[Suspend2][ 02/13] [Suspend2] Fill skb pool.

[Nigel Cunningham <nigel@suspend2.net>]

Fill the skb pool used to communicate with userspace helpers.

Signed-off-by: Nigel Cunningham <nigel@suspend2.net>

 kernel/power/netlink.c |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/kernel/power/netlink.c b/kernel/power/netlink.c
index 8d27801..d169096 100644
--- a/kernel/power/netlink.c
+++ b/kernel/power/netlink.c
@@ -15,3 +15,22 @@
 #ifdef CONFIG_NET
 struct user_helper_data *uhd_list = NULL;
        
+/* 
+ * Refill our pool of SKBs for use in emergencies (eg, when eating memory and none
+ * can be allocated).
+ */
+static void suspend_fill_skb_pool(struct user_helper_data *uhd)
+{
+	while (uhd->pool_level < uhd->pool_limit) {
+		struct sk_buff *new_skb =
+			alloc_skb(NLMSG_SPACE(uhd->skb_size), GFP_ATOMIC);
+
+		if (!new_skb)
+			break;
+
+		new_skb->next = uhd->emerg_skbs;
+		uhd->emerg_skbs = new_skb;
+		uhd->pool_level++;
+	}
+}
+

--
Nigel Cunningham		nigel at suspend2 dot net