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kernel bitreverse function


is there already a global function to reverse the bits in a byte?

If not, wouldn't it be useful to put an optimized function (e.g. with
a 256-byte lookup-table, or 16-byte for the two nibbles to save space)
into the kernel, or into libkern?

Some drivers already implement their own reverse functions. And I ask,
because I need one too, for a new I2C driver.

Frank Wille

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