device_lock_set_class(9)

💖 device_lock_set_class(9) 💖

okay so bestie, we're in the Kernel API Manual today and this one is short but mighty — it's the page for device_lock_set_class, and yes it's giving "tiny function, big lockdep energy." 🫶

---

✨ NAME ✨

device_lock_set_class — specify a temporary lock class while a device is attached to a driver 💅

---

🌸 SYNOPSIS 🌸

device_lock_set_class (dev , key );

---

🎀 ARGUMENTS 🎀

• dev — the device you're modifying, bestie. the main character of this call 🦋
• key — the lock class key data. that's the vibe-check payload 🔑

---

💜 DESCRIPTION 💜

okay so listen. this must be called with the device_lock already held — like, no cap, that lock is already in your hand when you call this. the classic spot is from driver ->probe. ⭐

and pls be careful: only override the default lockdep_no_validate class. that's the rule, that's the assignment, don't be out here overriding random classes fr fr. 🙈

---

🌈 SEE ALSO 🌈

the whole extended friend group 💖 — kernel file ./include/linux/device.h plus these icons:

• 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(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_reset_class(9)

---

🧚 friendly reminder: device_lock held first, and only the default lockdep_no_validate class gets overridden. that's the whole assignment, slay it correctly. 💀✨

---

and that's a wrap! this lil page lives in ./include/linux and it's dated October 2026 — so yeah, timestamps from the future, we love a forward-thinking icon 👑💅 no cap, periodt.