phy_caps_lo...linkmode_rev(9)

🌸 NAME 🌸

okay so welcome to the phy_caps_lo...linkmode_rev(9) page in the Kernel API Manual, bestie. This one is all about phy_caps_lookup_by_linkmode_rev — the function whose whole job is to look up the slowest matching link_capabilities. That's it. That's the assignment. iconic 💅✨

✨ SYNOPSIS ✨

const struct link_capabilities * phy_caps_lookup_by_linkmode_rev (const
       unsigned long *linkmodes , bool fdx_only );

💅 ARGUMENTS 💅

• linkmodes — the linkmodes to match against. matching energy only, no cap 🎀
• fdx_only — full duplex match only when set. so when it's set, bestie, it's full-duplex-only hours 🦋

🔥 RETURN 🔥

It returns the lowest-speed link_capabilities that intersects the given linkmodes. When set, fdx_only will ignore half-duplex matches. And if there's no match? NULL is returned. no match, no vibes, just NULL 😭💀

👑 SEE ALSO 👑

Kernel file ./drivers/net/phy/phy_caps.c — and the whole bestie crew is right here:

• phy_caps_init(9)
• phy_caps_speeds(9)
• phy_caps_lookup_by_linkmode(9)
• phy_caps_lookup(9)
• phy_caps_linkmode_max_speed(9)
• phy_caps_valid(9)
• phy_caps_linkmodes(9)
• phy_caps_from_interface(9)
• phy_caps_medium_get_supported(9)
• phy_caps_mediums_from_linkmodes(9)

okay that's the page, bestie 🫶 source/version vibes are ./drivers/net/phy, dated October 2026, and yes — the manual name is phy_caps_lo...linkmode_rev(9). slay, go read some kernel code 💖✨