From mboxrd@z Thu Jan 1 00:00:00 1970 From: Huang Rui Subject: Re: [PATCH 1/2] list: introduce list_bulk_move_tail helper Date: Fri, 14 Sep 2018 10:53:19 +0800 Message-ID: <20180914025228.GA17902@hr-amur2> References: <20180913112208.1353-1-christian.koenig@amd.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit Return-path: Content-Disposition: inline In-Reply-To: <20180913112208.1353-1-christian.koenig@amd.com> Sender: linux-kernel-owner@vger.kernel.org To: Christian =?iso-8859-1?Q?K=F6nig?= Cc: amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org List-Id: amd-gfx.lists.freedesktop.org On Thu, Sep 13, 2018 at 01:22:07PM +0200, Christian König wrote: > Move all entries between @first and including @last before @head. > > This is useful for LRU lists where a whole block of entries should be > moved to the end of an list. > > Signed-off-by: Christian König Bulk move helper is useful for TTM driver to improve the LRU moving efficiency. Please go on with my RB. Series are Reviewed-and-Tested-by: Huang Rui > --- > include/linux/list.h | 23 +++++++++++++++++++++++ > 1 file changed, 23 insertions(+) > > diff --git a/include/linux/list.h b/include/linux/list.h > index de04cc5ed536..edb7628e46ed 100644 > --- a/include/linux/list.h > +++ b/include/linux/list.h > @@ -183,6 +183,29 @@ static inline void list_move_tail(struct list_head *list, > list_add_tail(list, head); > } > > +/** > + * list_bulk_move_tail - move a subsection of a list to its tail > + * @head: the head that will follow our entry > + * @first: first entry to move > + * @last: last entry to move, can be the same as first > + * > + * Move all entries between @first and including @last before @head. > + * All three entries must belong to the same linked list. > + */ > +static inline void list_bulk_move_tail(struct list_head *head, > + struct list_head *first, > + struct list_head *last) > +{ > + first->prev->next = last->next; > + last->next->prev = first->prev; > + > + head->prev->next = first; > + first->prev = head->prev; > + > + last->next = head; > + head->prev = last; > +} > + > /** > * list_is_last - tests whether @list is the last entry in list @head > * @list: the entry to test > -- > 2.14.1 > > _______________________________________________ > amd-gfx mailing list > amd-gfx@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/amd-gfx