sched: Mark boot-cpu active before smp_init()

commit 933b0618d8b2a59c7a0742e43836544e02f1e9bd upstream.

A UP machine has 1 active cpu, not having the boot-cpu in the
active map when starting the scheduler confuses things.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
LKML-Reference: <20091216170517.423469527@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Christoph Biedl <linux-kernel.bfrz@manchmal.in-ulm.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/init/main.c b/init/main.c
index 4051d75dd2d64e765b5d2856eac0da7fa796ef95..4be7de2a78b69fc92d184b46ed035ff32cce413d 100644 (file)
--- a/init/main.c
+++ b/init/main.c
@@ -369,12 +369,6 @@ static void __init smp_init(void)
 {
        unsigned int cpu;
 
-       /*
-        * Set up the current CPU as possible to migrate to.
-        * The other ones will be done by cpu_up/cpu_down()
-        */
-       set_cpu_active(smp_processor_id(), true);
-
        /* FIXME: This should be done in userspace --RR */
        for_each_present_cpu(cpu) {
                if (num_online_cpus() >= setup_max_cpus)
@@ -486,6 +480,7 @@ static void __init boot_cpu_init(void)
        int cpu = smp_processor_id();
        /* Mark the boot cpu "present", "online" etc for SMP and UP case */
        set_cpu_online(cpu, true);
+       set_cpu_active(cpu, true);
        set_cpu_present(cpu, true);
        set_cpu_possible(cpu, true);
 }