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- /*
- * const.h: Macros for dealing with constants.
- *
- * SPDX-License-Identifier: GPL-2.0
- */
- #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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