DEVICE_ATTR_ADMIN_RO(9)

💅 DEVICE_ATTR_ADMIN_RO 💅

okay so bestie, welcome to the DEVICE_ATTR_ADMIN_RO page in the Kernel API Manual — yes that's the whole manual name, we're fancy here 💖 this one's short and sweet and honestly kind of iconic for it.

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✨ NAME ✨

DEVICE_ATTR_ADMIN_RO — define an admin-only readable device attribute. that's it. that's the whole job. no cap 🎀

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🌸 SYNOPSIS 🌸

DEVICE_ATTR_ADMIN_RO (_name );

like, yes, there's a space before the _name in the original and I'm not touching it because copying things exactly is the whole vibe check ✅

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🦋 ARGUMENTS 🦋

• _name — the attribute name. that's the one (1) thing you hand it. give it a name and it slays ✨

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💜 DESCRIPTION 💜

so here's the tea: it's like DEVICE_ATTR_RO, but _mode is 0400. 🔥

that's literally the entire description and honestly? the way it says so much with so little. 0400 — admin-only readable, main character energy, nobody else gets to peek 👑

fr fr the only difference from DEVICE_ATTR_RO is that _mode value, so don't go assuming extra behaviour, because the page doesn't say there is any 🙈

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🌈 SEE ALSO 🌈

the friend group 💅 all of these, exactly as listed, no gatekeeping:

• Kernel file ./include/linux/device.h struct subsys_interface(9), struct device_attribute(9), struct dev_ext_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_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 I said. whole friend group. every single one 🫶

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okay that's the page!! mwah 💋 tiny little sign-off for you: this one lives in ./include/linux, it's dated October 2026, and it's filed under DEVICE_ATTR_ADMIN_RO(9) — go be admin-only and readable about it, bestie 💖✨🎀