[PATCH] list.h: implement list_for_each_entry_safe

[Arnaldo Carvalho de Melo]

Hi Linus,

	Please consider pulling from:

bk://kernel.bkbits.net/acme/list-2.5

	I started converting IPX to struct list_head and also to use
list_for_eache_entry to simplify the code in the network families I maintain,
and in IPX I need the _safe variation for list_for_eache_entry.

- Arnaldo

You can import this changeset into BK by piping this whole message to:
'| bk receive [path to repository]' or apply the patch as usual.

===================================================================

ChangeSet@1.1219, 2003-05-04 04:39:21-03:00, [e-mail]
  o list.h: implement list_for_each_entry_safe

 list.h |   13 +++++++++++++
 1 files changed, 13 insertions(+)

diff -Nru a/include/linux/list.h b/include/linux/list.h
--- a/include/linux/list.h	Sun May  4 04:43:59 2003
+++ b/include/linux/list.h	Sun May  4 04:43:59 2003
@@ -297,6 +297,19 @@
 		     prefetch(pos->member.next))
 
 /**
+ * list_for_each_entry_safe - iterate over list of given type safe against removal of list entry
+ * @pos:	the type * to use as a loop counter.
+ * @n:		another type * to use as temporary storage
+ * @head:	the head for your list.
+ * @member:	the name of the list_struct within the struct.
+ */
+#define list_for_each_entry_safe(pos, n, head, member)			\
+	for (pos = list_entry((head)->next, typeof(*pos), member),	\
+		n = list_entry(pos->member.next, typeof(*pos), member);	\
+	     &pos->member != (head); 					\
+	     pos = n, n = list_entry(n->member.next, typeof(*n), member))
+
+/**
  * list_for_each_rcu	-	iterate over an rcu-protected list
  * @pos:	the &struct list_head to use as a loop counter.
  * @head:	the head for your list.

===================================================================

This BitKeeper patch contains the following changesets:
1.1219
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