X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Fspinlock.h;h=a946176db638c7198705a20a7d2fd715279dfc2d;hb=bb50cbbd4beacd5ceda76c32fcb116c67fe8c66c;hp=61fef376ed2e6161299719f8b3a7cfaf4f246b33;hpb=c75fb88dbcc470e6041a20b1457b4835b9a0a48a;p=linux-2.6-omap-h63xx.git

diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h
index 61fef376ed2..a946176db63 100644
--- 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)