From: Bob Moore <robert.moore@xxxxxxxxx> Improves readability and maintainability of the code. Fixes a problem with the UART serial bus descriptor for the number of data bits flags (was incorrectly 2 bits, should be 3). Signed-off-by: Bob Moore <robert.moore@xxxxxxxxx> Signed-off-by: Lv Zheng <lv.zheng@xxxxxxxxx> --- drivers/acpi/acpica/acmacros.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/acpi/acpica/acmacros.h b/drivers/acpi/acpica/acmacros.h index 5efad99..1fa91f1 100644 --- a/drivers/acpi/acpica/acmacros.h +++ b/drivers/acpi/acpica/acmacros.h @@ -293,6 +293,20 @@ #define ACPI_16BIT_MASK 0x0000FFFF #define ACPI_24BIT_MASK 0x00FFFFFF +/* Macros to extract flag bits from position zero */ + +#define ACPI_GET_1BIT_FLAG(value) ((value) & ACPI_1BIT_MASK) +#define ACPI_GET_2BIT_FLAG(value) ((value) & ACPI_2BIT_MASK) +#define ACPI_GET_3BIT_FLAG(value) ((value) & ACPI_3BIT_MASK) +#define ACPI_GET_4BIT_FLAG(value) ((value) & ACPI_4BIT_MASK) + +/* Macros to extract flag bits from position one and above */ + +#define ACPI_EXTRACT_1BIT_FLAG(field, position) (ACPI_GET_1BIT_FLAG ((field) >> position)) +#define ACPI_EXTRACT_2BIT_FLAG(field, position) (ACPI_GET_2BIT_FLAG ((field) >> position)) +#define ACPI_EXTRACT_3BIT_FLAG(field, position) (ACPI_GET_3BIT_FLAG ((field) >> position)) +#define ACPI_EXTRACT_4BIT_FLAG(field, position) (ACPI_GET_4BIT_FLAG ((field) >> position)) + /* * An object of type struct acpi_namespace_node can appear in some contexts * where a pointer to an object of type union acpi_operand_object can also -- 1.7.10 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
