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      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 #endif /* !(_LINUX_CONST_H) */
     25