cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

bitsperlong.h (1207B)


      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 */