From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030649AbWF0FFv (ORCPT ); Tue, 27 Jun 2006 01:05:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030685AbWF0Ejh (ORCPT ); Tue, 27 Jun 2006 00:39:37 -0400 Received: from cust9421.vic01.dataco.com.au ([203.171.70.205]:26587 "EHLO nigel.suspend2.net") by vger.kernel.org with ESMTP id S1030684AbWF0Ejf (ORCPT ); Tue, 27 Jun 2006 00:39:35 -0400 From: Nigel Cunningham Subject: [Suspend2][ 03/13] [Suspend2] Get and put skbs. Date: Tue, 27 Jun 2006 14:39:34 +1000 To: linux-kernel@vger.kernel.org Message-Id: <20060627043932.14630.93435.stgit@nigel.suspend2.net> In-Reply-To: <20060627043923.14630.565.stgit@nigel.suspend2.net> References: <20060627043923.14630.565.stgit@nigel.suspend2.net> Content-Type: text/plain; charset=utf-8; format=fixed Content-Transfer-Encoding: 8bit User-Agent: StGIT/0.9 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Get and put skbs used to communicate with userspace helpers. Signed-off-by: Nigel Cunningham kernel/power/netlink.c | 31 +++++++++++++++++++++++++++++++ 1 files changed, 31 insertions(+), 0 deletions(-) diff --git a/kernel/power/netlink.c b/kernel/power/netlink.c index d169096..82a9f6d 100644 --- a/kernel/power/netlink.c +++ b/kernel/power/netlink.c @@ -34,3 +34,34 @@ static void suspend_fill_skb_pool(struct } } +/* + * Try to allocate a single skb. If we can't get one, try to use one from + * our pool. + */ +static struct sk_buff *suspend_get_skb(struct user_helper_data *uhd) +{ + struct sk_buff *skb = + alloc_skb(NLMSG_SPACE(uhd->skb_size), GFP_ATOMIC); + + if (skb) + return skb; + + skb = uhd->emerg_skbs; + if (skb) { + uhd->pool_level--; + uhd->emerg_skbs = skb->next; + skb->next = NULL; + } + + return skb; +} + +static void put_skb(struct user_helper_data *uhd, struct sk_buff *skb) +{ + if (uhd->pool_level < uhd->pool_limit) { + skb->next = uhd->emerg_skbs; + uhd->emerg_skbs = skb; + } else + kfree_skb(skb); +} + -- Nigel Cunningham nigel at suspend2 dot net