find_first_bit(9)

💅 find_first_bit

okay so bestie, welcome to the Kernel API Manual ✨ — yes you're literally reading kernel API docs now, main character energy fr fr 🎀

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🌸 NAME 🌸

find_first_bit — find the first set bit in a memory region 💖

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✨ SYNOPSIS ✨

unsigned long find_first_bit (const unsigned long *addr , unsigned long
size );

that's the whole signature, no cap 🫶

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🧚 ARGUMENTS 🧚

• addr — The address to start the search at 👀 like, where the hunt begins
• size — The maximum number of bits to search 🎀 the search budget, basically

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🌈 DESCRIPTION 🌈

Returns the bit number of the first set bit. ⭐

And if no bits are set? it just returns size. yep, that's it, that's the whole vibe check 💀 no drama, no -1, just size. iconic behavior honestly.

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🦋 SEE ALSO 🦋

Kernel file ./tools/include/linux/find.h 👑

• find_next_bit(9)
• find_next_and_bit(9)
• find_next_zero_bit(9)
• find_first_and_bit(9)
• find_first_zero_bit(9)

all the bit-finding besties, go read them too 💜

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ngl bestie, this one's short and sweet — but the details are the details, so memorize them 😭💖

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✨ k bye, this page was brought to you by ./tools/include/linux, dated October 2026, and it's literally named find_first_bit(9) — slay, go find those bits ✨ 🍓🧚‍♀️👑🌸🫶