postcore_param_cb(9)

✨ postcore_param_cb(9) ✨

okay so bestie, we're in the Kernel API Manual today and the star of the show is postcore_param_cb 🎀 — literally the general callback for a module/cmdline parameter that gets evaluated before the postcore initcall level. iykyk 💅

🌸 SYNOPSIS 🌸

postcore_param_cb (name , ops , arg , perm );

💖 ARGUMENTS 💖

• name — a valid C identifier that's the parameter name. yes bestie, it has to be a valid C identifier, no funny business 🙈
• ops — the set & get operations for this parameter 👑
• arg — the args for ops 🫶
• perm — visibility in sysfs ⭐

🦋 DESCRIPTION 🦋

so the ops can have NULL set or get functions. that's it, that's the whole vibe check ✨ — no cap, it's giving "simple but iconic."

🔥 SEE ALSO 🔥

go look at the kernel file ./include/linux/moduleparam.h and then go absolutely feral over these siblings, fr fr:

• module_param(9)
• module_param_unsafe(9)
• module_param_named(9)
• module_param_named_unsafe(9)
• module_param_cb(9)
• core_param_cb(9)
• arch_param_cb(9)
• subsys_param_cb(9)
• fs_param_cb(9)
• device_param_cb(9)
• late_param_cb(9)
• core_param(9)
• core_param_unsafe(9)
• __core_param_cb(9)
• module_param_string(9)
• parameq(9)
• parameqn(9)
• module_param_array(9)
• module_param_array_named(9)
• module_param_hw_named(9)
• module_param_hw_array(9)

mwah 💜 that's the whole page — brought to you from ./include/linux, dated October 2026, and it's postcore_param_cb(9) saying byeee 🧚