| /* 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 */ |
