cxgb4: Rename sched_class to avoid type clash

drivers/net/ethernet/chelsio/cxgb4/sched.h declares a sched_class
struct which has a type name clash with struct sched_class
in kernel/sched/sched.h (a type used in a field in task_struct).

When cxgb4 is a builtin we end up with both sched_class types,
and as a result of this we wind up with DWARF (and derived from
that BTF) with a duplicate incorrect task_struct representation.
When cxgb4 is built-in this type clash can cause kernel builds to
fail as resolve_btfids will fail when confused which task_struct
to use. See [1] for more details.

As such, renaming sched_class to ch_sched_class (in line with
other structs like ch_sched_flowc) makes sense.

[1] https://lore.kernel.org/bpf/2412725b-916c-47bd-91c3-c2d57e3e6c7b@acm.org/

Reported-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Acked-by: Potnuri Bharat Teja <bharat@chelsio.com>
Link: https://patch.msgid.link/20251121181231.64337-1-alan.maguire@oracle.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

5 files changed, 32 insertions, 32 deletions

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index 7e2283c95b97..66b8854e059f 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -3485,7 +3485,7 @@ static int cxgb_set_tx_maxrate(struct net_device *dev, int index, u32 rate)
 	struct adapter *adap = pi->adapter;
 	struct ch_sched_queue qe = { 0 };
 	struct ch_sched_params p = { 0 };
-	struct sched_class *e;
+	struct ch_sched_class *e;
 	u32 req_rate;
 	int err = 0;
 
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_matchall.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_matchall.c
index 1672d3afe5be..f8dcf0b4abcd 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_matchall.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_matchall.c
@@ -56,7 +56,7 @@ static int cxgb4_matchall_egress_validate(struct net_device *dev,
 	struct port_info *pi = netdev2pinfo(dev);
 	struct flow_action_entry *entry;
 	struct ch_sched_queue qe;
-	struct sched_class *e;
+	struct ch_sched_class *e;
 	u64 max_link_rate;
 	u32 i, speed;
 	int ret;
@@ -180,7 +180,7 @@ static int cxgb4_matchall_alloc_tc(struct net_device *dev,
 	struct port_info *pi = netdev2pinfo(dev);
 	struct adapter *adap = netdev2adap(dev);
 	struct flow_action_entry *entry;
-	struct sched_class *e;
+	struct ch_sched_class *e;
 	int ret;
 	u32 i;
 
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_mqprio.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_mqprio.c
index 338b04f339b3..a2dcd2e24263 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_mqprio.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_mqprio.c
@@ -330,7 +330,7 @@ static int cxgb4_mqprio_alloc_tc(struct net_device *dev,
 	struct cxgb4_tc_port_mqprio *tc_port_mqprio;
 	struct port_info *pi = netdev2pinfo(dev);
 	struct adapter *adap = netdev2adap(dev);
-	struct sched_class *e;
+	struct ch_sched_class *e;
 	int ret;
 	u8 i;
 
diff --git a/drivers/net/ethernet/chelsio/cxgb4/sched.c b/drivers/net/ethernet/chelsio/cxgb4/sched.c
index a1b14468d1ff..38a30aeee122 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/sched.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/sched.c
@@ -44,7 +44,7 @@ static int t4_sched_class_fw_cmd(struct port_info *pi,
 {
 	struct adapter *adap = pi->adapter;
 	struct sched_table *s = pi->sched_tbl;
-	struct sched_class *e;
+	struct ch_sched_class *e;
 	int err = 0;
 
 	e = &s->tab[p->u.params.class];
@@ -122,7 +122,7 @@ static void *t4_sched_entry_lookup(struct port_info *pi,
 				   const u32 val)
 {
 	struct sched_table *s = pi->sched_tbl;
-	struct sched_class *e, *end;
+	struct ch_sched_class *e, *end;
 	void *found = NULL;
 
