1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef __ASM_GENERIC_BITS_PER_LONG 3#define __ASM_GENERIC_BITS_PER_LONG 4 5#include <uapi/asm-generic/bitsperlong.h> 6 7 8#ifdef CONFIG_64BIT 9#define BITS_PER_LONG 64 10#else 11#define BITS_PER_LONG 32 12#endif /* CONFIG_64BIT */ 13 14/* 15 * FIXME: The check currently breaks x86-64 build, so it's 16 * temporarily disabled. Please fix x86-64 and reenable 17 */ 18#if 0 && BITS_PER_LONG != __BITS_PER_LONG 19#error Inconsistent word size. Check asm/bitsperlong.h 20#endif 21 22#ifndef BITS_PER_LONG_LONG 23#define BITS_PER_LONG_LONG 64 24#endif 25 26/* 27 * small_const_nbits(n) is true precisely when it is known at compile-time 28 * that BITMAP_SIZE(n) is 1, i.e. 1 <= n <= BITS_PER_LONG. This allows 29 * various bit/bitmap APIs to provide a fast inline implementation. Bitmaps 30 * of size 0 are very rare, and a compile-time-known-size 0 is most likely 31 * a sign of error. They will be handled correctly by the bit/bitmap APIs, 32 * but using the out-of-line functions, so that the inline implementations 33 * can unconditionally dereference the pointer(s). 34 */ 35#define small_const_nbits(nbits) \ 36 (__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG && (nbits) > 0) 37 38#endif /* __ASM_GENERIC_BITS_PER_LONG */ 39