[PATCH net-next 0/9] Use __vlan_hwaccel_*() helpers

[PATCH net-next 0/9] Use __vlan_hwaccel_*() helpers

[Michał Mirosław]

This series removes from networking core and driver code an assumption
about how VLAN tag presence is stored in an skb. This will allow to free
up overloading of VLAN.CFI bit to incidate tag's presence.

Michał Mirosław (9):
  cxgb4: use __vlan_hwaccel helpers
  nfnetlink/queue: use __vlan_hwaccel helpers
  net/core: use __vlan_hwaccel helpers
  8021q: use __vlan_hwaccel helpers
  bridge: use __vlan_hwaccel helpers
  ipv4/tunnel: use __vlan_hwaccel helpers
  benet: use __vlan_hwaccel helpers
  mlx4: use __vlan_hwaccel helpers
  sky2: use __vlan_hwaccel helpers

 drivers/infiniband/hw/cxgb4/cm.c            |  2 +-
 drivers/net/ethernet/emulex/benet/be_main.c | 13 +++++++++----
 drivers/net/ethernet/marvell/sky2.c         |  6 ++----
 drivers/net/ethernet/mellanox/mlx4/en_rx.c  |  2 +-
 net/8021q/vlan_core.c                       |  2 +-
 net/bridge/br_netfilter_hooks.c             | 15 +++++++++------
 net/bridge/br_private.h                     |  2 +-
 net/bridge/br_vlan.c                        |  6 +++---
 net/core/dev.c                              |  8 +++++---
 net/core/skbuff.c                           |  2 +-
 net/ipv4/ip_tunnel_core.c                   |  2 +-
 net/netfilter/nfnetlink_queue.c             |  5 +++--
 net/sched/act_vlan.c                        |  2 +-
 13 files changed, 38 insertions(+), 29 deletions(-)

-- 
2.19.1

[PATCH net-next 1/9] cxgb4: use __vlan_hwaccel helpers

[Michał Mirosław]

Use __vlan_hwaccel_put_tag() to set vlan tag and proto fields.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
---
 drivers/infiniband/hw/cxgb4/cm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c
index 615413bd3e8d..8ed01e07c463 100644
--- a/drivers/infiniband/hw/cxgb4/cm.c
+++ b/drivers/infiniband/hw/cxgb4/cm.c
@@ -3944,7 +3944,7 @@ static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
 	} else {
 		vlan_eh = (struct vlan_ethhdr *)(req + 1);
 		iph = (struct iphdr *)(vlan_eh + 1);
-		skb->vlan_tci = ntohs(cpl->vlan);
+		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), ntohs(cpl->vlan));
 	}
 
 	if (iph->version != 0x4)
-- 
2.19.1

[PATCH net-next 2/9] nfnetlink/queue: use __vlan_hwaccel helpers

[Michał Mirosław]

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
---
 net/netfilter/nfnetlink_queue.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c
index 43041f087eb3..1ce30efe6854 100644
--- a/net/netfilter/nfnetlink_queue.c
+++ b/net/netfilter/nfnetlink_queue.c
@@ -1148,8 +1148,9 @@ static int nfqa_parse_bridge(struct nf_queue_entry *entry,
 		if (!tb[NFQA_VLAN_TCI] || !tb[NFQA_VLAN_PROTO])
 			return -EINVAL;
 
-		entry->skb->vlan_tci = ntohs(nla_get_be16(tb[NFQA_VLAN_TCI]));
-		entry->skb->vlan_proto = nla_get_be16(tb[NFQA_VLAN_PROTO]);
+		__vlan_hwaccel_put_tag(entry->skb,
+			nla_get_be16(tb[NFQA_VLAN_PROTO]),
+			ntohs(nla_get_be16(tb[NFQA_VLAN_TCI])));
 	}
 
 	if (nfqa[NFQA_L2HDR]) {
-- 
2.19.1

[PATCH net-next 3/9] net/core: use __vlan_hwaccel helpers

[Michał Mirosław]

