x86: Don't send RESCHEDULE_VECTOR to offlined cpus
In the x86 native_smp_send_reschedule_function(), don't send the IPI if the
cpu has gone offline already. Warn nevertheless!!
Signed-off-by: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c
index 88c1e51..16c52aa 100644
--- a/arch/x86/kernel/smp.c
+++ b/arch/x86/kernel/smp.c
@@ -118,7 +118,10 @@
*/
static void native_smp_send_reschedule(int cpu)
{
- WARN_ON(cpu_is_offline(cpu));
+ if (unlikely(cpu_is_offline(cpu))) {
+ WARN_ON(1);
+ return;
+ }
send_IPI_mask(cpumask_of_cpu(cpu), RESCHEDULE_VECTOR);
}