Viewing file:  bitsperlong.h (1.18 KB) -rw-r--r--
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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_GENERIC_BITS_PER_LONG
#define __ASM_GENERIC_BITS_PER_LONG
#include <uapi/asm-generic/bitsperlong.h>
#ifdef CONFIG_64BIT
#define BITS_PER_LONG 64
#else
#define BITS_PER_LONG 32
#endif /* CONFIG_64BIT */
/*
* FIXME: The check currently breaks x86-64 build, so it's
* temporarily disabled. Please fix x86-64 and reenable
*/
#if 0 && BITS_PER_LONG != __BITS_PER_LONG
#error Inconsistent word size. Check asm/bitsperlong.h
#endif
#ifndef BITS_PER_LONG_LONG
#define BITS_PER_LONG_LONG 64
#endif
/*
* small_const_nbits(n) is true precisely when it is known at compile-time
* that BITMAP_SIZE(n) is 1, i.e. 1 <= n <= BITS_PER_LONG. This allows
* various bit/bitmap APIs to provide a fast inline implementation. Bitmaps
* of size 0 are very rare, and a compile-time-known-size 0 is most likely
* a sign of error. They will be handled correctly by the bit/bitmap APIs,
* but using the out-of-line functions, so that the inline implementations
* can unconditionally dereference the pointer(s).
*/
#define small_const_nbits(nbits) \
(__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG && (nbits) > 0)
#endif /* __ASM_GENERIC_BITS_PER_LONG */
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