This removes assumptions about VLAN_TAG_PRESENT bit.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
---
 net/core/dev.c       | 8 +++++---
 net/core/skbuff.c    | 2 +-
 net/sched/act_vlan.c | 2 +-
 3 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index 0ffcbdd55fa9..bf7e0a471186 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4889,7 +4889,7 @@ static int __netif_receive_skb_core(struct sk_buff *skb, bool pfmemalloc,
 		 * and set skb->priority like in vlan_do_receive()
 		 * For the time being, just ignore Priority Code Point
 		 */
-		skb->vlan_tci = 0;
+		__vlan_hwaccel_clear_tag(skb);
 	}
 
 	type = skb->protocol;
@@ -5386,7 +5386,9 @@ static struct list_head *gro_list_prepare(struct napi_struct *napi,
 		}
 
 		diffs = (unsigned long)p->dev ^ (unsigned long)skb->dev;
-		diffs |= p->vlan_tci ^ skb->vlan_tci;
+		diffs |= skb_vlan_tag_present(p) ^ skb_vlan_tag_present(skb);
+		if (skb_vlan_tag_present(p))
+			diffs |= p->vlan_tci ^ skb->vlan_tci;
 		diffs |= skb_metadata_dst_cmp(p, skb);
 		diffs |= skb_metadata_differs(p, skb);
 		if (maclen == ETH_HLEN)
@@ -5652,7 +5654,7 @@ static void napi_reuse_skb(struct napi_struct *napi, struct sk_buff *skb)
 	__skb_pull(skb, skb_headlen(skb));
 	/* restore the reserve we had after netdev_alloc_skb_ip_align() */
 	skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN - skb_headroom(skb));
-	skb->vlan_tci = 0;
+	__vlan_hwaccel_clear_tag(skb);
 	skb->dev = napi->dev;
 	skb->skb_iif = 0;
 	skb->encapsulation = 0;
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index b4ee5c8b928f..5bb5eb500605 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -5123,7 +5123,7 @@ int skb_vlan_pop(struct sk_buff *skb)
 	int err;
 
 	if (likely(skb_vlan_tag_present(skb))) {
-		skb->vlan_tci = 0;
+		__vlan_hwaccel_clear_tag(skb);
 	} else {
 		if (unlikely(!eth_type_vlan(skb->protocol)))
 			return 0;
diff --git a/net/sched/act_vlan.c b/net/sched/act_vlan.c
index ba677d54a7af..93fdaf707313 100644
--- a/net/sched/act_vlan.c
+++ b/net/sched/act_vlan.c
@@ -63,7 +63,7 @@ static int tcf_vlan_act(struct sk_buff *skb, const struct tc_action *a,
 		/* extract existing tag (and guarantee no hw-accel tag) */
 		if (skb_vlan_tag_present(skb)) {
 			tci = skb_vlan_tag_get(skb);
-			skb->vlan_tci = 0;
+			__vlan_hwaccel_clear_tag(skb);
 		} else {
 			/* in-payload vlan tag, pop it */
 			err = __skb_vlan_pop(skb, &tci);
-- 
2.19.1

[PATCH net-next 4/9] 8021q: use __vlan_hwaccel helpers

[Michał Mirosław]

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
---
 net/8021q/vlan_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c
index 4f60e86f4b8d..dd39489c829a 100644
--- a/net/8021q/vlan_core.c
+++ b/net/8021q/vlan_core.c
@@ -57,7 +57,7 @@ bool vlan_do_receive(struct sk_buff **skbp)
 	}
 
 	skb->priority = vlan_get_ingress_priority(vlan_dev, skb->vlan_tci);
-	skb->vlan_tci = 0;
+	__vlan_hwaccel_clear_tag(skb);
 
 	rx_stats = this_cpu_ptr(vlan_dev_priv(vlan_dev)->vlan_pcpu_stats);
 
-- 
2.19.1

[PATCH net-next 5/9] bridge: use __vlan_hwaccel helpers

[Michał Mirosław]

This removes assumption than vlan_tci != 0 when tag is present.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
---
 net/bridge/br_netfilter_hooks.c | 15 +++++++++------
 net/bridge/br_private.h         |  2 +-
 net/bridge/br_vlan.c            |  6 +++---
 3 files changed, 13 insertions(+), 10 deletions(-)

diff --git a/net/bridge/br_netfilter_hooks.c b/net/bridge/br_netfilter_hooks.c
index b1b5e8516724..c9383c470a83 100644
--- a/net/bridge/br_netfilter_hooks.c
+++ b/net/bridge/br_netfilter_hooks.c
@@ -671,10 +671,8 @@ static int br_nf_push_frag_xmit(struct net *net, struct sock *sk, struct sk_buff
 		return 0;
 	}
 
