spi_res_alloc(9)

💖 spi_res_alloc(9) 💖

okay so this page is from the Kernel API Manual, and we're talking about spi_res_alloc(9) — yes bestie, that exact one. It's giving kernel-resource life-cycle realness, and we're gonna keep every detail intact 🫶✨

🎀 NAME 🎀

spi_res_alloc — allocate a spi resource that is life-cycle managed during the processing of a spi_message while using spi_transfer_one 💅

✨ SYNOPSIS ✨

void * spi_res_alloc (struct spi_device *spi , spi_res_release_t release
       , size_t size , gfp_t gfp );

🌸 ARGUMENTS 🌸

• spi — the SPI device for which we allocate memory. main character device energy 🫶
• release — the release code to execute for this resource. yes, that release code 💖
• size — size to alloc and return. exactly that size, no cap.
• gfp — GFP allocation flags. the flags, periodt ✨

💫 RETURN 💫

It returns the pointer to the allocated data 🌟 — literally that pointer, bestie.

🔥 DESCRIPTION 🔥

okay so future tea: this may get enhanced in the future to allocate from a memory pool of the spi_device or spi_controller to avoid repeated allocations. that's the whole note, and it's lowkey important 👀

🦋 SEE ALSO 🦋

Kernel file ./drivers/spi/spi.c — __spi_register_driver(9), spi_alloc_device(9), spi_add_device(9), spi_new_device(9), spi_unregister_device(9), spi_register_board_info(9), spi_res_free(9), spi_res_add(9), spi_res_release(9), spi_finalize_current_transfer(9), __spi_pump_messages(9), spi_pump_messages(9), spi_take_timestamp_pre(9), spi_take_timestamp_post(9), spi_set_thread_rt(9), spi_get_next_queued_message(9), spi_finalize_current_message(9), spi_queued_transfer(9), spi_flush_queue(9), of_register_spi_devices(9), spi_new_ancillary_device(9), devm_spi_new_ancillary_device(9), acpi_spi_count_resources(9), acpi_spi_device_alloc(9), spi_target_abort(9), __spi_alloc_controller(9), __devm_spi_alloc_controller(9), spi_get_gpio_descs(9), spi_register_controller(9), devm_spi_register_controller(9), spi_unregister_controller(9), spi_replace_transfers(9), spi_split_transfers_maxsize(9), spi_split_transfers_maxwords(9), spi_set_cs_timing(9), spi_setup(9), spi_optimize_message(9), spi_unoptimize_message(9), devm_spi_optimize_message(9), spi_async(9), spi_sync(9), spi_sync_locked(9), spi_bus_lock(9), spi_bus_unlock(9), spi_write_then_read(9)

footer sign-off era: source/version ./drivers/spi, date October 2026, page spi_res_alloc(9) — mwah, that's the whole page, bestie 🫶💖✨