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-rw-r--r--source/include/actypes.h7
1 files changed, 4 insertions, 3 deletions
diff --git a/source/include/actypes.h b/source/include/actypes.h
index 532d1fa82db2..c7d2c9aa69e4 100644
--- a/source/include/actypes.h
+++ b/source/include/actypes.h
@@ -683,11 +683,12 @@ typedef UINT64 ACPI_INTEGER;
strnlen (a, ACPI_NAMESEG_SIZE) == ACPI_NAMESEG_SIZE)
/*
- * Algorithm to obtain access bit width.
- * Can be used with AccessWidth of ACPI_GENERIC_ADDRESS and AccessSize of
+ * Algorithm to obtain access bit or byte width.
+ * Can be used with AccessSize field of ACPI_GENERIC_ADDRESS and
* ACPI_RESOURCE_GENERIC_REGISTER.
*/
-#define ACPI_ACCESS_BIT_WIDTH(size) (1 << ((size) + 2))
+#define ACPI_ACCESS_BIT_WIDTH(AccessSize) (1 << ((AccessSize) + 2))
+#define ACPI_ACCESS_BYTE_WIDTH(AccessSize) (1 << ((AccessSize) - 1))
/*******************************************************************************