patch-2_6_7-vs1_9_1_12

[linux-2.6.git] / arch / um / kernel / smp.c

diff --git a/arch/um/kernel/smp.c b/arch/um/kernel/smp.c
index 34f826c..b815855 100644 (file)
--- a/arch/um/kernel/smp.c
+++ b/arch/um/kernel/smp.c
@@ -266,6 +266,9 @@ int smp_call_function(void (*_func)(void *info), void *_info, int nonatomic,
        if (!cpus)
                return 0;
 
+       /* Can deadlock when called with interrupts disabled */
+       WARN_ON(irqs_disabled());
+
        spin_lock_bh(&call_lock);
        atomic_set(&scf_started, 0);
        atomic_set(&scf_finished, 0);