for_each_prime_number(9)

💖 for_each_prime_number(9) 💖

okay so bestie, welcome to the Kernel API Manual — this one's a macro that walks the primes for you and honestly? it ate. 💅

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✨ NAME ✨

for_each_prime_number — literally iterate over each prime upto a value 🧚

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🌸 SYNOPSIS 🌸

for_each_prime_number (prime , max );

(yes the spacing is quirky, that's just how the header file writes it, don't come for it 🙈)

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🎀 ARGUMENTS 🎀

• prime — the current prime number in this iteration ✨ lowkey the star of the show
• max — the upper limit, aka where we stop looking for primes 🔥

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🦋 DESCRIPTION 🦋

Starting from the first prime number 2, iterate over each prime number up to the max value. On each iteration, prime is set to the current prime number. 💖

max should be less than ULONG_MAX to ensure termination.

⚠️ no like seriously bestie — keep max below ULONG_MAX, that's your whole termination guarantee. don't be the main character who hangs the loop forever 😭💀

To begin with prime set to 1 on the first iteration use for_each_prime_number_from instead. 🫶

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🌈 SEE ALSO 🌈

• Kernel file ./include/linux/prime_numbers.h 💜
• for_each_prime_number_from(9) ⭐

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fr fr that's the whole page, no cap, every flag and caveat intact 👑 hope your iteration slays 💅✨

mwah 💋 — from the kernel source living at ./include/linux, dated October 2026, and yes the manual is literally called for_each_prime_number(9) — iconic, periodt 🎀🦋