div_s64_rem(9)

💖 div_s64_rem(9) 💖

okay so bestie, welcome to the Kernel API Manual page for div_s64_rem — yes that's the whole name, yes it's a mouthful, and yes we're gonna get through it together 🫶

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✨ NAME ✨

div_s64_rem — signed 64bit divide with 32bit divisor with remainder

like, it does one (1) thing and it does it flawlessly 💅

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✨ SYNOPSIS ✨

s64 div_s64_rem (s64 dividend , s32 divisor , s32 *remainder );

the way this signature just sits there being all typed and correct 😭 so iconic of it

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✨ ARGUMENTS ✨

• dividend — a signed 64bit dividend. like, the big number. the main character of the division, no cap 👑
• divisor — a signed 32bit divisor. smaller vibes, but honestly still kind of important, it's the one doing the dividing 🎀
• remainder — pointer to a signed 32bit remainder. that's where the leftover bits get to live, rent free 🏠✨

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✨ RETURN ✨

it sets `*remainder` first, then returns dividend / divisor 💫

so like — both things happen, and one of them happens through a pointer, which is very much its whole personality. two birds, one function call 🦋

fr fr, read the order it does things in: *remainder gets set, then the quotient comes back. don't skip the pointer, bestie, it's not decorative 🙈

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✨ SEE ALSO ✨

okay this list is LONG and honestly a slay. all of these live in the kernel file ./include/linux/math64.h:

• div_u64_rem(9)
• div64_u64_rem(9)
• div64_s64_rem(9)
• div64_u64(9)
• div64_s64(9)
• div_u64(9)
• div_s64(9)
• mul_u64_add_u64_div_u64(9)
• mul_u64_u64_div_u64(9)
• mul_u64_u64_div_u64_roundup(9)
• DIV64_U64_ROUND_UP(9)
• DIV_U64_ROUND_UP(9)
• DIV64_U64_ROUND_CLOSEST(9)
• DIV_U64_ROUND_CLOSEST(9)
• DIV_S64_ROUND_CLOSEST(9)
• roundup_u64(9)

go off, math64.h family tree 🌸🧚 you have so many cousins and we love every single one of them 💜

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that's the whole page, div_s64_rem girlies. you're now officially educated 🎓✨

kisses, and remember: it's from ./include/linux, dated October 2026 — so mark your calendars and stan responsibly 💅💖