bitmap_weight_from(9)

💖 NAME 💖

okay bestie, this is bitmap_weight_from(9) from the Kernel API Manual — literally the Hamming weight for a memory region. iconic behavior honestly ✨

🌸 SYNOPSIS 🌸

unsigned long bitmap_weight_from (const unsigned long *bitmap , unsigned
       int start , unsigned int end );

🎀 ARGUMENTS 🎀

• bitmap — the base address 🫶
• start — the bitnumber to starts weighting
• end — the bitmap size in bits

🦋 DESCRIPTION 🦋

Returns the number of set bits in the region. If start >= end, return >= end. no cap, that's the whole vibe check 💅

👑 SEE ALSO 👑

Kernel file ./include/linux/bitmap.h plus the whole friend group:

• bitmap overview(9)
• bitmap bitops(9)
• declare bitmap(9)
• bitmap_find_next_zero_area(9)
• bitmap_or_equal(9)
• bitmap_scatter(9)
• bitmap_gather(9)
• bitmap_release_region(9)
• bitmap_allocate_region(9)
• bitmap_find_free_region(9)
• BITMAP_FROM_U64(9)
• bitmap_from_u64(9)
• bitmap_read(9)
• bitmap_write(9)

mwah 💋 this lil page lives in ./include/linux and the calendar on it says October 2026 — catch you in bitmap_weight_from(9) land! 🎀✨