patch-2_6_7-vs1_9_1_12

[linux-2.6.git] / arch / x86_64 / kernel / smp.c

diff --git a/arch/x86_64/kernel/smp.c b/arch/x86_64/kernel/smp.c
index 7ee5cea..fec7770 100644 (file)
--- a/arch/x86_64/kernel/smp.c
+++ b/arch/x86_64/kernel/smp.c
@@ -404,6 +404,9 @@ 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());
+
        data.func = func;
        data.info = info;
        atomic_set(&data.started, 0);