DIV_ROUND_UP_POW2(9)

okay bestie, welcome to the DIV_ROUND_UP_POW2(9) page in the Kernel API Manual — it’s giving “divide and round up” and honestly it ate 💅✨

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✨ NAME ✨

DIV_ROUND_UP_POW2 — divide and round up 🎀

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💅 SYNOPSIS 💅

DIV_ROUND_UP_POW2 (n , d );

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🦋 ARGUMENTS 🦋

• n — numerator 🌸
• d — denominator (must be a power of 2). periodt, no cap 💀

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🌈 DESCRIPTION 🌈

So like, DIV_ROUND_UP_POW2 divides n by d and rounds up to the next multiple of d — and yes, d must be a power of 2, that part is literally not optional bestie 🙈💖

It avoids the integer overflows that may occur with __KERNEL_DIV_ROUND_UP 😭. Performance is roughly equivalent to __KERNEL_DIV_ROUND_UP, so it’s not sacrificing speed for the glow-up 🔥

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🫶 SEE ALSO 🫶

Kernel file ./include/linux/math.h, plus these icons: round_up(9), round_down(9), roundup(9), rounddown(9), abs(9), abs_diff(9), reciprocal_scale(9) ✨

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source/version: ./include/linux · date: October 2026 — DIV_ROUND_UP_POW2(9) out 💖🎀🧚