__reserved_mem_init_node(9)

✨ __reserved_mem_init_node(9) ✨

okay bestie, welcome to the Kernel API Manual 💖 this one's a lil kernel function called __reserved_mem_init_node and honestly? it's giving backend baddie energy. it's the one that initializes a reserved memory region ✨ let's get into it 🎀

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🌸 SYNOPSIS 🌸

int __reserved_mem_init_node (struct reserved_mem *rmem , unsigned long
node );

like yes, that's the whole signature, she's lowkey compact 💅

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🦋 ARGUMENTS 🦋

• rmem — the reserved_mem structure you're initializing, bestie. she's the main character here 👑
• node — the FDT node that describes the reserved memory region 🌈 (FDT = flattened device tree, iykyk)

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💜 DESCRIPTION 💜

okay so here's the tea ☕ — this function iterates through the reserved memory drivers and calls the node_init callback for the compatible entry that matches the node 🫶

and on success? the operations pointer</> gets stored in the reserved_mem structure. slay. that's literally the whole vibe ✨

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🔥 RETURN 🔥

• 0 — on success 💖 periodt
• -ENODEV — if no compatible match is found 😭 like it looked, it really did, but nothing matched

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⭐ SEE ALSO ⭐

the source lives in the kernel file ./drivers/of/of_reserved_mem.c — go read it, it's iconic 👑

and these besties are all in the same friend group, fr fr:

• fdt_scan_reserved_mem_late(9)
• fdt_fixup_reserved_mem_node(9)
• fdt_validate_reserved_mem_node(9)
• fdt_init_reserved_mem_node(9)
• of_reserved_mem_device_init_by_idx(9)
• of_reserved_mem_device_init_by_name(9)
• of_reserved_mem_device_release(9)
• devm_of_reserved_mem_device_init(9)
• of_reserved_mem_lookup(9)
• of_reserved_mem_region_to_resource(9)
• of_reserved_mem_region_to_resource_byname(9)
• of_reserved_mem_region_count(9)

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and that's the whole page, bestie 🧚💜 this came out of ./drivers/of, dated October 2026, filed under __reserved_mem_init_node(9) — okay love u, go init some reserved memory, mwah 🎀✨