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authorYangbo Lu <yangbo.lu@nxp.com>2021-04-27 07:22:00 +0300
committerDavid S. Miller <davem@davemloft.net>2021-04-28 00:10:15 +0300
commitc4b364ce1270d689ee5010001344b8eae3685f32 (patch)
tree9067cf9a35e95a99308d823ba9b2db06165fb8ae /include/net
parent5c5416f5d4c75fe6aba56f6c2c45a070b5e7cc78 (diff)
downloadlinux-c4b364ce1270d689ee5010001344b8eae3685f32.tar.xz
net: dsa: free skb->cb usage in core driver
Free skb->cb usage in core driver and let device drivers decide to use or not. The reason having a DSA_SKB_CB(skb)->clone was because dsa_skb_tx_timestamp() which may set the clone pointer was called before p->xmit() which would use the clone if any, and the device driver has no way to initialize the clone pointer. This patch just put memset(skb->cb, 0, sizeof(skb->cb)) at beginning of dsa_slave_xmit(). Some new features in the future, like one-step timestamp may need more bytes of skb->cb to use in dsa_skb_tx_timestamp(), and p->xmit(). Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com> Acked-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/dsa.h14
1 files changed, 0 insertions, 14 deletions
diff --git a/include/net/dsa.h b/include/net/dsa.h
index 73ce6ce38aa1..e1a2610a0e06 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -117,20 +117,6 @@ struct dsa_netdevice_ops {
#define MODULE_ALIAS_DSA_TAG_DRIVER(__proto) \
MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE))
-struct dsa_skb_cb {
- struct sk_buff *clone;
-};
-
-struct __dsa_skb_cb {
- struct dsa_skb_cb cb;
- u8 priv[48 - sizeof(struct dsa_skb_cb)];
-};
-
-#define DSA_SKB_CB(skb) ((struct dsa_skb_cb *)((skb)->cb))
-
-#define DSA_SKB_CB_PRIV(skb) \
- ((void *)(skb)->cb + offsetof(struct __dsa_skb_cb, priv))
-
struct dsa_switch_tree {
struct list_head list;