linear_rang...selector_low(9)

📦 version 7.3.1, in nixpkgs unstable

💅 linear_range_get_selector_low(9)

okay so bestie, welcome to the Kernel API Manual ✨ we're doing kernel math today and honestly? it's giving glow-up. this one lives in the linear ranges universe and it's lowkey iconic 🎀

✨ NAME ✨

linear_range_get_selector_low — return linear range selector for value 🦋

like, you hand it a value, it hands you back a selector. match made in heaven fr fr 💖

🌸 SYNOPSIS 🌸

int linear_range_get_selector_low (const struct linear_range *r ,
unsigned int val , unsigned int *selector , bool *found );

no cap, that's the whole vibe 👑

🎀 ARGUMENTS 🎀

  • r — pointer to linear range where selector is looked from. this is the range we're snooping through 🔍
  • val — value for which the selector is searched. the main character of this whole operation ⭐
  • selector — address where found selector value is updated. we write the answer here, so she better be ready 💅
  • found — flag to indicate that given value was in the range. basically a little bool that goes "yup, we ate" 💀

🦋 DESCRIPTION 🦋

Return selector for which range value is closest match for given input value. 🫶

Value is matching if it is equal or smaller than given value. so like, the range value has to be <= your input — not bigger, bestie, that's the whole rule 🌈

If given value is in the range, then found is set true. 🎉 so you always know whether the match was real or we were just reaching 😭

🔥 RETURN 🔥

  • 0 on success 👑
  • -EINVAL if range is invalid or does not contain value smaller or equal to given value 🙈
⚠️ heads up: -EINVAL isn't just "oops bad range" — it also fires when there's literally no value in the range that's smaller than or equal to what you asked for. check that found flag, iykyk 💖

⭐ SEE ALSO ⭐

Kernel file ./lib/linear_ranges.c plus the whole friend group 💜:

and that's the page!! 🌸 brought to you straight outta ./lib 🧚, dated October 2026 — screenshot it, annotate it, put it on your fridge, periodt 💅💖✨

📦 where this page comes from