From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: linux-kernel@vger.kernel.org
Cc: mingo@elte.hu, laijs@cn.fujitsu.com, dipankar@in.ibm.com,
akpm@linux-foundation.org, mathieu.desnoyers@polymtl.ca,
josh@joshtriplett.org, niv@us.ibm.com, tglx@linutronix.de,
peterz@infradead.org, rostedt@goodmis.org,
Valdis.Kletnieks@vt.edu, dhowells@redhat.com,
edumazet@google.com, darren@dvhart.com, fweisbec@gmail.com,
sbw@mit.edu, patches@linaro.org,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Subject: [PATCH tip/core/rcu 3/6] rcu: Remove list_for_each_continue_rcu()
Date: Tue, 30 Oct 2012 09:27:52 -0700 [thread overview]
Message-ID: <1351614475-22895-3-git-send-email-paulmck@linux.vnet.ibm.com> (raw)
In-Reply-To: <1351614475-22895-1-git-send-email-paulmck@linux.vnet.ibm.com>
From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
The list_for_each_continue_rcu() macro is no longer used, so this commit
removes it. The list_for_each_entry_continue_rcu() macro should be
used instead.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---
Documentation/RCU/checklist.txt | 17 ++++++++---------
Documentation/RCU/whatisRCU.txt | 4 +---
include/linux/rculist.h | 17 -----------------
3 files changed, 9 insertions(+), 29 deletions(-)
diff --git a/Documentation/RCU/checklist.txt b/Documentation/RCU/checklist.txt
index cdb20d4..31ef8fe 100644
--- a/Documentation/RCU/checklist.txt
+++ b/Documentation/RCU/checklist.txt
@@ -271,15 +271,14 @@ over a rather long period of time, but improvements are always welcome!
The same cautions apply to call_rcu_bh() and call_rcu_sched().
9. All RCU list-traversal primitives, which include
- 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
- read-side critical sections are delimited by rcu_read_lock()
- and rcu_read_unlock(), or by similar primitives such as
- rcu_read_lock_bh() and rcu_read_unlock_bh(), in which case
- the matching rcu_dereference() primitive must be used in order
- to keep lockdep happy, in this case, rcu_dereference_bh().
+ rcu_dereference(), list_for_each_entry_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 read-side critical sections are delimited by
+ rcu_read_lock() and rcu_read_unlock(), or by similar primitives
+ such as rcu_read_lock_bh() and rcu_read_unlock_bh(), in which
+ case the matching rcu_dereference() primitive must be used in
+ order to keep lockdep happy, in this case, rcu_dereference_bh().
The reason that it is permissible to use RCU list-traversal
primitives when the update-side lock is held is that doing so
diff --git a/Documentation/RCU/whatisRCU.txt b/Documentation/RCU/whatisRCU.txt
index bf0f6de..9d30de0 100644
--- a/Documentation/RCU/whatisRCU.txt
+++ b/Documentation/RCU/whatisRCU.txt
@@ -789,9 +789,7 @@ RCU list traversal:
list_for_each_entry_rcu
hlist_for_each_entry_rcu
hlist_nulls_for_each_entry_rcu
-
- list_for_each_continue_rcu (to be deprecated in favor of new
- list_for_each_entry_continue_rcu)
+ list_for_each_entry_continue_rcu
RCU pointer/list update:
diff --git a/include/linux/rculist.h b/include/linux/rculist.h
index e0f0fab..c92dd28 100644
--- a/include/linux/rculist.h
+++ b/include/linux/rculist.h
@@ -286,23 +286,6 @@ static inline void list_splice_init_rcu(struct list_head *list,
&pos->member != (head); \
pos = list_entry_rcu(pos->member.next, typeof(*pos), member))
-
-/**
- * list_for_each_continue_rcu
- * @pos: the &struct list_head to use as a loop cursor.
- * @head: the head for your list.
- *
- * Iterate over an rcu-protected list, continuing after current point.
- *
- * 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_continue_rcu(pos, head) \
- for ((pos) = rcu_dereference_raw(list_next_rcu(pos)); \
- (pos) != (head); \
- (pos) = rcu_dereference_raw(list_next_rcu(pos)))
-
/**
* list_for_each_entry_continue_rcu - continue iteration over list of given type
* @pos: the type * to use as a loop cursor.
--
1.7.8
next prev parent reply other threads:[~2012-10-30 16:39 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-30 16:27 [PATCH tip/core/rcu 0/6] Fixes for 3.8 Paul E. McKenney
2012-10-30 16:27 ` [PATCH tip/core/rcu 1/6] rcu: Accelerate callbacks for CPU initiating a grace period Paul E. McKenney
2012-10-30 16:27 ` [PATCH tip/core/rcu 2/6] rcu: Fix batch-limit size problem Paul E. McKenney
2012-10-30 16:27 ` Paul E. McKenney [this message]
2012-10-30 16:27 ` [PATCH tip/core/rcu 4/6] rcu: Add new rcutorture module parameters to start/end test messages Paul E. McKenney
2012-10-30 16:27 ` [PATCH tip/core/rcu 5/6] rcu: Clarify memory-ordering properties of grace-period primitives Paul E. McKenney
2012-10-30 16:27 ` [PATCH tip/core/rcu 6/6] rcu: Reduce default RCU CPU stall warning timeout Paul E. McKenney
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