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由 Robert P. J. Day 提交于
Add the inline function "is_power_of_2()" to log2.h, where the value zero is *not* considered to be a power of two. Signed-off-by: NRobert P. J. Day <rpjday@mindspring.com> Acked-by: NKumar Gala <galak@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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