unimore/kernel-hacking-2024-linux-steffo
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netprio_cgroup: Use memcpy instead of the for-loop to copy priomap

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Replace the current (inefficient) for-loop with memcpy, to copy priomap.

Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Srivatsa S. Bhat 2012-09-12 20:32:34 +00:00 committed by David S. Miller
parent d530d6df96
commit f05ba7fccf
1 changed files with 4 additions and 5 deletions
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9
net/core/netprio_cgroup.c
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@ -73,7 +73,6 @@ static int extend_netdev_table(struct net_device *dev, u32 new_len)
((sizeof(u32) * new_len));
struct netprio_map *new_priomap = kzalloc(new_size, GFP_KERNEL);
struct netprio_map *old_priomap;
int i;
old_priomap = rtnl_dereference(dev->priomap);
@ -82,10 +81,10 @@ static int extend_netdev_table(struct net_device *dev, u32 new_len)
return -ENOMEM;
}
for (i = 0;
old_priomap && (i < old_priomap->priomap_len);
i++)
new_priomap->priomap[i] = old_priomap->priomap[i];
if (old_priomap)
memcpy(new_priomap->priomap, old_priomap->priomap,
old_priomap->priomap_len *
sizeof(old_priomap->priomap[0]));
new_priomap->priomap_len = new_len;