ACPI_ROUND_DOWN

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#define ACPI_ROUND_DOWN_TO_32BIT(a) ACPI_ROUND_DOWN(a, 4)

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#define ACPI_ROUND_DOWN_TO_64BIT(a) ACPI_ROUND_DOWN(a, 8)

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#define ACPI_ROUND_DOWN_TO_NATIVE_WORD(a) ACPI_ROUND_DOWN(a, sizeof(acpi_size))

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ACPI_ROUND_DOWN(field_byte_offset,

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ACPI_ROUND_DOWN(nearest_byte_address, byte_alignment);

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(u32) ACPI_ROUND_DOWN(ACPI_DIV_8(info->field_bit_position),

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field_byte_offset = ACPI_DIV_8(ACPI_ROUND_DOWN(field_bit_offset, 8));