpumask_next(smp_processor_id(), cpu_online_mask); + /* raw_ OK because just using CPU as starting point. */ + cpu = cpumask_next(raw_smp_processor_id(), cpu_online_mask); if (cpu >= nr_cpu_ids) { cpu = cpumask_first(cpu_online_mask); -- 2.7.4