allocate_resource(9)

🎀 allocate_resource(9) — Kernel API Manual 🎀

okay bestie, welcome to the Kernel API Manual entry for allocate_resource(9) — it’s giving resource-tree realness and we’re gonna get you through it. 💖

🌸 NAME 🌸

allocate_resource — allocate an empty slot in the resource tree given range & alignment. The resource will be reallocated with a new size if it was already allocated. ✨

✨ SYNOPSIS ✨

int allocate_resource (struct resource *root , struct resource *new , resource_size_t size , resource_size_t min , resource_size_t max , resource_size_t align , resource_alignf alignf , void *alignf_data );

💖 ARGUMENTS 💖

okay so here’s the whole cast, and yes every single one matters 🫶

• root — root resource descriptor. the root of the whole situation, periodt. 🌳
• new — resource descriptor desired by the caller. your dream little slot, basically. ✨
• size — requested resource region size. how much room you’re asking for. 📏
• min — minimum boundary to allocate. lowest edge allowed. ⬇️
• max — maximum boundary to allocate. highest edge allowed. ⬆️
• align — alignment requested, in bytes. yes, in bytes, bestie. 🧚
• alignf — alignment function, optional, called if not NULL. if it’s not NULL, it gets called. 👀
• alignf_data — arbitrary data to pass to the alignf function. the little gift bag for alignf. 🎁

🦋 SEE ALSO 🦋

Kernel file: ./kernel/resource.c

go read these too, iykyk 👑 — the whole resource crew is right here:

• request_resource_conflict(9)
• request_resource(9)
• release_resource(9)
• find_next_res(9)
• walk_iomem_res_desc(9)
• region_intersects(9)
• find_resource_space(9)
• reallocate_resource(9)
• lookup_resource(9)
• insert_resource_conflict(9)
• insert_resource(9)
• insert_resource_expand_to_fit(9)
• remove_resource(9)
• adjust_resource(9)
• resource_alignment(9)
• __request_region(9)
• __release_region(9)
• release_mem_region_adjustable(9)
• merge_system_ram_resource(9)
• devm_request_resource(9)
• devm_release_resource(9)
• devm_request_free_mem_region(9)
• alloc_free_mem_region(9)

xoxo, your kernel bestie 💖 — this page is from ./kernel, dated October 2026, for allocate_resource(9). slay and happy resource allocating 🫶✨