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