 	/* Look for an entry with matching @val */
@@ -166,8 +166,8 @@ static void *t4_sched_entry_lookup(struct port_info *pi,
 	return found;
 }
 
-struct sched_class *cxgb4_sched_queue_lookup(struct net_device *dev,
-					     struct ch_sched_queue *p)
+struct ch_sched_class *cxgb4_sched_queue_lookup(struct net_device *dev,
+						struct ch_sched_queue *p)
 {
 	struct port_info *pi = netdev2pinfo(dev);
 	struct sched_queue_entry *qe = NULL;
@@ -187,7 +187,7 @@ static int t4_sched_queue_unbind(struct port_info *pi, struct ch_sched_queue *p)
 	struct sched_queue_entry *qe = NULL;
 	struct adapter *adap = pi->adapter;
 	struct sge_eth_txq *txq;
-	struct sched_class *e;
+	struct ch_sched_class *e;
 	int err = 0;
 
 	if (p->queue < 0 || p->queue >= pi->nqsets)
@@ -218,7 +218,7 @@ static int t4_sched_queue_bind(struct port_info *pi, struct ch_sched_queue *p)
 	struct sched_queue_entry *qe = NULL;
 	struct adapter *adap = pi->adapter;
 	struct sge_eth_txq *txq;
-	struct sched_class *e;
+	struct ch_sched_class *e;
 	unsigned int qid;
 	int err = 0;
 
@@ -260,7 +260,7 @@ static int t4_sched_flowc_unbind(struct port_info *pi, struct ch_sched_flowc *p)
 {
 	struct sched_flowc_entry *fe = NULL;
 	struct adapter *adap = pi->adapter;
-	struct sched_class *e;
+	struct ch_sched_class *e;
 	int err = 0;
 
 	if (p->tid < 0 || p->tid >= adap->tids.neotids)
@@ -288,7 +288,7 @@ static int t4_sched_flowc_bind(struct port_info *pi, struct ch_sched_flowc *p)
 	struct sched_table *s = pi->sched_tbl;
 	struct sched_flowc_entry *fe = NULL;
 	struct adapter *adap = pi->adapter;
-	struct sched_class *e;
+	struct ch_sched_class *e;
 	int err = 0;
 
 	if (p->tid < 0 || p->tid >= adap->tids.neotids)
@@ -322,7 +322,7 @@ out_err:
 }
 
 static void t4_sched_class_unbind_all(struct port_info *pi,
-				      struct sched_class *e,
+				      struct ch_sched_class *e,
 				      enum sched_bind_type type)
 {
 	if (!e)
@@ -476,12 +476,12 @@ int cxgb4_sched_class_unbind(struct net_device *dev, void *arg,
 }
 
 /* If @p is NULL, fetch any available unused class */
-static struct sched_class *t4_sched_class_lookup(struct port_info *pi,
-						const struct ch_sched_params *p)
+static struct ch_sched_class *t4_sched_class_lookup(struct port_info *pi,
+						    const struct ch_sched_params *p)
 {
 	struct sched_table *s = pi->sched_tbl;
-	struct sched_class *found = NULL;
-	struct sched_class *e, *end;
+	struct ch_sched_class *found = NULL;
+	struct ch_sched_class *e, *end;
 
 	if (!p) {
 		/* Get any available unused class */
@@ -522,10 +522,10 @@ static struct sched_class *t4_sched_class_lookup(struct port_info *pi,
 	return found;
 }
 
-static struct sched_class *t4_sched_class_alloc(struct port_info *pi,
-						struct ch_sched_params *p)
+static struct ch_sched_class *t4_sched_class_alloc(struct port_info *pi,
+						   struct ch_sched_params *p)
 {
-	struct sched_class *e = NULL;
+	struct ch_sched_class *e = NULL;
 	u8 class_id;
 	int err;
 
