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
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