i8042_filter_t(9)

💅 i8042_filter_t(9) — the Kernel API Manual, bestie edition ✨

okay so like, welcome to the glow-up of the i8042_filter_t page from the Kernel API Manual. it's giving "niche but iconic" and honestly? i'm obsessed. let's get into it 🎀

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✨ NAME ✨

i8042_filter_t — the i8042 filter callback, aka the little gatekeeper function 💅

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🦋 SYNOPSIS 🦋

bool i8042_filter_t (unsigned char data , unsigned char str , struct
serio *serio , void *context );

like, look at her. four params, returns a bool. main character energy fr fr 👑

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🌸 ARGUMENTS 🌸

• data — the data the i8042 controller received 🍓
• str — the status register of the i8042 controller, yes ma'am
• serio — the serio of the i8042 controller, it's right there in the name bestie
• context — the context pointer that's associated with this callback 🫶

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💖 DESCRIPTION 💖

so this whole thing represents an i8042 filter callback. and what does a filter callback do, you ask? it can be used with i8042_install_filter and i8042_remove_filter to filter the i8042 input for platform-specific key codes ✨

basically: you install her, she peeks at the input, and she gets to decide what stays and what goes. the way that's literally her whole job 💅

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⚡ CONTEXT ⚡

interrupt context. periodt. that's the whole vibe check — she runs in interrupt context, so act accordingly 😭

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🔥 RETURN 🔥

• returns true if the data should be filtered out 🚫
• returns false if otherwise ✅

no in-between, no "it depends", just a clean little yes/no. we love a decisive icon 💜

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🌈 SEE ALSO 🌈

• the kernel file ./include/linux/i8042.h — go read it, iykyk 📖

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💀 real talk though: she runs in interrupt context, so don't be out here doing anything wild in there. keep it quick, keep it cute.

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and that's the page!! made with love from ./include/linux, dated October 2026 — mwah, bye bestie 🧚‍♀️💖⭐