Linux 核心應用程式介面 :: The Linux Kernel API
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Bit Operations

Table of Contents
set_bit — Atomically set a bit in memory
__set_bit — Set a bit in memory
clear_bit — Clears a bit in memory
__change_bit — Toggle a bit in memory
change_bit — Toggle a bit in memory
test_and_set_bit — Set a bit and return its old value
__test_and_set_bit — Set a bit and return its old value
test_and_clear_bit — Clear a bit and return its old value
__test_and_clear_bit — Clear a bit and return its old value
test_and_change_bit — Change a bit and return its new value
test_bit — Determine whether a bit is set
find_first_zero_bit — find the first zero bit in a memory region
find_next_zero_bit — find the first zero bit in a memory region
ffz — find first zero in word.
ffs — find first bit set
hweight32 — returns the hamming weight of a N-bit word
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memchrUpset_bit
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