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由 Fan Li 提交于
1. Skip __reverse_ulong if the bitmap is empty. 2. Reduce branches and codes. According to my test, the performance of this new version is 5% higher on an empty bitmap of 64bytes, and remains about the same in the worst scenario. Signed-off-by: NFan li <fanofcode.li@samsung.com> Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>
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