| /* 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 */ |