rename thread_info to stack

[powerpc.git] / include / linux / spinlock.h

diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h
index 61fef37..a946176 100644 (file)
--- a/include/linux/spinlock.h
+++ b/include/linux/spinlock.h
@@ -282,6 +282,43 @@ do {                                               \
        1 : ({ local_irq_restore(flags); 0; }); \
 })
 
+/*
+ * Locks two spinlocks l1 and l2.
+ * l1_first indicates if spinlock l1 should be taken first.
+ */
+static inline void double_spin_lock(spinlock_t *l1, spinlock_t *l2,
+                                   bool l1_first)
+       __acquires(l1)
+       __acquires(l2)
+{
+       if (l1_first) {
+               spin_lock(l1);
+               spin_lock(l2);
+       } else {
+               spin_lock(l2);
+               spin_lock(l1);
+       }
+}
+
+/*
+ * Unlocks two spinlocks l1 and l2.
+ * l1_taken_first indicates if spinlock l1 was taken first and therefore
+ * should be released after spinlock l2.
+ */
+static inline void double_spin_unlock(spinlock_t *l1, spinlock_t *l2,
+                                     bool l1_taken_first)
+       __releases(l1)
+       __releases(l2)
+{
+       if (l1_taken_first) {
+               spin_unlock(l2);
+               spin_unlock(l1);
+       } else {
+               spin_unlock(l1);
+               spin_unlock(l2);
+       }
+}
+
 /*
  * Pull the atomic_t declaration:
  * (asm-mips/atomic.h needs above definitions)