Define spin_barrier_irq() for IRQ-safe spinlocks, and use it for virq_lock.

Signed-off-by: Keir Fraser <keir.fraser@citrix.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/xen/include/xen/spinlock.h b/xen/include/xen/spinlock.h
index 289018fea0..c49be63c5f 100644
--- a/xen/include/xen/spinlock.h
+++ b/xen/include/xen/spinlock.h
@@ -34,6 +34,7 @@ void _spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags);
 int _spin_is_locked(spinlock_t *lock);
 int _spin_trylock(spinlock_t *lock);
 void _spin_barrier(spinlock_t *lock);
+void _spin_barrier_irq(spinlock_t *lock);
 
 void _spin_lock_recursive(spinlock_t *lock);
 void _spin_unlock_recursive(spinlock_t *lock);
@@ -67,6 +68,7 @@ void _write_unlock_irqrestore(rwlock_t *lock, unsigned long flags);
 
 /* Ensure a lock is quiescent between two critical operations. */
 #define spin_barrier(l)               _spin_barrier(l)
+#define spin_barrier_irq(l)           _spin_barrier_irq(l)
 
 /*
  * spin_[un]lock_recursive(): Use these forms when the lock can (safely!) be