From b602d11385fa933cb35b63704355a3126681be0f Mon Sep 17 00:00:00 2001 From: Mika Westerberg Date: Fri, 17 Apr 2020 15:10:58 +0800 Subject: [PATCH] ACPICA: Introduce ACPI_ACCESS_BYTE_WIDTH() macro 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 Signed-off-by: Mika Westerberg Reviewed-by: Jean Delvare Cc: 4.16+ # 4.16+ Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman Signed-off-by: Yang Yingliang --- include/acpi/actypes.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h index 66ceb12ebc63..2939a6cd7fec 100644 --- a/include/acpi/actypes.h +++ b/include/acpi/actypes.h @@ -528,11 +528,12 @@ typedef u64 acpi_integer; #define ACPI_MAKE_RSDP_SIG(dest) (memcpy (ACPI_CAST_PTR (char, (dest)), ACPI_SIG_RSDP, 8)) /* - * Algorithm to obtain access bit width. + * Algorithm to obtain access bit or byte width. * Can be used with access_width of struct acpi_generic_address and access_size of * struct acpi_resource_generic_register. */ #define ACPI_ACCESS_BIT_WIDTH(size) (1 << ((size) + 2)) +#define ACPI_ACCESS_BYTE_WIDTH(size) (1 << ((size) - 1)) /******************************************************************************* * -- GitLab