[VLAN]: Avoid a 4-order allocation.

This patch splits the vlan_group struct into a multi-allocated struct. On
x86_64, the size of the original struct is a little more than 32KB, causing
a 4-order allocation, which is prune to problems caused by buddy-system
external fragmentation conditions.

I couldn't just use vmalloc() because vfree() cannot be called in the
softirq context of the RCU callback.

Signed-off-by: Dan Aloni <da-x@monatomic.org>
Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/net/ehea/ehea_main.c b/drivers/net/ehea/ehea_main.c
index 88ad1c8bcee4..0e4042bc0a48 100644
--- a/drivers/net/ehea/ehea_main.c
+++ b/drivers/net/ehea/ehea_main.c
@@ -1939,8 +1939,7 @@ static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
         int index;
         u64 hret;
 
-        if (port->vgrp)
-                port->vgrp->vlan_devices[vid] = NULL;
+        vlan_group_set_device(port->vgrp, vid, NULL);
 
         cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
         if (!cb1) {