1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 /* const.h: Macros for dealing with constants. */
4 #ifndef _UAPI_LINUX_CONST_H
5 #define _UAPI_LINUX_CONST_H
7 /* Some constant macros are used in both assembler and
8 * C code. Therefore we cannot annotate them always with
9 * 'UL' and other type specifiers unilaterally. We
10 * use the following macros to deal with this.
12 * Similarly, _AT() will cast an expression with a type in C, but
13 * leave it unchanged in asm.
20 #define __AC(X,Y) (X##Y)
21 #define _AC(X,Y) __AC(X,Y)
22 #define _AT(T,X) ((T)(X))
25 #define _UL(x) (_AC(x, UL))
26 #define _ULL(x) (_AC(x, ULL))
28 #define _BITUL(x) (_UL(1) << (x))
29 #define _BITULL(x) (_ULL(1) << (x))
31 #define __ALIGN_KERNEL(x, a) __ALIGN_KERNEL_MASK(x, (__typeof__(x))(a) - 1)
32 #define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask))
34 #define __KERNEL_DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
36 #endif /* _UAPI_LINUX_CONST_H */