lpm_adjust(9)

💅 lpm_adjust — adjust path mask 💅

okay so real talk, this one's from the Kernel API Manual, section 9 (lpm_adjust(9)), and it's honestly such a tiny little icon. one function, two args, zero drama. let's get into it ✨

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🌸 SYNOPSIS 🌸

int lpm_adjust (int lpm , int mask );

that's it. that's the whole signature. she's short, she's sweet, she's giving minimalism 💅

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🎀 ARGUMENTS 🎀

• lpm — the path mask you're adjusting, bestie. this is the one getting shifted 👑
• mask — the mask of available paths. this is the one we're trying to match up with 🦋

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✨ DESCRIPTION ✨

okay so here's the vibe: you take lpm and you shift it right, over and over, until either

• lpm and mask have at least one bit in common 🫶, or
• lpm is zero 💀

that's the whole stopping condition. no cap. then it returns the resulting lpm — the shifted version, not the original one. so like, lowkey the return value is the main character here 🌟

it's giving "keep scooting over until you find a friend or you're literally empty." genuinely obsessed with how simple that is 😭

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/s390/cio/ccwreq.c
• ccw_request_start(9)
• ccw_request_cancel(9)
• ccw_request_handler(9)
• ccw_request_timeout(9)
• ccw_request_notoper(9)

like yeah, go read those next, they're the rest of the friend group 🧚💜

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💀 reminder: this shifts lpm right until it shares a bit with mask or hits zero, and returns the resulting lpm. that's the whole entire behaviour. nothing more, nothing less, don't @ me 🙈

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mwah 💋 this page lives in ./drivers/s390/cio, it's dated October 2026, and it's filed as lpm_adjust(9) — section 9, kernel API, exactly where she belongs. 🌈🎀