diff options
Diffstat (limited to 'arch/i386/kernel/smp.c')
| -rw-r--r-- | arch/i386/kernel/smp.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/i386/kernel/smp.c b/arch/i386/kernel/smp.c index 31e5c6573aa..9827cf927ec 100644 --- a/arch/i386/kernel/smp.c +++ b/arch/i386/kernel/smp.c @@ -699,6 +699,10 @@ int smp_call_function_single(int cpu, void (*func) (void *info), void *info, put_cpu(); return -EBUSY; } + + /* Can deadlock when called with interrupts disabled */ + WARN_ON(irqs_disabled()); + spin_lock_bh(&call_lock); __smp_call_function_single(cpu, func, info, nonatomic, wait); spin_unlock_bh(&call_lock); |