The atmdev_ops::send_oam device operation and the atm_vcc::push_oam
callback were the kernel's interface for raw F4/F5 OAM cell exchange.
Nothing assigns them a non-NULL value and nothing ever invokes them:
the core only ever initialises push_oam to NULL (in vcc_create() and the
AAL init helpers) and the Solos driver only lists send_oam = NULL for
documentation. The drivers that actually drove OAM through these hooks
were removed along with the legacy ATM adapters.

Drop both callbacks and the NULL initialisers.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 include/linux/atmdev.h  | 8 --------
 drivers/atm/solos-pci.c | 1 -
 net/atm/common.c        | 1 -
 net/atm/raw.c           | 2 --
 4 files changed, 12 deletions(-)

diff --git a/include/linux/atmdev.h b/include/linux/atmdev.h
index 82a32526df64..71c5bf6950e3 100644
--- a/include/linux/atmdev.h
+++ b/include/linux/atmdev.h
@@ -104,7 +104,6 @@ struct atm_vcc {
 	void (*release_cb)(struct atm_vcc *vcc); /* release_sock callback */
 	void (*push)(struct atm_vcc *vcc,struct sk_buff *skb);
 	void (*pop)(struct atm_vcc *vcc,struct sk_buff *skb); /* optional */
-	int (*push_oam)(struct atm_vcc *vcc,void *cell);
 	int (*send)(struct atm_vcc *vcc,struct sk_buff *skb);
 	void		*dev_data;	/* per-device data */
 	void		*proto_data;	/* per-protocol data */
@@ -170,12 +169,6 @@ struct atm_dev {
 	struct list_head dev_list;	/* linkage */
 };
 
- 
-/* OF: send_Oam Flags */
-
-#define ATM_OF_IMMED  1		/* Attempt immediate delivery */
-#define ATM_OF_INRATE 2		/* Attempt in-rate delivery */
-
 struct atmdev_ops { /* only send is required */
 	void (*dev_close)(struct atm_dev *dev);
 	int (*open)(struct atm_vcc *vcc);
@@ -188,7 +181,6 @@ struct atmdev_ops { /* only send is required */
 	int (*pre_send)(struct atm_vcc *vcc, struct sk_buff *skb);
 	int (*send)(struct atm_vcc *vcc,struct sk_buff *skb);
 	int (*send_bh)(struct atm_vcc *vcc, struct sk_buff *skb);
-	int (*send_oam)(struct atm_vcc *vcc,void *cell,int flags);
 	void (*phy_put)(struct atm_dev *dev,unsigned char value,
 	    unsigned long addr);
 	unsigned char (*phy_get)(struct atm_dev *dev,unsigned long addr);
diff --git a/drivers/atm/solos-pci.c b/drivers/atm/solos-pci.c
index bcb1353877e4..4ad170a858ee 100644
--- a/drivers/atm/solos-pci.c
+++ b/drivers/atm/solos-pci.c
@@ -1180,7 +1180,6 @@ static const struct atmdev_ops fpga_ops = {
 	.close =	pclose,
 	.ioctl =	NULL,
 	.send =		psend,
-	.send_oam =	NULL,
 	.phy_put =	NULL,
 	.phy_get =	NULL,
 	.change_qos =	NULL,
diff --git a/net/atm/common.c b/net/atm/common.c
index 913f7e32ce41..c6e87fc9bbfc 100644
--- a/net/atm/common.c
+++ b/net/atm/common.c
@@ -163,7 +163,6 @@ int vcc_create(struct net *net, struct socket *sock, int protocol, int family, i
 	vcc->push = NULL;
 	vcc->pop = NULL;
 	vcc->owner = NULL;
-	vcc->push_oam = NULL;
 	vcc->release_cb = NULL;
 	vcc->vpi = vcc->vci = 0; /* no VCI/VPI yet */
 	vcc->atm_options = vcc->aal_options = 0;
diff --git a/net/atm/raw.c b/net/atm/raw.c
index 0d36aeb3671b..1d6ac7b0c4e5 100644
--- a/net/atm/raw.c
+++ b/net/atm/raw.c
@@ -63,7 +63,6 @@ int atm_init_aal0(struct atm_vcc *vcc)
 {
 	vcc->push = atm_push_raw;
 	vcc->pop = atm_pop_raw;
-	vcc->push_oam = NULL;
 	vcc->send = atm_send_aal0;
 	return 0;
 }
@@ -72,7 +71,6 @@ int atm_init_aal5(struct atm_vcc *vcc)
 {
 	vcc->push = atm_push_raw;
 	vcc->pop = atm_pop_raw;
-	vcc->push_oam = NULL;
 	if (vcc->dev->ops->send_bh)
 		vcc->send = vcc->dev->ops->send_bh;
 	else
-- 
2.54.0