The patch titled
list: introduce list_replace() helper
has been added to the -mm tree. Its filename is
list-introduce-list_replace-helper.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
From: Oleg Nesterov <oleg@xxxxxxxxxx>
list_replace() is similar to list_replace_rcu(), but unlike
list_replace_rcu() it
could be used when list_empty(old) == 1
doesn't use barriers
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
include/linux/list.h | 23 +++++++++++++++++++++++
1 files changed, 23 insertions(+)
diff -puN include/linux/list.h~list-introduce-list_replace-helper include/linux/list.h
--- devel/include/linux/list.h~list-introduce-list_replace-helper 2006-05-18 01:25:32.000000000 -0700
+++ devel-akpm/include/linux/list.h 2006-05-18 01:25:32.000000000 -0700
@@ -190,12 +190,35 @@ static inline void list_del_rcu(struct l
entry->prev = LIST_POISON2;
}
+/**
+ * list_replace - replace old entry by new one
+ * @old : the element to be replaced
+ * @new : the new element to insert
+ * Note: if 'old' was empty, it will be overwritten.
+ */
+static inline void list_replace(struct list_head *old,
+ struct list_head *new)
+{
+ new->next = old->next;
+ new->next->prev = new;
+ new->prev = old->prev;
+ new->prev->next = new;
+}
+
+static inline void list_replace_init(struct list_head *old,
+ struct list_head *new)
+{
+ list_replace(old, new);
+ INIT_LIST_HEAD(old);
+}
+
/*
* list_replace_rcu - replace old entry by new one
* @old : the element to be replaced
* @new : the new element to insert
*
* The old entry will be replaced with the new entry atomically.
+ * Note: 'old' should not be empty.
*/
static inline void list_replace_rcu(struct list_head *old,
struct list_head *new)
_
Patches currently in -mm which might be from oleg@xxxxxxxxxx are
avoid-tasklist_lock-at-getrusage-for-multithreaded-case-too.patch
ptrace-document-the-locking-rules.patch
when-config_base_samll=1-the-kernel-261611-cascade-in-kernel-timerc-may-enter-the-infinite-loop.patch
list-introduce-list_replace-helper.patch
proc-remove-tasklist_lock-from-proc_pid_readdir-simply-fix-first_tgid.patch
proc-dont-lock-task_structs-indefinitely.patch
proc-dont-lock-task_structs-indefinitely-task_mmu-small-fixes.patch
simplify-fix-first_tid.patch
cleanup-next_tid.patch
de_thread-fix-lockless-do_each_thread.patch
coredump-optimize-mm-users-traversal.patch
coredump-speedup-sigkill-sending.patch
coredump-kill-ptrace-related-stuff.patch
coredump-kill-ptrace-related-stuff-fix.patch
coredump-dont-take-tasklist_lock.patch
coredump-some-code-relocations.patch
coredump-shutdown-current-process-first.patch
coredump-copy_process-dont-check-signal_group_exit.patch
pidhash-temporary-debug-checks.patch
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