device_lock_reset_class(9)

💅 device_lock_reset_class(9) 💅

okay so bestie, welcome to the Kernel API Manual — this is the device_lock_reset_class(9) page, and it’s giving tiny-but-mighty kernel helper energy. ✨ No cap, it’s a short one, but every line matters.

🌸 NAME 🌸

device_lock_reset_class — return a device to the default lockdep novalidate state. That’s it, that’s the whole mood. 💅

✨ SYNOPSIS ✨

device_lock_reset_class (dev );

literally just dev, bestie. One argument, no drama.

🎀 ARGUMENTS 🎀

• dev — the device to modify. Yep, that’s the one getting the reset treatment, and yes you have to pass it. 🫶

🦋 DESCRIPTION 🦋

okay so the big rule: this must be called with device_lock already held, bestie. Not “I’ll lock it after,” not “the lock is implied,” not “it looked at me funny.” Already. Held. 😭

The page says for example from driver ->remove, so that’s the documented example — and the whole point is returning the device to the default lockdep novalidate state. No extra steps invented, no secret sauce, just the facts with a lil sparkle. ✨

⚠️ bestie, this is a must, not a suggestion: device_lock already held. The kernel does not do “close enough” energy. 💀

💜 SEE ALSO 💜

Kernel file ./include/linux/device.h — the source-file bestie — plus this whole friend group of related man pages, all iconic:

• 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_set_class(9)

mwah 💋 that’s the whole page. This cutie lives under ./include/linux, the date on it is October 2026, and it’s still serving device_lock_reset_class(9) from the Kernel API Manual — periodt. 🎀✨