1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux 1 2 /* const.h: Macros for dealing with constants. 3 4 #ifndef _UAPI_LINUX_CONST_H 5 #define _UAPI_LINUX_CONST_H 6 7 /* Some constant macros are used in both assem 8 * C code. Therefore we cannot annotate them 9 * 'UL' and other type specifiers unilaterally 10 * use the following macros to deal with this. 11 * 12 * Similarly, _AT() will cast an expression wi 13 * leave it unchanged in asm. 14 */ 15 16 #ifdef __ASSEMBLY__ 17 #define _AC(X,Y) X 18 #define _AT(T,X) X 19 #else 20 #define __AC(X,Y) (X##Y) 21 #define _AC(X,Y) __AC(X,Y) 22 #define _AT(T,X) ((T)(X)) 23 #endif 24 25 #define _UL(x) (_AC(x, UL)) 26 #define _ULL(x) (_AC(x, ULL)) 27 28 #define _BITUL(x) (_UL(1) << (x)) 29 #define _BITULL(x) (_ULL(1) << (x)) 30 31 #if !defined(__ASSEMBLY__) 32 /* 33 * Missing asm support 34 * 35 * __BIT128() would not work in the asm code, 36 * 'unsigned __init128' data type as direct re 37 * 128 bit constants is not supported in the g 38 * they get silently truncated. 39 * 40 * TODO: Please revisit this implementation wh 41 * starts representing 128 bit constants direc 42 * and unsigned long etc. Subsequently drop th 43 * GENMASK_U128() which would then start suppo 44 */ 45 #define _BIT128(x) ((unsigned __int128)(1 46 #endif 47 48 #define __ALIGN_KERNEL(x, a) __ALIG 49 #define __ALIGN_KERNEL_MASK(x, mask) (((x) 50 51 #define __KERNEL_DIV_ROUND_UP(n, d) (((n) + (d 52 53 #endif /* _UAPI_LINUX_CONST_H */ 54
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