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36 lines
1002 B
36 lines
1002 B
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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/* const.h: Macros for dealing with constants. */ |
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#ifndef _UAPI_LINUX_CONST_H |
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#define _UAPI_LINUX_CONST_H |
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/* Some constant macros are used in both assembler and |
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* C code. Therefore we cannot annotate them always with |
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* 'UL' and other type specifiers unilaterally. We |
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* use the following macros to deal with this. |
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* |
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* Similarly, _AT() will cast an expression with a type in C, but |
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* leave it unchanged in asm. |
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*/ |
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#ifdef __ASSEMBLY__ |
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#define _AC(X,Y) X |
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#define _AT(T,X) X |
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#else |
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#define __AC(X,Y) (X##Y) |
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#define _AC(X,Y) __AC(X,Y) |
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#define _AT(T,X) ((T)(X)) |
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#endif |
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#define _UL(x) (_AC(x, UL)) |
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#define _ULL(x) (_AC(x, ULL)) |
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#define _BITUL(x) (_UL(1) << (x)) |
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#define _BITULL(x) (_ULL(1) << (x)) |
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#define __ALIGN_KERNEL(x, a) __ALIGN_KERNEL_MASK(x, (typeof(x))(a) - 1) |
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#define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask)) |
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#define __KERNEL_DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) |
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#endif /* _UAPI_LINUX_CONST_H */
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