-	if (data->vlan_tci) {
-		skb->vlan_tci = data->vlan_tci;
-		skb->vlan_proto = data->vlan_proto;
-	}
+	if (data->vlan_proto)
+		__vlan_hwaccel_put_tag(skb, data->vlan_proto, data->vlan_tci);
 
 	skb_copy_to_linear_data_offset(skb, -data->size, data->mac, data->size);
 	__skb_push(skb, data->encap_size);
@@ -740,8 +738,13 @@ static int br_nf_dev_queue_xmit(struct net *net, struct sock *sk, struct sk_buff
 
 		data = this_cpu_ptr(&brnf_frag_data_storage);
 
-		data->vlan_tci = skb->vlan_tci;
-		data->vlan_proto = skb->vlan_proto;
+		if (skb_vlan_tag_present(skb)) {
+			data->vlan_tci = skb->vlan_tci;
+			data->vlan_proto = skb->vlan_proto;
+		} else {
+			data->vlan_proto = 0;
+		}
+
 		data->encap_size = nf_bridge_encap_header_len(skb);
 		data->size = ETH_HLEN + data->encap_size;
 
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 2920e06a5403..67105c66584a 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -905,7 +905,7 @@ static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
 	int err = 0;
 
 	if (skb_vlan_tag_present(skb)) {
-		*vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
+		*vid = skb_vlan_tag_get_id(skb);
 	} else {
 		*vid = 0;
 		err = -EINVAL;
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
index 8c9297a01947..a7e869da21bf 100644
--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -420,7 +420,7 @@ struct sk_buff *br_handle_vlan(struct net_bridge *br,
 	}
 
 	if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
-		skb->vlan_tci = 0;
+		__vlan_hwaccel_clear_tag(skb);
 
 	if (p && (p->flags & BR_VLAN_TUNNEL) &&
 	    br_handle_egress_vlan_tunnel(skb, v)) {
@@ -493,8 +493,8 @@ static bool __allowed_ingress(const struct net_bridge *br,
 			__vlan_hwaccel_put_tag(skb, br->vlan_proto, pvid);
 		else
 			/* Priority-tagged Frame.
-			 * At this point, We know that skb->vlan_tci had
-			 * VLAN_TAG_PRESENT bit and its VID field was 0x000.
+			 * At this point, we know that skb->vlan_tci VID
+			 * field was 0.
 			 * We update only VID field and preserve PCP field.
 			 */
 			skb->vlan_tci |= pvid;
-- 
2.19.1

[PATCH net-next 6/9] ipv4/tunnel: use __vlan_hwaccel helpers

[Michał Mirosław]

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
---
 net/ipv4/ip_tunnel_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index dde671e97829..f45b96d715f0 100644
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -120,7 +120,7 @@ int __iptunnel_pull_header(struct sk_buff *skb, int hdr_len,
 	}
 
 	skb_clear_hash_if_not_l4(skb);
-	skb->vlan_tci = 0;
+	__vlan_hwaccel_clear_tag(skb);
 	skb_set_queue_mapping(skb, 0);
 	skb_scrub_packet(skb, xnet);
 
-- 
2.19.1

[PATCH net-next 7/9] benet: use __vlan_hwaccel helpers

[Michał Mirosław]

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
---
 drivers/net/ethernet/emulex/benet/be_main.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index c5ad7a4f4d83..80b2bd3747ce 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -1049,30 +1049,35 @@ static struct sk_buff *be_insert_vlan_in_pkt(struct be_adapter *adapter,
 					     struct be_wrb_params
 					     *wrb_params)
 {
+	bool insert_vlan = false;
 	u16 vlan_tag = 0;
 
 	skb = skb_share_check(skb, GFP_ATOMIC);
 	if (unlikely(!skb))
 		return skb;
 
-	if (skb_vlan_tag_present(skb))
+	if (skb_vlan_tag_present(skb)) {
 		vlan_tag = be_get_tx_vlan_tag(adapter, skb);
+		insert_vlan = true;
+	}
 
 	if (qnq_async_evt_rcvd(adapter) && adapter->pvid) {
-		if (!vlan_tag)
+		if (!insert_vlan) {
 			vlan_tag = adapter->pvid;
+			insert_vlan = true;
+		}
 		/* f/w workaround to set skip_hw_vlan = 1, informs the F/W to
 		 * skip VLAN insertion
 		 */
 		BE_WRB_F_SET(wrb_params->features, VLAN_SKIP_HW, 1);
 	}
 
