1 files changed, 21 insertions, 4 deletions

diff --git a/include/linux/fence.h b/include/linux/fence.h
index 39efee130d2b..bb522011383b 100644
--- a/include/linux/fence.h
+++ b/include/linux/fence.h
@@ -280,6 +280,22 @@ fence_is_signaled(struct fence *fence)
 }
 
 /**
+ * fence_is_later - return if f1 is chronologically later than f2
+ * @f1: [in]    the first fence from the same context
+ * @f2: [in]    the second fence from the same context
+ *
+ * Returns true if f1 is chronologically later than f2. Both fences must be
+ * from the same context, since a seqno is not re-used across contexts.
+ */
+static inline bool fence_is_later(struct fence *f1, struct fence *f2)
+{
+        if (WARN_ON(f1->context != f2->context))
+                return false;
+
+        return f1->seqno - f2->seqno < INT_MAX;
+}
+
+/**
  * fence_later - return the chronologically later fence
  * @f1: [in]    the first fence from the same context
  * @f2: [in]    the second fence from the same context
@@ -298,14 +314,15 @@ static inline struct fence *fence_later(struct fence *f1, struct fence *f2)
          * set if enable_signaling wasn't called, and enabling that here is
          * overkill.
          */
-        if (f2->seqno - f1->seqno <= INT_MAX)
-                return fence_is_signaled(f2) ? NULL : f2;
-        else
+        if (fence_is_later(f1, f2))
                 return fence_is_signaled(f1) ? NULL : f1;
+        else
+                return fence_is_signaled(f2) ? NULL : f2;
 }
 
 signed long fence_wait_timeout(struct fence *, bool intr, signed long timeout);
-
+signed long fence_wait_any_timeout(struct fence **fences, uint32_t count,
+                                   bool intr, signed long timeout);
 
 /**
  * fence_wait - sleep until the fence gets signaled