[PATCH net-next] net: phy: Don't conditionally compile the phy_link_topology creation

[Maxime Chevallier]

The core of the phy_link_topology isn't directly tied to phylib, and at
the moment it's initialized, phylib might not be loaded yet. Move the
initialization of the topology to the phy_link_topology_core header,
which contains the bare minimum so that we can initialize it at netdev
creation.

Signed-off-by: Maxime Chevallier <maxime.chevallier at bootlin.com>
Closes: https://lore.kernel.org/netdev/2e11b89d-100f-49e7-9c9a-834cc0b82f97@gmail.com/
Closes: https://lore.kernel.org/netdev/20240409201553.GA4124869@dev-arch.thelio-3990X/
---
 drivers/net/phy/phy_link_topology.c    | 23 --------------------
 include/linux/phy_link_topology.h      |  5 -----
 include/linux/phy_link_topology_core.h | 30 +++++++++++++++++---------
 3 files changed, 20 insertions(+), 38 deletions(-)

diff --git a/drivers/net/phy/phy_link_topology.c b/drivers/net/phy/phy_link_topology.c
index 985941c5c558..960aedd73308 100644
--- a/drivers/net/phy/phy_link_topology.c
+++ b/drivers/net/phy/phy_link_topology.c
@@ -12,29 +12,6 @@
 #include <linux/rtnetlink.h>
 #include <linux/xarray.h>
 
-struct phy_link_topology *phy_link_topo_create(struct net_device *dev)
-{
-	struct phy_link_topology *topo;
-
-	topo = kzalloc(sizeof(*topo), GFP_KERNEL);
-	if (!topo)
-		return ERR_PTR(-ENOMEM);
-
-	xa_init_flags(&topo->phys, XA_FLAGS_ALLOC1);
-	topo->next_phy_index = 1;
-
-	return topo;
-}
-
-void phy_link_topo_destroy(struct phy_link_topology *topo)
-{
-	if (!topo)
-		return;
-
-	xa_destroy(&topo->phys);
-	kfree(topo);
-}
-
 int phy_link_topo_add_phy(struct phy_link_topology *topo,
 			  struct phy_device *phy,
 			  enum phy_upstream upt, void *upstream)
diff --git a/include/linux/phy_link_topology.h b/include/linux/phy_link_topology.h
index 6b79feb607e7..ad72d7881257 100644
--- a/include/linux/phy_link_topology.h
+++ b/include/linux/phy_link_topology.h
@@ -32,11 +32,6 @@ struct phy_device_node {
 	struct phy_device *phy;
 };
 
-struct phy_link_topology {
-	struct xarray phys;
-	u32 next_phy_index;
-};
-
 static inline struct phy_device *
 phy_link_topo_get_phy(struct phy_link_topology *topo, u32 phyindex)
 {
diff --git a/include/linux/phy_link_topology_core.h b/include/linux/phy_link_topology_core.h
index 0a6479055745..0116ec49cd1b 100644
--- a/include/linux/phy_link_topology_core.h
+++ b/include/linux/phy_link_topology_core.h
@@ -2,24 +2,34 @@
 #ifndef __PHY_LINK_TOPOLOGY_CORE_H
 #define __PHY_LINK_TOPOLOGY_CORE_H
 
-struct phy_link_topology;
+#include <linux/xarray.h>
 
-#if IS_REACHABLE(CONFIG_PHYLIB)
-
-struct phy_link_topology *phy_link_topo_create(struct net_device *dev);
-void phy_link_topo_destroy(struct phy_link_topology *topo);
-
-#else
+struct phy_link_topology {
+	struct xarray phys;
+	u32 next_phy_index;
+};
 
 static inline struct phy_link_topology *phy_link_topo_create(struct net_device *dev)
 {
-	return NULL;
+	struct phy_link_topology *topo;
+
+	topo = kzalloc(sizeof(*topo), GFP_KERNEL);
+	if (!topo)
+		return ERR_PTR(-ENOMEM);
+
+	xa_init_flags(&topo->phys, XA_FLAGS_ALLOC1);
+	topo->next_phy_index = 1;
+
+	return topo;
 }
 
 static inline void phy_link_topo_destroy(struct phy_link_topology *topo)
 {
-}
+	if (!topo)
+		return;
 
-#endif
+	xa_destroy(&topo->phys);
+	kfree(topo);
+}
 
 #endif /* __PHY_LINK_TOPOLOGY_CORE_H */
-- 
2.44.0