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const.h
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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) */