1*858ea5e5SAndroid Build Coastguard Worker /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2*858ea5e5SAndroid Build Coastguard Worker /* const.h: Macros for dealing with constants. */ 3*858ea5e5SAndroid Build Coastguard Worker 4*858ea5e5SAndroid Build Coastguard Worker #ifndef _UAPI_LINUX_CONST_H 5*858ea5e5SAndroid Build Coastguard Worker #define _UAPI_LINUX_CONST_H 6*858ea5e5SAndroid Build Coastguard Worker 7*858ea5e5SAndroid Build Coastguard Worker /* Some constant macros are used in both assembler and 8*858ea5e5SAndroid Build Coastguard Worker * C code. Therefore we cannot annotate them always with 9*858ea5e5SAndroid Build Coastguard Worker * 'UL' and other type specifiers unilaterally. We 10*858ea5e5SAndroid Build Coastguard Worker * use the following macros to deal with this. 11*858ea5e5SAndroid Build Coastguard Worker * 12*858ea5e5SAndroid Build Coastguard Worker * Similarly, _AT() will cast an expression with a type in C, but 13*858ea5e5SAndroid Build Coastguard Worker * leave it unchanged in asm. 14*858ea5e5SAndroid Build Coastguard Worker */ 15*858ea5e5SAndroid Build Coastguard Worker 16*858ea5e5SAndroid Build Coastguard Worker #ifdef __ASSEMBLY__ 17*858ea5e5SAndroid Build Coastguard Worker #define _AC(X,Y) X 18*858ea5e5SAndroid Build Coastguard Worker #define _AT(T,X) X 19*858ea5e5SAndroid Build Coastguard Worker #else 20*858ea5e5SAndroid Build Coastguard Worker #define __AC(X,Y) (X##Y) 21*858ea5e5SAndroid Build Coastguard Worker #define _AC(X,Y) __AC(X,Y) 22*858ea5e5SAndroid Build Coastguard Worker #define _AT(T,X) ((T)(X)) 23*858ea5e5SAndroid Build Coastguard Worker #endif 24*858ea5e5SAndroid Build Coastguard Worker 25*858ea5e5SAndroid Build Coastguard Worker #define _UL(x) (_AC(x, UL)) 26*858ea5e5SAndroid Build Coastguard Worker #define _ULL(x) (_AC(x, ULL)) 27*858ea5e5SAndroid Build Coastguard Worker 28*858ea5e5SAndroid Build Coastguard Worker #define _BITUL(x) (_UL(1) << (x)) 29*858ea5e5SAndroid Build Coastguard Worker #define _BITULL(x) (_ULL(1) << (x)) 30*858ea5e5SAndroid Build Coastguard Worker 31*858ea5e5SAndroid Build Coastguard Worker #define __ALIGN_KERNEL(x, a) __ALIGN_KERNEL_MASK(x, (__typeof__(x))(a) - 1) 32*858ea5e5SAndroid Build Coastguard Worker #define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask)) 33*858ea5e5SAndroid Build Coastguard Worker 34*858ea5e5SAndroid Build Coastguard Worker #define __KERNEL_DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) 35*858ea5e5SAndroid Build Coastguard Worker 36*858ea5e5SAndroid Build Coastguard Worker #endif /* _UAPI_LINUX_CONST_H */ 37