rcu: Use IS_ENABLED() to CONFIG_RCU_FANOUT_EXACT #ifdef

This commit uses IS_ENABLED() to remove the #ifdef from the
rcu_init_levelspread() functions.  No effect on executable code.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

1 files changed, 14 insertions, 18 deletions

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 4e37c7fd9e29..35e1604f7e3e 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -3734,30 +3734,26 @@ void rcu_scheduler_starting(void)
  * Compute the per-level fanout, either using the exact fanout specified
  * or balancing the tree, depending on CONFIG_RCU_FANOUT_EXACT.
  */
-#ifdef CONFIG_RCU_FANOUT_EXACT
 static void __init rcu_init_levelspread(struct rcu_state *rsp)
 {
         int i;
 
-        rsp->levelspread[rcu_num_lvls - 1] = rcu_fanout_leaf;
-        for (i = rcu_num_lvls - 2; i >= 0; i--)
-                rsp->levelspread[i] = CONFIG_RCU_FANOUT;
-}
-#else /* #ifdef CONFIG_RCU_FANOUT_EXACT */
-static void __init rcu_init_levelspread(struct rcu_state *rsp)
-{
-        int ccur;
-        int cprv;
-        int i;
-
-        cprv = nr_cpu_ids;
-        for (i = rcu_num_lvls - 1; i >= 0; i--) {
-                ccur = rsp->levelcnt[i];
-                rsp->levelspread[i] = (cprv + ccur - 1) / ccur;
-                cprv = ccur;
+        if (IS_ENABLED(CONFIG_RCU_FANOUT_EXACT)) {
+                rsp->levelspread[rcu_num_lvls - 1] = rcu_fanout_leaf;
+                for (i = rcu_num_lvls - 2; i >= 0; i--)
+                        rsp->levelspread[i] = CONFIG_RCU_FANOUT;
+        } else {
+                int ccur;
+                int cprv;
+
+                cprv = nr_cpu_ids;
+                for (i = rcu_num_lvls - 1; i >= 0; i--) {
+                        ccur = rsp->levelcnt[i];
+                        rsp->levelspread[i] = (cprv + ccur - 1) / ccur;
+                        cprv = ccur;
+                }
         }
 }
-#endif /* #else #ifdef CONFIG_RCU_FANOUT_EXACT */
 
 /*
  * Helper function for rcu_init() that initializes one rcu_state structure.