From: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> commit 1dade3a7048ccfc675650cd2cf13d578b095e5fb upstream. Sometimes it is useful to find the access_width field value in bytes and not in bits so add a helper that can be used for this purpose. Suggested-by: Jean Delvare <jdelvare@xxxxxxx> Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> Reviewed-by: Jean Delvare <jdelvare@xxxxxxx> Cc: 4.16+ <stable@xxxxxxxxxxxxxxx> # 4.16+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- include/acpi/actypes.h | 2 ++ 1 file changed, 2 insertions(+) --- a/include/acpi/actypes.h +++ b/include/acpi/actypes.h @@ -551,6 +551,8 @@ typedef u64 acpi_integer; #define ACPI_VALIDATE_RSDP_SIG(a) (!strncmp (ACPI_CAST_PTR (char, (a)), ACPI_SIG_RSDP, 8)) #define ACPI_MAKE_RSDP_SIG(dest) (memcpy (ACPI_CAST_PTR (char, (dest)), ACPI_SIG_RSDP, 8)) +#define ACPI_ACCESS_BYTE_WIDTH(size) (1 << ((size) - 1)) + /******************************************************************************* * * Miscellaneous constants
