return READ_ONCE(rsclp->seglen[seg]);
}
+/* Return number of callbacks in segmented callback list by summing seglen. */
+long rcu_segcblist_n_segment_cbs(struct rcu_segcblist *rsclp)
+{
+ long len = 0;
+ int i;
+
+ for (i = RCU_DONE_TAIL; i < RCU_CBLIST_NSEGS; i++)
+ len += rcu_segcblist_get_seglen(rsclp, i);
+
+ return len;
+}
+
/* Set the length of a segment of the rcu_segcblist structure. */
static void rcu_segcblist_set_seglen(struct rcu_segcblist *rsclp, int seg, long v)
{
return READ_ONCE(rclp->len);
}
+/* Return number of callbacks in segmented callback list by summing seglen. */
+long rcu_segcblist_n_segment_cbs(struct rcu_segcblist *rsclp);
+
void rcu_cblist_init(struct rcu_cblist *rclp);
void rcu_cblist_enqueue(struct rcu_cblist *rclp, struct rcu_head *rhp);
void rcu_cblist_flush_enqueue(struct rcu_cblist *drclp,
static void rcu_do_batch(struct rcu_data *rdp)
{
int div;
+ bool __maybe_unused empty;
unsigned long flags;
const bool offloaded = rcu_segcblist_is_offloaded(&rdp->cblist);
struct rcu_head *rhp;
* The following usually indicates a double call_rcu(). To track
* this down, try building with CONFIG_DEBUG_OBJECTS_RCU_HEAD=y.
*/
- WARN_ON_ONCE(count == 0 && !rcu_segcblist_empty(&rdp->cblist));
+ empty = rcu_segcblist_empty(&rdp->cblist);
+ WARN_ON_ONCE(count == 0 && !empty);
WARN_ON_ONCE(!IS_ENABLED(CONFIG_RCU_NOCB_CPU) &&
- count != 0 && rcu_segcblist_empty(&rdp->cblist));
+ count != 0 && empty);
+ WARN_ON_ONCE(count == 0 && rcu_segcblist_n_segment_cbs(&rdp->cblist) != 0);
+ WARN_ON_ONCE(!empty && rcu_segcblist_n_segment_cbs(&rdp->cblist) == 0);
rcu_nocb_unlock_irqrestore(rdp, flags);