From 69ee810cbbca8d6834cdbbb31a8a00fa9ad91c47 Mon Sep 17 00:00:00 2001 From: Lv Zheng Date: Thu, 21 May 2015 10:31:24 +0800 Subject: [PATCH] ACPICA: ACPI 6.0: Add ACPI_SUB_PTR(). ACPICA commit 5de82757aef5d6163e37064033aacbce193abbca Using a minus number with ACPI_ADD_PTR() will cause compiler warnings, such warnings cannot be eliminated by force casting an unsigned value to a signed value. This patch thus introduces ACPI_SUB_PTR() to be used with minus numbers. Lv Zheng. Link: https://github.com/acpica/acpica/commit/5de82757 Signed-off-by: Lv Zheng Signed-off-by: Bob Moore Signed-off-by: Rafael J. Wysocki --- include/acpi/actypes.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h index a9d33e8c33b7..63fd7f5e9fb3 100644 --- a/include/acpi/actypes.h +++ b/include/acpi/actypes.h @@ -525,6 +525,7 @@ typedef u64 acpi_integer; #define ACPI_CAST_PTR(t, p) ((t *) (acpi_uintptr_t) (p)) #define ACPI_CAST_INDIRECT_PTR(t, p) ((t **) (acpi_uintptr_t) (p)) #define ACPI_ADD_PTR(t, a, b) ACPI_CAST_PTR (t, (ACPI_CAST_PTR (u8, (a)) + (acpi_size)(b))) +#define ACPI_SUB_PTR(t, a, b) ACPI_CAST_PTR (t, (ACPI_CAST_PTR (u8, (a)) - (acpi_size)(b))) #define ACPI_PTR_DIFF(a, b) (acpi_size) (ACPI_CAST_PTR (u8, (a)) - ACPI_CAST_PTR (u8, (b))) /* Pointer/Integer type conversions */