renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2025-01-23 04:54:01 +08:00
Code

ACPICA: Use uintptr_t and offsetof() in Linux kernel builds

Browse Source 
To avoid "performing pointer subtraction with a null pointer has
undefined behavior" compiler warnings, use uintptr_t and offsetof()
that are always available during Linux kernel builds to define
acpi_uintptr_t and the ACPI_TO_INTEGER() and ACPI_OFFSET() macros.

Based on earlier proposal from Arnd Bergmann.

Link: https://lore.kernel.org/linux-acpi/20210927121338.938994-1-arnd@kernel.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Rafael J. Wysocki 2022-01-11 16:55:25 +01:00
parent e783362eb5
commit ae57857b9b
2 changed files with 9 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/acpi/actypes.h
View File

@ -507,8 +507,12 @@ typedef u64 acpi_integer;
/* Pointer/Integer type conversions */
#define ACPI_TO_POINTER(i) ACPI_CAST_PTR (void, (acpi_size) (i))
#ifndef ACPI_TO_INTEGER
#define ACPI_TO_INTEGER(p) ACPI_PTR_DIFF (p, (void *) 0)
#endif
#ifndef ACPI_OFFSET
#define ACPI_OFFSET(d, f) ACPI_PTR_DIFF (&(((d *) 0)->f), (void *) 0)
#endif
#define ACPI_PTR_TO_PHYSADDR(i) ACPI_TO_INTEGER(i)
/* Optimizations for 4-character (32-bit) acpi_name manipulation */

5
include/acpi/platform/aclinux.h
View File

@ -114,6 +114,11 @@
#define acpi_raw_spinlock raw_spinlock_t *
#define acpi_cpu_flags unsigned long
#define acpi_uintptr_t uintptr_t
#define ACPI_TO_INTEGER(p) ((uintptr_t)(p))
#define ACPI_OFFSET(d, f) offsetof(d, f)
/* Use native linux version of acpi_os_allocate_zeroed */
#define USE_NATIVE_ALLOCATE_ZEROED