修改led为gpio

hc

2024-10-12 a5969cabbb4660eab42b6ef0412cbbd1200cf14d

 kernel/Documentation/atomic_bitops.txt
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-
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-On atomic bitops.
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-
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+=============
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+Atomic bitops
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+=============
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 While our bitmap_{}() functions are non-atomic, we have a number of operations
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 operating on single bits in a bitmap that are atomic.
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  - RMW operations that have a return value are fully ordered.
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  - RMW operations that are conditional are unordered on FAILURE,
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-   otherwise the above rules apply. In the case of test_and_{}_bit() operations,
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+   otherwise the above rules apply. In the case of test_and_set_bit_lock(),
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    if the bit in memory is unchanged by the operation then it is deemed to have
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    failed.
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