From: Mika Westerberg <mika.westerberg@linux.intel.com>
Date: Wed, 12 Feb 2020 14:59:39 +0000 (+0300)
Subject: ACPICA: Introduce ACPI_ACCESS_BYTE_WIDTH() macro
X-Git-Tag: v4.9.216~58
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ba7e258550e2fd5387181f30538b137381904eb3;p=thirdparty%2Fkernel%2Fstable.git

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 <jdelvare@suse.de>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Cc: 4.16+ <stable@vger.kernel.org> # 4.16+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h
index 1d798abae710b..f502d257d4944 100644
--- 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