DEVICE_ATTR_WO(9)

💅 DEVICE_ATTR_WO(9) — bestie's guide to the kernel API manual ✨

okay so this one's from the Kernel API Manual (that's the manual name, keeping it cute and official up top 🎀). Strap in, because this macro is short but it serves.

---

🌸 NAME 🌸

DEVICE_ATTR_WO — it defines an admin-only writable device attribute. That's it. That's the whole vibe. Write-only, admin-only, no reading, we don't do that here 💅

---

✨ SYNOPSIS ✨

DEVICE_ATTR_WO (_name );

---

🦋 ARGUMENTS 🦋

• _name — the attribute name, literally the name of your attribute, that's the whole job 🫶

---

💖 DESCRIPTION 💖

So it's like DEVICE_ATTR, bestie — same energy, same family — except the mode is hardcoded to 0200 and the store function is <_name>_store.

That's the whole tea ☕. 0200 means write-only for the owner, and <name>_store is the callback it generates for you. No cap, that's all this macro does, and honestly? Iconic. Let it be simple 🔥

---

👑 SEE ALSO 👑

Everything below is straight from the kernel file ./include/linux/device.h, so go read these if you wanna go deeper, iykyk 📚

• 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_ADMIN_RO(9)
• DEVICE_ATTR_RO_NAMED(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)

---

no notes, the whole list is here, go click around, that's the assignment 🧚

---

and that's a wrap!! 🌈 this page lives at ./include/linux, dated October 2026 — mwah, slay, periodt, hope this helped bestie 💜🍓