[PATCH 1/5] rcu: uninline __rcu_pending()

Oleg Nesterov
2006-01-08T18:03:06Z

__rcu_pending() is rather fat and called twice from rcu_pending().

rcu_pending() has multiple callers, and not that small too.

This patch uninlines both of them.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>

--- 2.6.15/include/linux/rcupdate.h~1_OUTL 2006-01-03 21:15:58.000000000 +0300
+++ 2.6.15/include/linux/rcupdate.h 2006-01-08 21:36:07.000000000 +0300
@@ -125,36 +125,7 @@ static inline void rcu_bh_qsctr_inc(int
rdp->passed_quiesc = 1;
}

-static inline int __rcu_pending(struct rcu_ctrlblk *rcp,
- struct rcu_data *rdp)
-{
- /* This cpu has pending rcu entries and the grace period
- * for them has completed.
- */
- if (rdp->curlist && !rcu_batch_before(rcp->completed, rdp->batch))
- return 1;
-
- /* This cpu has no pending entries, but there are new entries */
- if (!rdp->curlist && rdp->nxtlist)
- return 1;
-
- /* This cpu has finished callbacks to invoke */
- if (rdp->donelist)
- return 1;
-
- /* The rcu core waits for a quiescent state from the cpu */
- if (rdp->quiescbatch != rcp->cur || rdp->qs_pending)
- return 1;
-
- /* nothing to do */
- return 0;
-}
-
-static inline int rcu_pending(int cpu)
-{
- return __rcu_pending(&rcu_ctrlblk, &per_cpu(rcu_data, cpu)) ||
- __rcu_pending(&rcu_bh_ctrlblk, &per_cpu(rcu_bh_data, cpu));
-}
+extern int rcu_pending(int cpu);

/**
* rcu_read_lock - mark the beginning of an RCU read-side critical section.
--- 2.6.15/kernel/rcupdate.c~1_OUTL 2006-01-03 21:15:58.000000000 +0300
+++ 2.6.15/kernel/rcupdate.c 2006-01-08 21:35:21.000000000 +0300
@@ -442,6 +442,36 @@ static void rcu_process_callbacks(unsign
&__get_cpu_var(rcu_bh_data));
}

+static int __rcu_pending(struct rcu_ctrlblk *rcp, struct rcu_data *rdp)
+{
+ /* This cpu has pending rcu entries and the grace period
+ * for them has completed.
+ */
+ if (rdp->curlist && !rcu_batch_before(rcp->completed, rdp->batch))
+ return 1;
+
+ /* This cpu has no pending entries, but there are new entries */
+ if (!rdp->curlist && rdp->nxtlist)
+ return 1;
+
+ /* This cpu has finished callbacks to invoke */
+ if (rdp->donelist)
+ return 1;
+
+ /* The rcu core waits for a quiescent state from the cpu */
+ if (rdp->quiescbatch != rcp->cur || rdp->qs_pending)
+ return 1;
+
+ /* nothing to do */
+ return 0;
+}
+
+int rcu_pending(int cpu)
+{
+ return __rcu_pending(&rcu_ctrlblk, &per_cpu(rcu_data, cpu)) ||
+ __rcu_pending(&rcu_bh_ctrlblk, &per_cpu(rcu_bh_data, cpu));
+}
+
void rcu_check_callbacks(int cpu, int user)
{
if (user ||