Linux-libre 4.8.2-gnupck-4.8.2-gnu

1 files changed, 26 insertions, 4 deletions

diff --git a/include/uapi/linux/tipc.h b/include/uapi/linux/tipc.h
index 6f71b9b41..bf049e8fe 100644
--- a/include/uapi/linux/tipc.h
+++ b/include/uapi/linux/tipc.h
@@ -60,26 +60,48 @@ struct tipc_name_seq {
 	__u32 upper;
 };
 
+/* TIPC Address Size, Offset, Mask specification for Z.C.N
+ */
+#define TIPC_NODE_BITS          12
+#define TIPC_CLUSTER_BITS       12
+#define TIPC_ZONE_BITS          8
+
+#define TIPC_NODE_OFFSET        0
+#define TIPC_CLUSTER_OFFSET     TIPC_NODE_BITS
+#define TIPC_ZONE_OFFSET        (TIPC_CLUSTER_OFFSET + TIPC_CLUSTER_BITS)
+
+#define TIPC_NODE_SIZE          ((1UL << TIPC_NODE_BITS) - 1)
+#define TIPC_CLUSTER_SIZE       ((1UL << TIPC_CLUSTER_BITS) - 1)
+#define TIPC_ZONE_SIZE          ((1UL << TIPC_ZONE_BITS) - 1)
+
+#define TIPC_NODE_MASK		(TIPC_NODE_SIZE << TIPC_NODE_OFFSET)
+#define TIPC_CLUSTER_MASK	(TIPC_CLUSTER_SIZE << TIPC_CLUSTER_OFFSET)
+#define TIPC_ZONE_MASK		(TIPC_ZONE_SIZE << TIPC_ZONE_OFFSET)
+
+#define TIPC_ZONE_CLUSTER_MASK (TIPC_ZONE_MASK | TIPC_CLUSTER_MASK)
+
 static inline __u32 tipc_addr(unsigned int zone,
 			      unsigned int cluster,
 			      unsigned int node)
 {
-	return (zone << 24) | (cluster << 12) | node;
+	return (zone << TIPC_ZONE_OFFSET) |
+		(cluster << TIPC_CLUSTER_OFFSET) |
+		node;
 }
 
 static inline unsigned int tipc_zone(__u32 addr)
 {
-	return addr >> 24;
+	return addr >> TIPC_ZONE_OFFSET;
 }
 
 static inline unsigned int tipc_cluster(__u32 addr)
 {
-	return (addr >> 12) & 0xfff;
+	return (addr & TIPC_CLUSTER_MASK) >> TIPC_CLUSTER_OFFSET;
 }
 
 static inline unsigned int tipc_node(__u32 addr)
 {
-	return addr & 0xfff;
+	return addr & TIPC_NODE_MASK;
 }
 
 /*