-	if (vlan_tag) {
+	if (insert_vlan) {
 		skb = vlan_insert_tag_set_proto(skb, htons(ETH_P_8021Q),
 						vlan_tag);
 		if (unlikely(!skb))
 			return skb;
-		skb->vlan_tci = 0;
+		__vlan_hwaccel_clear_tag(skb);
 	}
 
 	/* Insert the outer VLAN, if any */
-- 
2.19.1

[PATCH net-next 8/9] mlx4: use __vlan_hwaccel helpers

[Michał Mirosław]

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
---
 drivers/net/ethernet/mellanox/mlx4/en_rx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
index db00bf1c23f5..fd09ba98c0a6 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
@@ -875,7 +875,7 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
 			skb->data_len = length;
 			napi_gro_frags(&cq->napi);
 		} else {
-			skb->vlan_tci = 0;
+			__vlan_hwaccel_clear_tag(skb);
 			skb_clear_hash(skb);
 		}
 next:
-- 
2.19.1

[PATCH net-next 9/9] sky2: use __vlan_hwaccel helpers

[Michał Mirosław]

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
---
 drivers/net/ethernet/marvell/sky2.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
index 697d9b374f5e..c7cd0081058e 100644
--- a/drivers/net/ethernet/marvell/sky2.c
+++ b/drivers/net/ethernet/marvell/sky2.c
@@ -2485,13 +2485,11 @@ static struct sk_buff *receive_copy(struct sky2_port *sky2,
 		skb->ip_summed = re->skb->ip_summed;
 		skb->csum = re->skb->csum;
 		skb_copy_hash(skb, re->skb);
-		skb->vlan_proto = re->skb->vlan_proto;
-		skb->vlan_tci = re->skb->vlan_tci;
+		__vlan_hwaccel_copy_tag(skb, re->skb);
 
 		pci_dma_sync_single_for_device(sky2->hw->pdev, re->data_addr,
 					       length, PCI_DMA_FROMDEVICE);
-		re->skb->vlan_proto = 0;
-		re->skb->vlan_tci = 0;
+		__vlan_hwaccel_clear_tag(re->skb);
 		skb_clear_hash(re->skb);
 		re->skb->ip_summed = CHECKSUM_NONE;
 		skb_put(skb, length);
-- 
2.19.1

Re: [PATCH net-next 0/9] Use __vlan_hwaccel_*() helpers

[David Miller]

From: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Date: Fri, 09 Nov 2018 00:17:58 +0100

> This series removes from networking core and driver code an assumption
> about how VLAN tag presence is stored in an skb. This will allow to free
> up overloading of VLAN.CFI bit to incidate tag's presence.

This looks good, series applied.

Thanks.

Re: [PATCH net-next 0/9] Use __vlan_hwaccel_*() helpers

[Tariq Toukan]

On 09/11/2018 6:45 AM, David Miller wrote:
> From: Michał Mirosław <mirq-linux@rere.qmqm.pl>
> Date: Fri, 09 Nov 2018 00:17:58 +0100
> 
>> This series removes from networking core and driver code an assumption
>> about how VLAN tag presence is stored in an skb. This will allow to free
>> up overloading of VLAN.CFI bit to incidate tag's presence.
> 
> This looks good, series applied.
> 
> Thanks.
> 

Hi Michal,

We started seeing the compilation errors below, they look related to 
this series.

