BUILD_PERDEV_HELPER(9)

🎀 NAME 🎀

Okay so welcome to BUILD_PERDEV_HELPER(9) in the Kernel API Manual, bestie 💖. This is the page for BUILD_PERDEV_HELPER — the helper to call a CDMM driver callback if the CPU matches. Tiny name, very specific job, we love to see it 💅.

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✨ SYNOPSIS ✨

BUILD_PERDEV_HELPER (_name );

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🌸 ARGUMENTS 🌸

• _name — the name of the CDMM driver callback function. Like, literally the callback function’s name, no cap 🫶.

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💖 DESCRIPTION 💖

Okay so here’s the tea: BUILD_PERDEV_HELPER generates a bus_for_each_dev callback function to call a specific CDMM driver callback function for the device if the device’s CPU matches that pointed to by the data argument. Periodt ✨.

This is used for informing drivers for all devices on a given CPU of some event (such as the CPU going online/offline). Honestly? Very “group chat announcement for one specific CPU” energy 🦋.

Also important, bestie: it is expected to already be called from the appropriate CPU. That’s the vibe check, so don’t skip it 💅.

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👑 SEE ALSO 👑

Kernel file: ./drivers/bus/mips_cdmm.c — yes, literally right there, go look 👀.

• 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)
• mips_cdmm_cpu_down_prep(9)
• mips_cdmm_cpu_online(9)
• mips_cdmm_init(9)

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Okay that’s the whole page, bestie 💖 — this one’s from ./drivers/bus, dated October 2026, and it’s the BUILD_PERDEV_HELPER(9) page in the Kernel API Manual. Slay and stay kernel-pilled ✨🫶