fdt_pack(9)

💖 fdt_pack(9) — the pack-a-device-tree-blob glow-up 💖

okay bestie, welcome to the fdt_pack(9) page from the Kernel API Manual 🎀 this one is short but it slaps, and it's genuinely a little life-changer if you've been out here leaving gaps everywhere.

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✨ NAME ✨

fdt_pack — pack a device tree blob 💅

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🦋 SYNOPSIS 🦋

int fdt_pack (void *fdt );

like, that's it. one function. one argument. iconic minimalism ✨

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🌸 ARGUMENTS 🌸

• fdt — pointer to the device tree blob 🫶 that's your blobby little guy right there.

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💜 DESCRIPTION 💜

okay so here's the tea: fdt_pack reorganizes the device tree blob to eliminate any free space and pack it into the minimum possible size. literally the glow-up. it takes all those awkward gaps and just… closes them. 💀

and why would you care? because after you make modifications, you might have left gaps in the blob — ngl, it happens to everyone — and this is the function that cleans up after you. it's giving "post-edit tidy-up main character energy" 👑

highkey useful right after modifications that might have left gaps in the blob. no cap. 🙈

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⭐ RETURN ⭐

• 0 — on success, we love to see it 🎉
• -FDT_ERR_BADMAGIC — standard meaning
• -FDT_ERR_BADVERSION — standard meaning
• -FDT_ERR_BADSTATE — standard meaning
• -FDT_ERR_BADSTRUCTURE — standard meaning
• -FDT_ERR_BADLAYOUT — standard meaning

basically, 0 is the slay outcome and the rest are the standard meanings, so if something looks off, that's the vibe check failing 😭

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👑 SEE ALSO 👑

the whole friend group fr fr — and yes, we're listing every single one, because every bestie counts 🫶:

Kernel file ./scripts/dtc/libfdt/libfdt.h

fdt_offset_ptr(9), fdt_next_tag(9), fdt_first_subnode(9), fdt_next_subnode(9), fdt_for_each_subnode(9), fdt_header_size(9), fdt_header_size_(9), fdt_check_header(9), fdt_move(9), fdt_check_full(9), fdt_get_string(9), fdt_string(9), fdt_find_max_phandle(9), fdt_get_max_phandle(9), fdt_generate_phandle(9), fdt_num_mem_rsv(9), fdt_get_mem_rsv(9), fdt_subnode_offset_namelen(9), fdt_subnode_offset(9), fdt_path_offset_namelen(9), fdt_path_offset(9), fdt_get_name(9), fdt_first_property_offset(9), fdt_next_property_offset(9), fdt_for_each_property_offset(9), fdt_get_property_by_offset(9), fdt_get_property_namelen(9), fdt_get_property(9), fdt_getprop_by_offset(9), fdt_getprop_namelen(9), fdt_getprop(9), fdt_get_phandle(9), fdt_get_alias_namelen(9), fdt_get_alias(9), fdt_get_symbol_namelen(9), fdt_get_symbol(9), fdt_get_path(9), fdt_supernode_atdepth_offset(9), fdt_node_depth(9), fdt_parent_offset(9), fdt_node_offset_by_prop_value(9), fdt_node_offset_by_phandle(9), fdt_node_check_compatible(9), fdt_node_offset_by_compatible(9), fdt_stringlist_contains(9), fdt_stringlist_count(9), fdt_stringlist_search(9), fdt_stringlist_get(9), FDT_MAX_NCELLS(9), fdt_address_cells(9), fdt_size_cells(9), fdt_setprop_inplace_namelen_partial(9), fdt_setprop_inplace(9), fdt_setprop_inplace_u32(9), fdt_setprop_inplace_u64(9), fdt_setprop_inplace_cell(9), fdt_nop_property(9), fdt_nop_node(9), fdt_create_with_flags(9), fdt_create(9), fdt_resize(9), fdt_add_reservemap_entry(9), fdt_finish_reservemap(9), fdt_begin_node(9), fdt_property(9), fdt_property_placeholder(9), fdt_end_node(9), fdt_finish(9), fdt_create_empty_tree(9), fdt_open_into(9), fdt_add_mem_rsv(9), fdt_del_mem_rsv(9), fdt_set_name(9), fdt_setprop_namelen(9), fdt_setprop(9), fdt_setprop_placeholder_namelen(9), fdt_setprop_placeholder(9), fdt_setprop_u32(9), fdt_setprop_u64(9), fdt_setprop_cell(9), fdt_setprop_string(9), fdt_setprop_namelen_string(9), fdt_setprop_empty(9), fdt_appendprop(9), fdt_appendprop_u32(9), fdt_appendprop_u64(9), fdt_appendprop_cell(9), fdt_appendprop_string(9), fdt_appendprop_addrrange(9), fdt_delprop(9), fdt_add_subnode_namelen(9), fdt_add_subnode(9), fdt_del_node(9), fdt_overlay_apply(9), fdt_overlay_target_offset(9), fdt_strerror(9)

iykyk, that's the whole squad 🔥 and fdt_pack is so happy to be included.

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🌸 that's the whole page bestie 🌸 you got this. go pack that blob. ✨💖

this iconic little number lives in ./scripts/dtc/libfdt and was dated October 2026 — like, mwah, periodt. 🎀🦋💜