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       1  /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
       2  /* const.h: Macros for dealing with constants.  */
       3  
       4  #ifndef _LINUX_CONST_H
       5  #define _LINUX_CONST_H
       6  
       7  /* Some constant macros are used in both assembler and
       8   * C code.  Therefore we cannot annotate them always with
       9   * 'UL' and other type specifiers unilaterally.  We
      10   * use the following macros to deal with this.
      11   *
      12   * Similarly, _AT() will cast an expression with a type in C, but
      13   * leave it unchanged in asm.
      14   */
      15  
      16  #ifdef __ASSEMBLY__
      17  #define _AC(X,Y)	X
      18  #define _AT(T,X)	X
      19  #else
      20  #define __AC(X,Y)	(X##Y)
      21  #define _AC(X,Y)	__AC(X,Y)
      22  #define _AT(T,X)	((T)(X))
      23  #endif
      24  
      25  #define _UL(x)		(_AC(x, UL))
      26  #define _ULL(x)		(_AC(x, ULL))
      27  
      28  #define _BITUL(x)	(_UL(1) << (x))
      29  #define _BITULL(x)	(_ULL(1) << (x))
      30  
      31  #define __ALIGN_KERNEL(x, a)		__ALIGN_KERNEL_MASK(x, (__typeof__(x))(a) - 1)
      32  #define __ALIGN_KERNEL_MASK(x, mask)	(((x) + (mask)) & ~(mask))
      33  
      34  #define __KERNEL_DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
      35  
      36  #endif /* _LINUX_CONST_H */