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linux/types: import __aligned_x64 from the kernel 

need it by upcoming EFI GPT support

Cc: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Jean-Christophe PLAGNIOL-VILLARD 2013-02-16 14:47:05 +01:00 committed by Sascha Hauer
parent 3fe6f23b76
commit ee2599db24
1 changed files with 13 additions and 0 deletions
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13
include/linux/types.h
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@ -142,6 +142,19 @@ typedef __u64 __bitwise __be64;
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)))
#define __aligned_be64 __be64 __attribute__((aligned(8)))
#define __aligned_le64 __le64 __attribute__((aligned(8)))
#ifdef CONFIG_PHYS_ADDR_T_64BIT
typedef u64 phys_addr_t;
typedef u64 phys_size_t;