MIPS: CPU#0 is not hotpluggable

commit 9cce844abf07b683cff5f0273977d5f8d0af94c7 upstream.

Now CPU#0 is not hotpluggable on MIPS, so prevent to create /sys/devices
/system/cpu/cpu0/online which confuses some user-space tools.

Cc: stable@vger.kernel.org
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/mips/kernel/topology.c b/arch/mips/kernel/topology.c
index cd3e1f82e1a5df356e41990652712466d6e147d0..08ad6371fbe087b2c174613c1a8f0eb19824dff7 100644 (file)
--- a/arch/mips/kernel/topology.c
+++ b/arch/mips/kernel/topology.c
@@ -20,7 +20,7 @@ static int __init topology_init(void)
        for_each_present_cpu(i) {
                struct cpu *c = &per_cpu(cpu_devices, i);
 
-               c->hotpluggable = 1;
+               c->hotpluggable = !!i;
                ret = register_cpu(c, i);
                if (ret)
                        printk(KERN_WARNING "topology_init: register_cpu %d "