STRUCT DEV_EXT_ATTRIBUTE(9)

💖 NAME

okay so bestie, say hi to struct dev_ext_attribute — the iconic little struct that's literally an exported device attribute with extra context, periodt ✨

(also quick vibe check: this is from the Kernel API Manual, section 9 — you're in the kernel dev page, iykyk 💅)

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✨ SYNOPSIS

like, here's the whole thing, no cap:

struct dev_ext_attribute {
    struct device_attribute attr;
    void *var;
 };

that's it. two members. she's lowkey minimal and we're obsessed 🎀

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🌸 MEMBERS

• attr — the exported device attribute itself, main character energy, doing the actual attribute work 🦋
• var — a pointer to context, aka the little carry-on bag of extra info that comes with her ✨

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💅 SEE ALSO

okay this list is a whole journey, buckle up 🫶 — and yeah, it lives in the kernel file ./include/linux/device.h:

• struct subsys_interface(9)
• struct device_attribute(9)
• DEVICE_ATTR(9)
• DEVICE_ATTR_RW(9)
• DEVICE_ATTR_ADMIN_RW(9)
• DEVICE_ATTR_RW_NAMED(9)
• DEVICE_ATTR_RO(9)
• DEVICE_ATTR_ADMIN_RO(9)
• DEVICE_ATTR_RO_NAMED(9)
• DEVICE_ATTR_WO(9)
• DEVICE_ATTR_WO_NAMED(9)
• DEVICE_ULONG_ATTR(9)
• DEVICE_INT_ATTR(9)
• DEVICE_BOOL_ATTR(9)
• DEVICE_STRING_ATTR_RO(9)
• enum device_link_state(9)
• enum dl_dev_state(9)
• enum device_removable(9)
• struct dev_links_info(9)
• struct dev_msi_info(9)
• enum device_physical_location_panel(9)
• enum device_physical_location_vertical_position(9)
• enum device_physical_location_horizontal_position(9)
• struct device_physical_location(9)
• enum struct_device_flags(9)
• struct device(9)
• struct device_link(9)
• device_set_driver_override(9)
• device_has_driver_override(9)
• device_match_driver_override(9)
• device_iommu_mapped(9)
• dev_name(9)
• dev_bus_name(9)
• device_find_child_by_name(9)
• device_find_any_child(9)
• device_lock_set_class(9)
• device_lock_reset_class(9)

like, that's a friend group 💀 but honestly every single one of them ate 🔥

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ngl bestie, go read them all. not me being a whole study guide rn 📚💖

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and that's the tea 🍓 — brought to you by the source at ./include/linux, dated October 2026, serving struct dev_ext_attribute(9) realness. slay, bye 👑✨