162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci#ifndef __ASM_GENERIC_BITS_PER_LONG 362306a36Sopenharmony_ci#define __ASM_GENERIC_BITS_PER_LONG 462306a36Sopenharmony_ci 562306a36Sopenharmony_ci#include <uapi/asm-generic/bitsperlong.h> 662306a36Sopenharmony_ci 762306a36Sopenharmony_ci 862306a36Sopenharmony_ci#ifdef CONFIG_64BIT 962306a36Sopenharmony_ci#define BITS_PER_LONG 64 1062306a36Sopenharmony_ci#else 1162306a36Sopenharmony_ci#define BITS_PER_LONG 32 1262306a36Sopenharmony_ci#endif /* CONFIG_64BIT */ 1362306a36Sopenharmony_ci 1462306a36Sopenharmony_ci/* 1562306a36Sopenharmony_ci * FIXME: The check currently breaks x86-64 build, so it's 1662306a36Sopenharmony_ci * temporarily disabled. Please fix x86-64 and reenable 1762306a36Sopenharmony_ci */ 1862306a36Sopenharmony_ci#if 0 && BITS_PER_LONG != __BITS_PER_LONG 1962306a36Sopenharmony_ci#error Inconsistent word size. Check asm/bitsperlong.h 2062306a36Sopenharmony_ci#endif 2162306a36Sopenharmony_ci 2262306a36Sopenharmony_ci#ifndef BITS_PER_LONG_LONG 2362306a36Sopenharmony_ci#define BITS_PER_LONG_LONG 64 2462306a36Sopenharmony_ci#endif 2562306a36Sopenharmony_ci 2662306a36Sopenharmony_ci/* 2762306a36Sopenharmony_ci * small_const_nbits(n) is true precisely when it is known at compile-time 2862306a36Sopenharmony_ci * that BITMAP_SIZE(n) is 1, i.e. 1 <= n <= BITS_PER_LONG. This allows 2962306a36Sopenharmony_ci * various bit/bitmap APIs to provide a fast inline implementation. Bitmaps 3062306a36Sopenharmony_ci * of size 0 are very rare, and a compile-time-known-size 0 is most likely 3162306a36Sopenharmony_ci * a sign of error. They will be handled correctly by the bit/bitmap APIs, 3262306a36Sopenharmony_ci * but using the out-of-line functions, so that the inline implementations 3362306a36Sopenharmony_ci * can unconditionally dereference the pointer(s). 3462306a36Sopenharmony_ci */ 3562306a36Sopenharmony_ci#define small_const_nbits(nbits) \ 3662306a36Sopenharmony_ci (__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG && (nbits) > 0) 3762306a36Sopenharmony_ci 3862306a36Sopenharmony_ci#endif /* __ASM_GENERIC_BITS_PER_LONG */ 39