memset_io(9)

💅 memset_io(9) — like, the Kernel API Manual bestie ✨

Okay so picture this: it's giving kernel API manual, the function is memset_io, and she's here to set a whole range of I/O memory to one constant value. That's it, that's the vibe. 🎀

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🌸 NAME 🌸

memset_io — set a range of I/O memory to a constant value. no cap, that's literally the whole job description 💖

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✨ SYNOPSIS ✨

void memset_io (volatile void __iomem *addr , int val , size_t count );

Three args, one void return, zero drama. she's neat like that 🫶

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🦋 ARGUMENTS 🦋

• addr — the beginning of the I/O-memory range you're setting, typed as volatile void __iomem *. it's giving "start of the glow-up zone" ✨
• val — the value you're setting that memory to. one value, many bytes, main character energy 👑
• count — the number of bytes to set. yes bestie, bytes. count them, love them 💅

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🌈 DESCRIPTION 🌈

Set a range of I/O memory to a given value. That's it. That's the function. she does exactly one thing and she does it iconically 🔥

fr fr, do not overthink this one — it sets I/O memory, count bytes of it, starting at addr, all to val. periodt 💀

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💜 SEE ALSO 💜

• Kernel file ./lib/iomem_copy.c
• memcpy_fromio(9)
• memcpy_toio(9)

the whole I/O-memory friend group, iykyk 🧚

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and that's the whole page!! brought to you by the <pink>./lib</pink> girlies, dated <purple>October 2026</purple>, and filed right back under <hotpink>memset_io(9)</hotpink> where she belongs 💖 mwah, stan her, seeya 🦋