X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=include%2Flinux%2Frcuclassic.h;h=29bf528c7dccbd595167399b7d25f5641a1485b8;hb=429b022af41108f6942d72547592b1d30e9a51f0;hp=8c774905dcfec6c5a98d500d396b5dfdee97837e;hpb=f39548a6ad1dbdfaab552419386ec5bb1d76fa0d;p=linux-2.6-block.git

diff --git a/include/linux/rcuclassic.h b/include/linux/rcuclassic.h
index 8c774905dcfe..29bf528c7dcc 100644
--- a/include/linux/rcuclassic.h
+++ b/include/linux/rcuclassic.h
@@ -45,7 +45,10 @@
 struct rcu_ctrlblk {
 	long	cur;		/* Current batch number.                      */
 	long	completed;	/* Number of the last completed batch         */
-	int	next_pending;	/* Is the next batch already waiting?         */
+	long	pending;	/* Number of the last pending batch           */
+#ifdef CONFIG_DEBUG_RCU_STALL
+	unsigned long gp_check;	/* Time grace period should end, in seconds.  */
+#endif /* #ifdef CONFIG_DEBUG_RCU_STALL */
 
 	int	signaled;
 
@@ -66,11 +69,7 @@ static inline int rcu_batch_after(long a, long b)
 	return (a - b) > 0;
 }
 
-/*
- * Per-CPU data for Read-Copy UPdate.
- * nxtlist - new callbacks are added here
- * curlist - current batch for which quiescent cycle started if any
- */
+/* Per-CPU data for Read-Copy UPdate. */
 struct rcu_data {
 	/* 1) quiescent state handling : */
 	long		quiescbatch;     /* Batch # for grace period */
@@ -78,12 +77,24 @@ struct rcu_data {
 	int		qs_pending;	 /* core waits for quiesc state */
 
 	/* 2) batch handling */
-	long  	       	batch;           /* Batch # for current RCU batch */
+	/*
+	 * if nxtlist is not NULL, then:
+	 * batch:
+	 *	The batch # for the last entry of nxtlist
+	 * [*nxttail[1], NULL = *nxttail[2]):
+	 *	Entries that batch # <= batch
+	 * [*nxttail[0], *nxttail[1]):
+	 *	Entries that batch # <= batch - 1
+	 * [nxtlist, *nxttail[0]):
+	 *	Entries that batch # <= batch - 2
+	 *	The grace period for these entries has completed, and
+	 *	the other grace-period-completed entries may be moved
+	 *	here temporarily in rcu_process_callbacks().
+	 */
+	long  	       	batch;
 	struct rcu_head *nxtlist;
-	struct rcu_head **nxttail;
+	struct rcu_head **nxttail[3];
 	long            qlen; 	 	 /* # of queued callbacks */
-	struct rcu_head *curlist;
-	struct rcu_head **curtail;
 	struct rcu_head *donelist;
 	struct rcu_head **donetail;
 	long		blimit;		 /* Upper limit on a processed batch */
@@ -117,7 +128,7 @@ extern int rcu_needs_cpu(int cpu);
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
 extern struct lockdep_map rcu_lock_map;
 # define rcu_read_acquire()	\
-			lock_acquire(&rcu_lock_map, 0, 0, 2, 1, _THIS_IP_)
+			lock_acquire(&rcu_lock_map, 0, 0, 2, 1, NULL, _THIS_IP_)
 # define rcu_read_release()	lock_release(&rcu_lock_map, 1, _THIS_IP_)
 #else
 # define rcu_read_acquire()	do { } while (0)