rcu: Merge per-RCU-flavor initialization into pre-existing macro

Rename the RCU_DATA_PTR_INIT() macro to RCU_INIT_FLAVOR() and
make it do the rcu_init_one() and rcu_boot_init_percpu_data()
calls.  Merge the loop that was in the original macro with the
loops that were in __rcu_init().

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: laijs@cn.fujitsu.com
Cc: dipankar@in.ibm.com
Cc: akpm@linux-foundation.org
Cc: mathieu.desnoyers@polymtl.ca
Cc: josht@linux.vnet.ibm.com
Cc: dvhltc@us.ibm.com
Cc: niv@us.ibm.com
Cc: peterz@infradead.org
Cc: rostedt@goodmis.org
LKML-Reference: <12509746133916-git-send-email->
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 5 insertions, 9 deletions

diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index 4d71d4e8b5a8..7c515082ae84 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -1543,8 +1543,9 @@ static void __init rcu_init_one(struct rcu_state *rsp)
  * Helper macro for __rcu_init().  To be used nowhere else!
  * Assigns leaf node pointers into each CPU's rcu_data structure.
  */
-#define RCU_DATA_PTR_INIT(rsp, rcu_data) \
+#define RCU_INIT_FLAVOR(rsp, rcu_data) \
 do { \
+        rcu_init_one(rsp); \
         rnp = (rsp)->level[NUM_RCU_LVLS - 1]; \
         j = 0; \
         for_each_possible_cpu(i) { \
@@ -1552,6 +1553,7 @@ do { \
                         j++; \
                 per_cpu(rcu_data, i).mynode = &rnp[j]; \
                 (rsp)->rda[i] = &per_cpu(rcu_data, i); \
+                rcu_boot_init_percpu_data(i, rsp); \
         } \
 } while (0)
 
@@ -1565,14 +1567,8 @@ void __init __rcu_init(void)
 #ifdef CONFIG_RCU_CPU_STALL_DETECTOR
         printk(KERN_INFO "RCU-based detection of stalled CPUs is enabled.\n");
 #endif /* #ifdef CONFIG_RCU_CPU_STALL_DETECTOR */
-        rcu_init_one(&rcu_sched_state);
-        RCU_DATA_PTR_INIT(&rcu_sched_state, rcu_sched_data);
-        for_each_possible_cpu(i)
-                rcu_boot_init_percpu_data(i, &rcu_sched_state);
-        rcu_init_one(&rcu_bh_state);
-        RCU_DATA_PTR_INIT(&rcu_bh_state, rcu_bh_data);
-        for_each_possible_cpu(i)
-                rcu_boot_init_percpu_data(i, &rcu_bh_state);
+        RCU_INIT_FLAVOR(&rcu_sched_state, rcu_sched_data);
+        RCU_INIT_FLAVOR(&rcu_bh_state, rcu_bh_data);
         open_softirq(RCU_SOFTIRQ, rcu_process_callbacks);
 }