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[2a01:c22:72f1:1900:5c1e:d798:1e97:a293]) by smtp.googlemail.com with ESMTPSA id m7-20020a5d64a7000000b0034a710b6360sm28685651wrp.6.2024.04.30.01.17.31 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 30 Apr 2024 01:17:32 -0700 (PDT) Message-ID: <1ed5b8cb-c79b-44b9-8dbe-f78d7505b3b4@gmail.com> Date: Tue, 30 Apr 2024 10:17:31 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net-next] net: phy: Don't conditionally compile the phy_link_topology creation To: Maxime Chevallier , davem@davemloft.net Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com, Andrew Lunn , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Russell King , linux-arm-kernel@lists.infradead.org, Christophe Leroy , Herve Codina , Florian Fainelli , Vladimir Oltean , =?UTF-8?Q?K=C3=B6ry_Maincent?= , Jesse Brandeburg , =?UTF-8?Q?Marek_Beh=C3=BAn?= , Piergiorgio Beruto , Oleksij Rempel , =?UTF-8?Q?Nicol=C3=B2_Veronese?= , Simon Horman , mwojtas@chromium.org, Nathan Chancellor , Antoine Tenart References: <20240429131008.439231-1-maxime.chevallier@bootlin.com> Content-Language: en-US From: Heiner Kallweit Autocrypt: addr=hkallweit1@gmail.com; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 29.04.2024 15:10, Maxime Chevallier wrote: > 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. > The change fixes the issue for me, but according to my personal taste the code isn't intuitive and still error-prone. Also there's no good reason to inline a function like phy_link_topo_create() and make it publicly available. Do you expect it to be ever used outside net core? In general it may make sense to add a config symbol for the topology extension, there seem to be very few, specialized use cases for it. > Signed-off-by: Maxime Chevallier > 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 > #include > > -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 > > -#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 */ _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel