diff options
Diffstat (limited to 'include/uapi/linux/const.h')
| -rw-r--r-- | include/uapi/linux/const.h | 36 |
1 files changed, 31 insertions, 5 deletions
diff --git a/include/uapi/linux/const.h b/include/uapi/linux/const.h index c872bfd25e13..b8f629ef135f 100644 --- a/include/uapi/linux/const.h +++ b/include/uapi/linux/const.h @@ -1,7 +1,8 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* const.h: Macros for dealing with constants. */ -#ifndef _LINUX_CONST_H -#define _LINUX_CONST_H +#ifndef _UAPI_LINUX_CONST_H +#define _UAPI_LINUX_CONST_H /* Some constant macros are used in both assembler and * C code. Therefore we cannot annotate them always with @@ -21,7 +22,32 @@ #define _AT(T,X) ((T)(X)) #endif -#define _BITUL(x) (_AC(1,UL) << (x)) -#define _BITULL(x) (_AC(1,ULL) << (x)) +#define _UL(x) (_AC(x, UL)) +#define _ULL(x) (_AC(x, ULL)) -#endif /* !(_LINUX_CONST_H) */ +#define _BITUL(x) (_UL(1) << (x)) +#define _BITULL(x) (_ULL(1) << (x)) + +#if !defined(__ASSEMBLY__) +/* + * Missing asm support + * + * __BIT128() would not work in the asm code, as it shifts an + * 'unsigned __int128' data type as direct representation of + * 128 bit constants is not supported in the gcc compiler, as + * they get silently truncated. + * + * TODO: Please revisit this implementation when gcc compiler + * starts representing 128 bit constants directly like long + * and unsigned long etc. Subsequently drop the comment for + * GENMASK_U128() which would then start supporting asm code. + */ +#define _BIT128(x) ((unsigned __int128)(1) << (x)) +#endif + +#define __ALIGN_KERNEL(x, a) __ALIGN_KERNEL_MASK(x, (__typeof__(x))(a) - 1) +#define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask)) + +#define __KERNEL_DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) + +#endif /* _UAPI_LINUX_CONST_H */ |