Release 4.12 include/uapi/linux/const.h

/* const.h: Macros for dealing with constants.  */

#ifndef _LINUX_CONST_H

#define _LINUX_CONST_H

/* Some constant macros are used in both assembler and
 * C code.  Therefore we cannot annotate them always with
 * 'UL' and other type specifiers unilaterally.  We
 * use the following macros to deal with this.
 *
 * Similarly, _AT() will cast an expression with a type in C, but
 * leave it unchanged in asm.
 */

#ifdef __ASSEMBLY__

#define _AC(X,Y)	X

#define _AT(T,X)	X
#else

#define __AC(X,Y)	(X##Y)

#define _AC(X,Y)	__AC(X,Y)

#define _AT(T,X)	((T)(X))
#endif


#define _BITUL(x)	(_AC(1,UL) << (x))

#define _BITULL(x)	(_AC(1,ULL) << (x))

#endif /* !(_LINUX_CONST_H) */
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