| /* 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 | |
| /* Some constant macros are used in both assembler and | |
| * C code. Therefore we cannot annotate them always with | |
| * 'UL' and other type specifiers unilaterally. We | |
| * use the following macros to deal with this. | |
| * | |
| * Similarly, _AT() will cast an expression with a type in C, but | |
| * leave it unchanged in asm. | |
| */ | |
| #ifdef __ASSEMBLY__ | |
| #define _AC(X,Y) X | |
| #define _AT(T,X) X | |
| #else | |
| #define __AC(X,Y) (X##Y) | |
| #define _AC(X,Y) __AC(X,Y) | |
| #define _AT(T,X) ((T)(X)) | |
| #endif | |
| #define _UL(x) (_AC(x, UL)) | |
| #define _ULL(x) (_AC(x, ULL)) | |
| #define _BITUL(x) (_UL(1) << (x)) | |
| #define _BITULL(x) (_ULL(1) << (x)) | |
| #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 /* _LINUX_CONST_H */ |