| --- a/include/linux/types.h 2010-08-04 10:45:59.000000000 -0700 |
| +++ b/include/linux/types.h 2014-06-06 15:11:42.439540137 -0700 |
| @@ -33,6 +33,17 @@ |
| |
| typedef __u16 __bitwise __sum16; |
| typedef __u32 __bitwise __wsum; |
| +/* |
| + * aligned_u64 should be used in defining kernel<->userspace ABIs to avoid |
| + * common 32/64-bit compat problems. |
| + * 64-bit values align to 4-byte boundaries on x86_32 (and possibly other |
| + * architectures) and to 8-byte boundaries on 64-bit architectures. The new |
| + * aligned_64 type enforces 8-byte alignment so that structs containing |
| + * aligned_64 values have the same alignment on 32-bit and 64-bit architectures. |
| + * No conversions are necessary between 32-bit user-space and a 64-bit kernel. |
| + */ |
| +#define __aligned_u64 __u64 __attribute__((aligned(8))) |
| + |
| |
| #endif /* __ASSEMBLY__ */ |
| #endif /* _LINUX_TYPES_H */ |
