Ben Greear wrote: > Similarly named methods elsewhere seem to indicate it is supposed to be > ones-based counting (ie, bit (1<<0) would be considred 'bit 1'.
ffs() is defined to use one-based counting: <http://pubs.opengroup.org/onlinepubs/9699919799/functions/ffs.html> __ffs() uses zero-based counting. On gcc, it's likely to be implemented with__builtin_ctz*(), whose documentation says: | Returns the number of trailing 0-bits in x, starting at the least | significant bit position. Regards, Clemens -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
