linux-kernel - [PATCH] remove list_for_each

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Message-ID: <20080801211105.GA14851@linux.vnet.ibm.com>
Date:	Fri, 1 Aug 2008 14:11:05 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	mingo@...e.hu, akpm@...ux-foundation.org, dvhltc@...ibm.com,
	niv@...ibm.com, dipankar@...ibm.com, bunk@...nel.org
Subject: [PATCH] remove list_for_each_rcu()

Hello!

All of the in-tree uses of list_for_each_rcu() have been converted to
list_for_each_entry_rcu(), so list_for_each_rcu() can now be removed.

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

 Documentation/RCU/checklist.txt |    2 +-
 Documentation/RCU/whatisRCU.txt |    2 --
 include/linux/rculist.h         |   14 --------------
 3 files changed, 1 insertion(+), 17 deletions(-)

diff --git a/Documentation/RCU/checklist.txt b/Documentation/RCU/checklist.txt
index cf5562c..6e25340 100644
--- a/Documentation/RCU/checklist.txt
+++ b/Documentation/RCU/checklist.txt
@@ -210,7 +210,7 @@ over a rather long period of time, but improvements are always welcome!
 		number of updates per grace period.
 
 9.	All RCU list-traversal primitives, which include
-	rcu_dereference(), list_for_each_rcu(), list_for_each_entry_rcu(),
+	rcu_dereference(), list_for_each_entry_rcu(),
 	list_for_each_continue_rcu(), and list_for_each_safe_rcu(),
 	must be either within an RCU read-side critical section or
 	must be protected by appropriate update-side locks.  RCU
diff --git a/Documentation/RCU/whatisRCU.txt b/Documentation/RCU/whatisRCU.txt
index e04d643..9617082 100644
--- a/Documentation/RCU/whatisRCU.txt
+++ b/Documentation/RCU/whatisRCU.txt
@@ -786,8 +786,6 @@ RCU pointer/list traversal:
 	list_for_each_entry_rcu
 	hlist_for_each_entry_rcu
 
-	list_for_each_rcu		(to be deprecated in favor of
-					 list_for_each_entry_rcu)
 	list_for_each_continue_rcu	(to be deprecated in favor of new
 					 list_for_each_entry_continue_rcu)
 
diff --git a/include/linux/rculist.h b/include/linux/rculist.h
index b0f39be..25dc894 100644
--- a/include/linux/rculist.h
+++ b/include/linux/rculist.h
@@ -170,20 +170,6 @@ static inline void list_splice_init_rcu(struct list_head *list,
 	at->prev = last;
 }
 
-/**
- * list_for_each_rcu	-	iterate over an rcu-protected list
- * @pos:	the &struct list_head to use as a loop cursor.
- * @head:	the head for your list.
- *
- * This list-traversal primitive may safely run concurrently with
- * the _rcu list-mutation primitives such as list_add_rcu()
- * as long as the traversal is guarded by rcu_read_lock().
- */
-#define list_for_each_rcu(pos, head) \
-	for (pos = rcu_dereference((head)->next); \
-		prefetch(pos->next), pos != (head); \
-		pos = rcu_dereference(pos->next))
-
 #define __list_for_each_rcu(pos, head) \
 	for (pos = rcu_dereference((head)->next); \
 		pos != (head); \
--
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