mips_cdmm_cpu_online(9)

💻 mips_cdmm_cpu_online 💻

okay bestie, welcome to the Kernel API Manual — yes this is a real man page from the kernel, and yes it's about mips_cdmm_cpu_online. let's get into it ✨

🌸 NAME 🌸

mips_cdmm_cpu_online — the callback for CPUHP ONLINE: it's literally the thing that brings up the CDMM bus. no cap, that's the whole job 🫶

🎀 SYNOPSIS 🎀

int mips_cdmm_cpu_online (unsigned int cpu );

🦋 ARGUMENTS 🦋

• cpu — an unsigned int holding the CPU number. that's it. that's the argument. icon behavior honestly 💅

⭐ DESCRIPTION ⭐

so this is a work_on_cpu callback function 👑 and it's executed on a given CPU to do one of two things:

1. discover CDMM devices on that CPU, or
2. call the CDMM driver cpu_up callback for all the devices that were already discovered on that CPU.

it's used as a work_on_cpu callback function during initialisation — like its whole moment to shine ✨ and then, when CPUs are brought online, the function gets invoked directly on the hotplugged CPU. no middleman, main character energy fr fr 💜

🔥 SEE ALSO 🔥

okay this list is long but we're not skipping a single one, periodt. go read these:

• Kernel file ./drivers/bus/mips_cdmm.c
• struct mips_cdmm_work_dev(9)
• mips_cdmm_void_work(9)
• mips_cdmm_int_work(9)
• BUILD_PERCPU_HELPER(9)
• mips_cdmm_driver_register(9)
• mips_cdmm_driver_unregister(9)
• struct mips_cdmm_bus(9)
• mips_cdmm_get_bus(9)
• mips_cdmm_cur_base(9)
• mips_cdmm_phys_base(9)
• mips_cdmm_setup(9)
• mips_cdmm_early_probe(9)
• mips_cdmm_release(9)
• mips_cdmm_bus_discover(9)
• BUILD_PERDEV_HELPER(9)
• mips_cdmm_cpu_down_prep(9)
• mips_cdmm_init(9)

and that's the whole page, bestie!! 🎀 huge shoutout to the source at ./drivers/bus and this October 2026 version, mwah 💋 slay, go bring up those buses 🚌✨