early_init_fdt_reserve_self(9)

💖 early_init_fdt_reserve_self(9) 💖

okay so bestie, welcome to the Kernel API Manual — yes that's the manual name, don't @ me — and today's main character is early_init_fdt_reserve_self. It lives in the kernel API girlie ecosystem and it does exactly one thing, but it does it flawlessly. Let's get into it 🎀

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✨ NAME ✨

early_init_fdt_reserve_self — reserve the memory used by the FDT blob 🦋

like... that's it. that's the whole vibe. it reserves the memory that the FDT blob is chilling in. no cap.

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🌸 SYNOPSIS 🌸

void early_init_fdt_reserve_self (void );

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💅 ARGUMENTS 💅

• void — no arguments. zero. none. she takes nothing and she needs nothing, it's giving independent queen energy 👑

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🔥 SEE ALSO 🔥

okay so there's a whole friend group here — the kernel file ./drivers/of/fdt.c is where everybody hangs out, and these are literally all the besties you might want to check out next:

• unflatten_dt_nodes(9)
• __unflatten_device_tree(9)
• of_fdt_unflatten_tree(9)
• early_init_fdt_scan_reserved_mem(9)
• of_scan_flat_dt(9)
• of_scan_flat_dt_subnodes(9)
• of_get_flat_dt_subnode_by_name(9)
• of_fdt_is_compatible(9)
• of_flat_dt_is_compatible(9)
• of_flat_dt_match_machine(9)
• early_init_dt_check_for_initrd(9)
• early_init_dt_check_for_elfcorehdr(9)
• early_init_dt_check_for_usable_mem_range(9)
• early_init_dt_check_kho(9)
• unflatten_device_tree(9)
• unflatten_and_copy_device_tree(9)

iykyk 👀✨ honestly every single one of them ate, go read them all, fr fr.

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💀 real talk though: this function takes void, returns void, and its one job is reserving the FDT blob's memory — don't go inventing extra behaviour for her, she's booked and busy being exactly what she is.

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and that's the tea 🍓 this page is coming at you from the source ./drivers/of, dated October 2026, and it's literally titled early_init_fdt_reserve_self(9) — periodt. love u, go reserve some memory responsibly 🫶💜🧚