BITMAP BITOPS(9)

🎀 bitmap bitops 🎀

okay bestie, welcome to bitmap bitops(9) from the Kernel API Manual — literally the backstage pass to bitmap bit-twiddling and I'm obsessed 💅✨

also, the following operations in asm/bitops.h apply to bitmaps.:

• set_bit(bit, addr) — does *addr |= bit, so it sets that bit 💖
• clear_bit(bit, addr) — clears it with *addr &= ~bit 🧼
• change_bit(bit, addr) — flips it via *addr ^= bit 🔁
• test_bit(bit, addr) — asks "is bit set in *addr?" 👀
• test_and_set_bit(bit, addr) — sets bit and returns old value 🫶
• test_and_clear_bit(bit, addr) — clears bit and returns old value 🧚
• test_and_change_bit(bit, addr) — changes bit and returns old value 🌸
• find_first_zero_bit(addr, nbits) — positions first zero bit in *addr 🕵️‍♀️
• find_first_bit(addr, nbits) — positions first set bit in *addr ⭐
• find_next_zero_bit(addr, nbits, bit) — positions next zero bit in *addr >= bit 🔍
• find_next_bit(addr, nbits, bit) — positions next set bit in *addr >= bit 🔥
• find_next_and_bit(addr1, addr2, nbits, bit) — same as find_next_bit, but in (*addr1 & *addr2) 👑

🌈 SEE ALSO 🌈

• Kernel file ./include/linux/bitmap.h
• bitmap overview(9)
• declare bitmap(9)
• bitmap_find_next_zero_area(9)
• bitmap_or_equal(9)
• bitmap_weight_from(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 cutie came from ./include/linux, dated October 2026, and it's bitmap bitops(9) signing off 🫶