Thanks,
Tariq

02:15:09 net/8021q/vlan_core.c: In function 'vlan_do_receive':
02:15:09 net/8021q/vlan_core.c:60:2: error: implicit declaration of 
function '__vlan_hwaccel_clear_tag'; did you mean 
'__vlan_hwaccel_get_tag'? [-Werror=implicit-function-declaration]
02:15:09   __vlan_hwaccel_clear_tag(skb);
02:15:09   ^~~~~~~~~~~~~~~~~~~~~~~~
02:15:09   __vlan_hwaccel_get_tag
02:15:09 cc1: some warnings being treated as errors
02:15:09 make[4]: *** [scripts/Makefile.build:293: 
net/8021q/vlan_core.o] Error 1
02:15:09 make[4]: *** Waiting for unfinished jobs....
02:15:11 make[3]: *** [scripts/Makefile.build:518: net/8021q] Error 2
02:15:11 make[3]: *** Waiting for unfinished jobs....
02:15:14 make[2]: *** [Makefile:1060: net] Error 2
02:15:14 make[2]: *** Waiting for unfinished jobs....
02:15:36 drivers/net/ethernet/mellanox/mlx4/en_rx.c: In function 
'mlx4_en_process_rx_cq':
02:15:36 drivers/net/ethernet/mellanox/mlx4/en_rx.c:878:4: error: 
implicit declaration of function '__vlan_hwaccel_clear_tag'; did you 
mean '__vlan_hwaccel_get_tag'? [-Werror=implicit-function-declaration]
02:15:36     __vlan_hwaccel_clear_tag(skb);
02:15:36     ^~~~~~~~~~~~~~~~~~~~~~~~
02:15:36     __vlan_hwaccel_get_tag
02:15:36 cc1: some warnings being treated as errors
02:15:37 make[7]: *** [scripts/Makefile.build:293: 
drivers/net/ethernet/mellanox/mlx4/en_rx.o] Error 1
02:15:37 make[7]: *** Waiting for unfinished jobs....
02:15:37 make[6]: *** [scripts/Makefile.build:518: 
drivers/net/ethernet/mellanox/mlx4] Error 2
02:15:37 make[6]: *** Waiting for unfinished jobs....
02:15:39 drivers/net/ethernet/mellanox/mlx5/core/en_stats.c: In function 
'mlx5e_grp_sw_update_stats':
02:15:39 drivers/net/ethernet/mellanox/mlx5/core/en_stats.c:216:1: 
warning: the frame size of 1200 bytes is larger than 1024 bytes 
[-Wframe-larger-than=]
02:15:39  }
02:15:39  ^
02:15:49 make[5]: *** [scripts/Makefile.build:518: 
drivers/net/ethernet/mellanox] Error 2
02:15:49 make[4]: *** [scripts/Makefile.build:518: drivers/net/ethernet] 
Error 2
02:15:49 make[3]: *** [scripts/Makefile.build:518: drivers/net] Error 2
02:15:49 make[2]: *** [Makefile:1060: drivers] Error 2
02:15:49 make[1]: *** [scripts/package/Makefile:63: binrpm-pkg] Error 2
02:15:49 make: *** [Makefile:1399: binrpm-pkg] Error 2

Re: [PATCH net-next 0/9] Use __vlan_hwaccel_*() helpers

[mirq-linux]

On Sun, Nov 11, 2018 at 03:26:29PM +0000, Tariq Toukan wrote:
> 
> 
> On 09/11/2018 6:45 AM, David Miller wrote:
> > From: Michał Mirosław <mirq-linux@rere.qmqm.pl>
> > Date: Fri, 09 Nov 2018 00:17:58 +0100
> > 
> >> This series removes from networking core and driver code an assumption
> >> about how VLAN tag presence is stored in an skb. This will allow to free
> >> up overloading of VLAN.CFI bit to incidate tag's presence.
> > 
> > This looks good, series applied.
> > 
> > Thanks.
> > 
> 
> Hi Michal,
> 
> We started seeing the compilation errors below, they look related to 
> this series.

Do you have the previous series applied that introduced __vlan_hwaccel_clear_tag()?
It was applied to net-next before I sent this series.

I did a allmodconfig build of net-next and saw no failures (apart from
OVS that is fixed already).

Best Regards,
Michał Mirosław

Re: [PATCH net-next 0/9] Use __vlan_hwaccel_*() helpers

[mirq-linux]

On Sun, Nov 11, 2018 at 05:12:43PM +0100, mirq-linux@rere.qmqm.pl wrote:
> On Sun, Nov 11, 2018 at 03:26:29PM +0000, Tariq Toukan wrote:
> > On 09/11/2018 6:45 AM, David Miller wrote:
> > > From: Michał Mirosław <mirq-linux@rere.qmqm.pl>
> > > Date: Fri, 09 Nov 2018 00:17:58 +0100
> > >> This series removes from networking core and driver code an assumption
> > >> about how VLAN tag presence is stored in an skb. This will allow to free
> > >> up overloading of VLAN.CFI bit to incidate tag's presence.
> > > 
> > > This looks good, series applied.
> > > 
> > > Thanks.
> > Hi Michal,
> > 
> > We started seeing the compilation errors below, they look related to 
> > this series.
> 
> Do you have the previous series applied that introduced __vlan_hwaccel_clear_tag()?
> It was applied to net-next before I sent this series.
> 
> I did a allmodconfig build of net-next and saw no failures (apart from
> OVS that is fixed already).

The prerequisite commit in net-next is:

7025abb2e447b ("Merge branch 'vlan-prepare-for-removal-of-VLAN_TAG_PRESENT'")

Best Regards,
Michał Mirosław