bitmap_from_arr32(9)

okay so welcome to the bitmap_from_arr32(9) page from the Kernel API Manual, bestie 💖 this is your group-chat cheat sheet for copying bits from a u32 array into a bitmap. no cap, it's giving low-level but make it cute ✨

🌸 NAME 🌸

bitmap_from_arr32 — copy the contents of u32 array of bits to bitmap. that's the whole main character mission: bits go from the u32 side to the bitmap side, and we're obsessed 💅

✨ SYNOPSIS ✨

here's the exact signature, don't @ me:

void bitmap_from_arr32 (unsigned long *bitmap , const u32 *buf ,
       unsigned int nbits );

🎀 ARGUMENTS 🎀

three little besties walk into the function:

• bitmap — array of unsigned longs, the destination bitmap. this is where the bits are going, the main character destination 👑
• buf — array of u32 (in host byte order), the source bitmap. host byte order is literally right there, bestie 🫶
• nbits — number of bits in bitmap. yes, that many bits, no more no less 💀

🦋 SEE ALSO 🦋

go read the Kernel file ./lib/bitmap.c bitmap introduction(9) and then these other icons, fr fr:

• __bitmap_shift_right(9)
• __bitmap_shift_left(9)
• bitmap_cut(9)
• bitmap_find_next_zero_area_off(9)
• bitmap_pos_to_ord(9)
• bitmap_remap(9)
• bitmap_bitremap(9)
• bitmap_onto(9)
• bitmap_fold(9)
• bitmap_to_arr32(9)
• bitmap_from_arr64(9)
• bitmap_to_arr64(9)

byeee bestie, this page's source/version is ./lib, it's dated October 2026, and the manual page is bitmap_from_arr32(9) — mwah 💋🦋