Re: [PATCH -mm] [2/3] add list_merge to list.h
From: Andrew Morton
Date: Fri Aug 04 2006 - 01:19:54 EST
On Thu, 3 Aug 2006 19:15:15 -0700
"Nate Diller" <nate.diller@xxxxxxxxx> wrote:
> + * list_merge - merge two headless lists
> + * @list: the new list to merge.
> + * @head: the place to add it in the first list.
> + *
> + * This is similar to list_splice(), except it merges every item onto @list,
> + * not excluding @head itself. It is a noop if @head already immediately
> + * preceeds @list.
> + */
> +static inline void list_merge(struct list_head *list, struct list_head *head)
> + struct list_head *last = list->prev;
> + struct list_head *at = head->next;
> + list->prev = head;
> + head->next = list;
> + last->next = at;
> + at->prev = last;
Interesting. I didn't realise that none of the existing functions could do
this. I wonder if we can flesh the comment out a bit: define "headless" a
little more verbosely.
Should we call it list_splice_headless() or something? list_merge is a bit
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