Merge branch 'linus' into core/rcu

Merge reason: Avoid fuzz in init/main.c and update from rc6 to rc8.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 3 insertions, 0 deletions

diff --git a/arch/x86/kernel/apic/ipi.c b/arch/x86/kernel/apic/ipi.c
index dbf5445727a9..6ef00ba4c886 100644
--- a/arch/x86/kernel/apic/ipi.c
+++ b/arch/x86/kernel/apic/ipi.c
@@ -106,6 +106,9 @@ void default_send_IPI_mask_logical(const struct cpumask *cpumask, int vector)
         unsigned long mask = cpumask_bits(cpumask)[0];
         unsigned long flags;
 
+        if (WARN_ONCE(!mask, "empty IPI mask"))
+                return;
+
         local_irq_save(flags);
         WARN_ON(mask & ~cpumask_bits(cpu_online_mask)[0]);
         __default_send_IPI_dest_field(mask, vector, apic->dest_logical);