diff options
| author | Nicolas Dichtel <nicolas.dichtel@6wind.com> | 2017-01-13 11:46:39 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@armlinux.org.uk> | 2017-01-13 17:02:38 +0000 |
| commit | ed79c9d34f4f4c5842b66cab840315e7ac29f666 (patch) | |
| tree | d073a53ff78844c9a763c076b21c5348eb4cffec /arch/arm/include/uapi/asm | |
| parent | ddc37832a1349f474c4532de381498020ed71d31 (diff) | |
ARM: put types.h in uapi
Due to the way kbuild works, this header was unintentionally exported
back in 2013 when it was created, despite it not being in a uapi/
directory. This is very non-intuitive behaviour by Kbuild.
However, we've had this include exported to userland for almost four
years, and searching google for "ARM types.h __UINTPTR_TYPE__" gives
no hint that anyone has complained about it. So, let's make it
officially exported in this state.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'arch/arm/include/uapi/asm')
| -rw-r--r-- | arch/arm/include/uapi/asm/types.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/arm/include/uapi/asm/types.h b/arch/arm/include/uapi/asm/types.h new file mode 100644 index 000000000000..9435a42f575e --- /dev/null +++ b/arch/arm/include/uapi/asm/types.h @@ -0,0 +1,40 @@ +#ifndef _UAPI_ASM_TYPES_H +#define _UAPI_ASM_TYPES_H + +#include <asm-generic/int-ll64.h> + +/* + * The C99 types uintXX_t that are usually defined in 'stdint.h' are not as + * unambiguous on ARM as you would expect. For the types below, there is a + * difference on ARM between GCC built for bare metal ARM, GCC built for glibc + * and the kernel itself, which results in build errors if you try to build with + * -ffreestanding and include 'stdint.h' (such as when you include 'arm_neon.h' + * in order to use NEON intrinsics) + * + * As the typedefs for these types in 'stdint.h' are based on builtin defines + * supplied by GCC, we can tweak these to align with the kernel's idea of those + * types, so 'linux/types.h' and 'stdint.h' can be safely included from the same + * source file (provided that -ffreestanding is used). + * + * int32_t uint32_t uintptr_t + * bare metal GCC long unsigned long unsigned int + * glibc GCC int unsigned int unsigned int + * kernel int unsigned int unsigned long + */ + +#ifdef __INT32_TYPE__ +#undef __INT32_TYPE__ +#define __INT32_TYPE__ int +#endif + +#ifdef __UINT32_TYPE__ +#undef __UINT32_TYPE__ +#define __UINT32_TYPE__ unsigned int +#endif + +#ifdef __UINTPTR_TYPE__ +#undef __UINTPTR_TYPE__ +#define __UINTPTR_TYPE__ unsigned long +#endif + +#endif /* _UAPI_ASM_TYPES_H */ |