1*aaa6ef8aSArnaldo Carvalho de Melo /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2*aaa6ef8aSArnaldo Carvalho de Melo /* const.h: Macros for dealing with constants. */ 3*aaa6ef8aSArnaldo Carvalho de Melo 4*aaa6ef8aSArnaldo Carvalho de Melo #ifndef _UAPI_LINUX_CONST_H 5*aaa6ef8aSArnaldo Carvalho de Melo #define _UAPI_LINUX_CONST_H 6*aaa6ef8aSArnaldo Carvalho de Melo 7*aaa6ef8aSArnaldo Carvalho de Melo /* Some constant macros are used in both assembler and 8*aaa6ef8aSArnaldo Carvalho de Melo * C code. Therefore we cannot annotate them always with 9*aaa6ef8aSArnaldo Carvalho de Melo * 'UL' and other type specifiers unilaterally. We 10*aaa6ef8aSArnaldo Carvalho de Melo * use the following macros to deal with this. 11*aaa6ef8aSArnaldo Carvalho de Melo * 12*aaa6ef8aSArnaldo Carvalho de Melo * Similarly, _AT() will cast an expression with a type in C, but 13*aaa6ef8aSArnaldo Carvalho de Melo * leave it unchanged in asm. 14*aaa6ef8aSArnaldo Carvalho de Melo */ 15*aaa6ef8aSArnaldo Carvalho de Melo 16*aaa6ef8aSArnaldo Carvalho de Melo #ifdef __ASSEMBLY__ 17*aaa6ef8aSArnaldo Carvalho de Melo #define _AC(X,Y) X 18*aaa6ef8aSArnaldo Carvalho de Melo #define _AT(T,X) X 19*aaa6ef8aSArnaldo Carvalho de Melo #else 20*aaa6ef8aSArnaldo Carvalho de Melo #define __AC(X,Y) (X##Y) 21*aaa6ef8aSArnaldo Carvalho de Melo #define _AC(X,Y) __AC(X,Y) 22*aaa6ef8aSArnaldo Carvalho de Melo #define _AT(T,X) ((T)(X)) 23*aaa6ef8aSArnaldo Carvalho de Melo #endif 24*aaa6ef8aSArnaldo Carvalho de Melo 25*aaa6ef8aSArnaldo Carvalho de Melo #define _UL(x) (_AC(x, UL)) 26*aaa6ef8aSArnaldo Carvalho de Melo #define _ULL(x) (_AC(x, ULL)) 27*aaa6ef8aSArnaldo Carvalho de Melo 28*aaa6ef8aSArnaldo Carvalho de Melo #define _BITUL(x) (_UL(1) << (x)) 29*aaa6ef8aSArnaldo Carvalho de Melo #define _BITULL(x) (_ULL(1) << (x)) 30*aaa6ef8aSArnaldo Carvalho de Melo 31*aaa6ef8aSArnaldo Carvalho de Melo #endif /* _UAPI_LINUX_CONST_H */ 32