- rculisth-use-the-rcu-api.patch removed from -mm tree

[akpm]

The patch titled
     rculist.h: use the rcu API
has been removed from the -mm tree.  Its filename was
     rculisth-use-the-rcu-api.patch

This patch was dropped because of too much damage

The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/

------------------------------------------------------
Subject: rculist.h: use the rcu API
From: Franck Bui-Huu <[EMAIL PROTECTED]>

Make almost all list mutation primitives use rcu_assign_pointer().

The main point of this being readability improvement.

Signed-off-by: Franck Bui-Huu <[EMAIL PROTECTED]>
Acked-by: Paul E. McKenney <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---

 include/linux/rculist.h |   23 +++++++++--------------
 1 file changed, 9 insertions(+), 14 deletions(-)

diff -puN include/linux/rculist.h~rculisth-use-the-rcu-api 
include/linux/rculist.h
--- a/include/linux/rculist.h~rculisth-use-the-rcu-api
+++ a/include/linux/rculist.h
@@ -7,6 +7,7 @@
  * RCU-protected list version
  */
 #include <linux/list.h>
+#include <linux/rcupdate.h>
 
 /*
  * Insert a new entry between two known consecutive entries.
@@ -19,9 +20,8 @@ static inline void __list_add_rcu(struct
 {
        new->next = next;
        new->prev = prev;
-       smp_wmb();
+       rcu_assign_pointer(prev->next, new);
        next->prev = new;
-       prev->next = new;
 }
 
 /**
@@ -110,9 +110,8 @@ static inline void list_replace_rcu(stru
 {
        new->next = old->next;
        new->prev = old->prev;
-       smp_wmb();
+       rcu_assign_pointer(new->prev->next, new);
        new->next->prev = new;
-       new->prev->next = new;
        old->prev = LIST_POISON2;
 }
 
@@ -166,8 +165,7 @@ static inline void list_splice_init_rcu(
         */
 
        last->next = at;
-       smp_wmb();
-       head->next = first;
+       rcu_assign_pointer(head->next, first);
        first->prev = head;
        at->prev = last;
 }
@@ -280,10 +278,9 @@ static inline void hlist_replace_rcu(str
 
        new->next = next;
        new->pprev = old->pprev;
-       smp_wmb();
+       rcu_assign_pointer(*new->pprev, new);
        if (next)
                new->next->pprev = &new->next;
-       *new->pprev = new;
        old->pprev = LIST_POISON2;
 }
 
@@ -310,12 +307,12 @@ static inline void hlist_add_head_rcu(st
                                        struct hlist_head *h)
 {
        struct hlist_node *first = h->first;
+
        n->next = first;
        n->pprev = &h->first;
-       smp_wmb();
+       rcu_assign_pointer(h->first, n);
        if (first)
                first->pprev = &n->next;
-       h->first = n;
 }
 
 /**
@@ -341,9 +338,8 @@ static inline void hlist_add_before_rcu(
 {
        n->pprev = next->pprev;
        n->next = next;
-       smp_wmb();
+       rcu_assign_pointer(*(n->pprev), n);
        next->pprev = &n->next;
-       *(n->pprev) = n;
 }
 
 /**
@@ -369,8 +365,7 @@ static inline void hlist_add_after_rcu(s
 {
        n->next = prev->next;
        n->pprev = &prev->next;
-       smp_wmb();
-       prev->next = n;
+       rcu_assign_pointer(prev->next, n);
        if (n->next)
                n->next->pprev = &n->next;
 }
_

Patches currently in -mm which might be from [EMAIL PROTECTED] are

origin.patch
rculisth-use-the-rcu-api.patch

-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at  http://vger.kernel.org/majordomo-info.html