rcu: Remove redundant nxttail index macro define

RCU's nxttail has been optimized to be a rcu_segcblist, which is
a multi-tailed linked list with macros defined for the indexes for
each tail.  The indexes have been defined in linux/rcu_segcblist.h,
so this commit removes the redundant definitions in kernel/rcu/tree.h.

Signed-off-by: Liu Changcheng <changcheng.liu@intel.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

1 files changed, 0 insertions, 7 deletions

diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h
index 2edd56397b00..f491ab4f2e8e 100644
--- a/kernel/rcu/tree.h
+++ b/kernel/rcu/tree.h
@@ -178,13 +178,6 @@ union rcu_noqs {
         u16 s; /* Set of bits, aggregate OR here. */
 };
 
-/* Index values for nxttail array in struct rcu_data. */
-#define RCU_DONE_TAIL           0       /* Also RCU_WAIT head. */
-#define RCU_WAIT_TAIL           1       /* Also RCU_NEXT_READY head. */
-#define RCU_NEXT_READY_TAIL     2       /* Also RCU_NEXT head. */
-#define RCU_NEXT_TAIL           3
-#define RCU_NEXT_SIZE           4
-
 /* Per-CPU data for read-copy update. */
 struct rcu_data {
         /* 1) quiescent-state and grace-period handling : */