diff options
Diffstat (limited to 'kernel/locking/spinlock.c')
| -rw-r--r-- | kernel/locking/spinlock.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/locking/spinlock.c b/kernel/locking/spinlock.c index 936f3d14dd6b..0ff08380f531 100644 --- a/kernel/locking/spinlock.c +++ b/kernel/locking/spinlock.c @@ -22,6 +22,13 @@ #include <linux/debug_locks.h> #include <linux/export.h> +#ifdef CONFIG_MMIOWB +#ifndef arch_mmiowb_state +DEFINE_PER_CPU(struct mmiowb_state, __mmiowb_state); +EXPORT_PER_CPU_SYMBOL(__mmiowb_state); +#endif +#endif + /* * If lockdep is enabled then we use the non-preemption spin-ops * even on CONFIG_PREEMPT, because lockdep assumes that interrupts are |