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| author | Jung-uk Kim <jkim@FreeBSD.org> | 2018-01-24 15:42:30 -0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-02-04 08:58:31 +0100 |
| commit | 761f0b82393353507930b6721ae4311a9df2ca36 (patch) | |
| tree | 44e5138751d101dc6f8eabca6bd3d8132dfc35a1 /include/acpi | |
| parent | 0eedae8e5f983aba6fb5c29c8699ecf03c7e50e0 (diff) | |
| download | linux-761f0b82393353507930b6721ae4311a9df2ca36.tar.gz linux-761f0b82393353507930b6721ae4311a9df2ca36.tar.bz2 linux-761f0b82393353507930b6721ae4311a9df2ca36.zip | |
ACPICA: Avoid NULL pointer arithmetic
We should not assume NULL is defined as "(void *)0" because NULL is
an implementation-defined macro. Especially, Clang 6 complains about
it, i.e., "arithmetic on a null pointer treated as a cast from integer
to pointer is a GNU extension".
Signed-off-by: Jung-uk Kim <jkim@free_BSD.org>
Signed-off-by: Erik Schmauss <erik.schmauss@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/acpi')
| -rw-r--r-- | include/acpi/actypes.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h index 31f1be74dd16..f3999ae7a43f 100644 --- a/include/acpi/actypes.h +++ b/include/acpi/actypes.h @@ -485,7 +485,7 @@ typedef u8 acpi_owner_id; /* * Constants with special meanings */ -#define ACPI_ROOT_OBJECT ACPI_ADD_PTR (acpi_handle, NULL, ACPI_MAX_PTR) +#define ACPI_ROOT_OBJECT ACPI_ADD_PTR (acpi_handle, (void *) 0, ACPI_MAX_PTR) #define ACPI_WAIT_FOREVER 0xFFFF /* u16, as per ACPI spec */ #define ACPI_DO_NOT_WAIT 0 @@ -536,9 +536,9 @@ typedef u64 acpi_integer; /* Pointer/Integer type conversions */ -#define ACPI_TO_POINTER(i) ACPI_ADD_PTR (void, (void *) NULL,(acpi_size) i) -#define ACPI_TO_INTEGER(p) ACPI_PTR_DIFF (p, (void *) NULL) -#define ACPI_OFFSET(d, f) ACPI_PTR_DIFF (&(((d *) 0)->f), (void *) NULL) +#define ACPI_TO_POINTER(i) ACPI_ADD_PTR (void, (void *) 0, (acpi_size) (i)) +#define ACPI_TO_INTEGER(p) ACPI_PTR_DIFF (p, (void *) 0) +#define ACPI_OFFSET(d, f) ACPI_PTR_DIFF (&(((d *) 0)->f), (void *) 0) #define ACPI_PHYSADDR_TO_PTR(i) ACPI_TO_POINTER(i) #define ACPI_PTR_TO_PHYSADDR(i) ACPI_TO_INTEGER(i) |