diff options
| author | Lv Zheng <lv.zheng@intel.com> | 2015-05-21 10:31:24 +0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-05-22 03:22:20 +0200 |
| commit | 69ee810cbbca8d6834cdbbb31a8a00fa9ad91c47 (patch) | |
| tree | 591d7cae72984b471c609557edfc586a7a0e35cb | |
| parent | 0cff8dc0099f6d4f7431181918b37a472bcd1bbb (diff) | |
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 <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | include/acpi/actypes.h | 1 |
1 files changed, 1 insertions, 0 deletions
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 */ |