---

yaml --- r: 147339 b: refs/heads/master c: 98c2aaf h: refs/heads/master i: 147337: 2cfc917 147335: 0c64bda v: v3
git-mirror · Apr 7, 2009 · 34d76d9 · 34d76d9
1 parent ffe65c2
commit 34d76d9
Show file tree

Hide file tree

Showing 2 changed files with 22 additions and 4 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 6278af660ff83fbafb18e53fc2747eb2ee6780fa
+refs/heads/master: 98c2aaf8be5baf7193be37fb28bce8e7327158bc
diff --git a/trunk/arch/x86/include/asm/atomic_32.h b/trunk/arch/x86/include/asm/atomic_32.h
@@ -291,19 +291,37 @@ atomic64_cmpxchg(atomic64_t *ptr, unsigned long long old_val,
 }
 
 /**
- * atomic64_set - set atomic64 variable
+ * atomic64_xchg - xchg atomic64 variable
  * @ptr:      pointer to type atomic64_t
  * @new_val:  value to assign
+ * @old_val:  old value that was there
  *
- * Atomically sets the value of @ptr to @new_val.
+ * Atomically xchgs the value of @ptr to @new_val and returns
+ * the old value.
  */
-static inline void atomic64_set(atomic64_t *ptr, unsigned long long new_val)
+
+static inline unsigned long long
+atomic64_xchg(atomic64_t *ptr, unsigned long long new_val)
 {
 	unsigned long long old_val;
 
 	do {
 		old_val = atomic_read(ptr);
 	} while (atomic64_cmpxchg(ptr, old_val, new_val) != old_val);
+
+	return old_val;
+}
+
+/**
+ * atomic64_set - set atomic64 variable
+ * @ptr:      pointer to type atomic64_t
+ * @new_val:  value to assign
+ *
+ * Atomically sets the value of @ptr to @new_val.
+ */
+static inline void atomic64_set(atomic64_t *ptr, unsigned long long new_val)
+{
+	atomic64_xchg(ptr, new_val);
 }
 
 /**