@@ -579,8 +579,8 @@ static struct sched_class *t4_sched_class_alloc(struct port_info *pi,
  * scheduling class with matching @p is found, then the matching class is
  * returned.
  */
-struct sched_class *cxgb4_sched_class_alloc(struct net_device *dev,
-					    struct ch_sched_params *p)
+struct ch_sched_class *cxgb4_sched_class_alloc(struct net_device *dev,
+					       struct ch_sched_params *p)
 {
 	struct port_info *pi = netdev2pinfo(dev);
 	u8 class_id;
@@ -607,7 +607,7 @@ void cxgb4_sched_class_free(struct net_device *dev, u8 classid)
 	struct port_info *pi = netdev2pinfo(dev);
 	struct sched_table *s = pi->sched_tbl;
 	struct ch_sched_params p;
-	struct sched_class *e;
+	struct ch_sched_class *e;
 	u32 speed;
 	int ret;
 
@@ -640,7 +640,7 @@ void cxgb4_sched_class_free(struct net_device *dev, u8 classid)
 	}
 }
 
-static void t4_sched_class_free(struct net_device *dev, struct sched_class *e)
+static void t4_sched_class_free(struct net_device *dev, struct ch_sched_class *e)
 {
 	struct port_info *pi = netdev2pinfo(dev);
 
@@ -660,7 +660,7 @@ struct sched_table *t4_init_sched(unsigned int sched_size)
 	s->sched_size = sched_size;
 
 	for (i = 0; i < s->sched_size; i++) {
-		memset(&s->tab[i], 0, sizeof(struct sched_class));
+		memset(&s->tab[i], 0, sizeof(struct ch_sched_class));
 		s->tab[i].idx = i;
 		s->tab[i].state = SCHED_STATE_UNUSED;
 		INIT_LIST_HEAD(&s->tab[i].entry_list);
@@ -682,7 +682,7 @@ void t4_cleanup_sched(struct adapter *adap)
 			continue;
 
 		for (i = 0; i < s->sched_size; i++) {
-			struct sched_class *e;
+			struct ch_sched_class *e;
 
 			e = &s->tab[i];
 			if (e->state == SCHED_STATE_ACTIVE)
diff --git a/drivers/net/ethernet/chelsio/cxgb4/sched.h b/drivers/net/ethernet/chelsio/cxgb4/sched.h
index 6b3c778815f0..4d3b5a757536 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/sched.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/sched.h
@@ -71,7 +71,7 @@ struct sched_flowc_entry {
 	struct ch_sched_flowc param;
 };
 
-struct sched_class {
+struct ch_sched_class {
 	u8 state;
 	u8 idx;
 	struct ch_sched_params info;
@@ -82,7 +82,7 @@ struct sched_class {
 
 struct sched_table {      /* per port scheduling table */
 	u8 sched_size;
-	struct sched_class tab[] __counted_by(sched_size);
+	struct ch_sched_class tab[] __counted_by(sched_size);
 };
 
 static inline bool can_sched(struct net_device *dev)
@@ -103,15 +103,15 @@ static inline bool valid_class_id(struct net_device *dev, u8 class_id)
 	return true;
 }
 
-struct sched_class *cxgb4_sched_queue_lookup(struct net_device *dev,
-					     struct ch_sched_queue *p);
+struct ch_sched_class *cxgb4_sched_queue_lookup(struct net_device *dev,
+						struct ch_sched_queue *p);
 int cxgb4_sched_class_bind(struct net_device *dev, void *arg,
 			   enum sched_bind_type type);
 int cxgb4_sched_class_unbind(struct net_device *dev, void *arg,
 			     enum sched_bind_type type);
 
-struct sched_class *cxgb4_sched_class_alloc(struct net_device *dev,
-					    struct ch_sched_params *p);
+struct ch_sched_class *cxgb4_sched_class_alloc(struct net_device *dev,
+					       struct ch_sched_params *p);
 void cxgb4_sched_class_free(struct net_device *dev, u8 classid);
 
 struct sched_table *t4_init_sched(unsigned int size);