__of_device_is_reserved(9)

🦋 __of_device_is_reserved(9) — straight out of the Kernel API Manual

okay bestie, listen, this one's a tiny little function from the kernel's device tree world and honestly it's giving "small but mighty" 💅 we're literally just checking one thing and dipping. no cap.

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✨ NAME ✨

__of_device_is_reserved — check if a device is reserved 🎀

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🌸 SYNOPSIS 🌸

bool __of_device_is_reserved (const struct device_node *device );

like, that's the whole vibe. returns a bool, takes one const struct device_node *. clean. iconic. no notes. ✨

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💖 ARGUMENTS 💖

• device — the node you're checking for availability, okay? and heads up bestie, this one expects the locks to already be held when you call it 🫶 so like… you handle the locks, this function handles the check. division of labor, we love to see it.

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👑 RETURN 👑

• true if the status property is set to "reserved" 💀
• false otherwise

that's it. that's the whole answer. binary queen behavior, honestly. 🔥

lowkey important: this is the version that assumes the locks are held. don't forget that part, bestie, fr fr.

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🧚 SEE ALSO 🧚

sooo there's a whole friend group here. first up, the kernel file it lives in:

• Kernel file ./drivers/of/base.c

and then the entire of-crew, in the order the manpage gives them 🎀:

• of_find_all_nodes(9)
• __of_device_is_compatible(9)
• of_machine_compatible_match(9)
• of_machine_read_compatible(9)
• of_machine_read_model(9)
• of_machine_get_match(9)
• of_machine_get_match_data(9)
• __of_device_is_available(9)
• of_device_is_available(9)
• __of_device_is_fail(9)
• of_device_is_big_endian(9)
• of_get_parent(9)
• of_get_next_parent(9)
• of_get_next_child(9)
• of_get_next_child_with_prefix(9)
• of_get_next_available_child(9)
• of_get_next_reserved_child(9)
• of_get_next_cpu_node(9)
• of_get_compatible_child(9)
• of_get_child_by_name(9)
• of_get_available_child_by_name(9)
• of_find_node_opts_by_path(9)
• of_find_node_by_name(9)
• of_find_node_by_type(9)
• of_find_compatible_node(9)
• of_find_node_with_property(9)
• of_match_node(9)
• of_find_matching_node_and_match(9)
• of_alias_from_compatible(9)
• of_find_node_by_phandle(9)
• of_parse_phandle_with_args_map(9)
• of_count_phandle_with_args(9)
• __of_add_property(9)
• of_add_property(9)
• of_remove_property(9)
• of_alias_scan(9)
• of_alias_get_id(9)
• of_alias_get_highest_id(9)
• of_console_check(9)
• of_find_next_cache_node(9)
• of_find_last_cache_level(9)
• of_map_id(9)
• of_map_iommu_id(9)
• of_map_msi_id(9)

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and that's the whole page, bestie — go check some reserved devices 💜

sign-off time 🎀 this one ships as part of the Kernel API Manual, lives in ./drivers/of, and the date on it is October 2026. periodt. 💅✨