Make sure that the processor is actually online or die spectacularly.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
index 2576291..798fce5 100644 (file)
--- a/arch/mips/kernel/smp.c
+++ b/arch/mips/kernel/smp.c
@@ -142,6 +142,11 @@ int smp_call_function (void (*func) (void *info), void *info, int retry,
        int i, cpus = num_online_cpus() - 1;
        int cpu = smp_processor_id();
 
+       /*
+        * Can die spectacularly if this CPU isn't yet marked online
+        */
+       BUG_ON(!cpu_online(cpu));
+
        if (!cpus)
                return 0;