+++ /dev/null
-#ifndef _TOOLS_LINUX_BITOPS_H_
-#define _TOOLS_LINUX_BITOPS_H_
-
-#include <asm/types.h>
-#include <linux/kernel.h>
-#include <linux/compiler.h>
-#include <linux/page.h>
-
-#ifndef __WORDSIZE
-#define __WORDSIZE (__SIZEOF_LONG__ * 8)
-#endif
-
-#ifndef BITS_PER_LONG
-# define BITS_PER_LONG __WORDSIZE
-#endif
-
-#define BIT_MASK(nr) (1UL << ((nr) % BITS_PER_LONG))
-#define BIT_WORD(nr) ((nr) / BITS_PER_LONG)
-#define BITS_PER_TYPE(type) (sizeof(type) * BITS_PER_BYTE)
-#define BITS_PER_BYTE 8
-#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
-#define BITS_TO_U64(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(u64))
-#define BITS_TO_U32(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(u32))
-#define BITS_TO_BYTES(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE)
-
-static inline void __set_bit(int nr, volatile unsigned long *addr)
-{
- unsigned long mask = BIT_MASK(nr);
- unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
-
- *p |= mask;
-}
-
-static inline void set_bit(long nr, volatile unsigned long *addr)
-{
- unsigned long mask = BIT_MASK(nr);
- unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
-
- __atomic_or_fetch(p, mask, __ATOMIC_RELAXED);
-}
-
-static inline void __clear_bit(int nr, volatile unsigned long *addr)
-{
- unsigned long mask = BIT_MASK(nr);
- unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
-
- *p &= ~mask;
-}
-
-static inline void clear_bit(long nr, volatile unsigned long *addr)
-{
- unsigned long mask = BIT_MASK(nr);
- unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
-
- __atomic_and_fetch(p, ~mask, __ATOMIC_RELAXED);
-}
-
-static inline int test_bit(long nr, const volatile unsigned long *addr)
-{
- unsigned long mask = BIT_MASK(nr);
- unsigned long *p = ((unsigned long *) addr) + BIT_WORD(nr);
-
- return (*p & mask) != 0;
-}
-
-static inline int __test_and_set_bit(int nr, unsigned long *addr)
-{
- unsigned long mask = BIT_MASK(nr);
- unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
- unsigned long old;
-
- old = *p;
- *p = old | mask;
-
- return (old & mask) != 0;
-}
-
-static inline bool test_and_set_bit(long nr, volatile unsigned long *addr)
-{
- unsigned long mask = BIT_MASK(nr);
- unsigned long *p = ((unsigned long *) addr) + BIT_WORD(nr);
- unsigned long old;
-
- old = __atomic_fetch_or(p, mask, __ATOMIC_RELAXED);
-
- return (old & mask) != 0;
-}
-
-static inline bool test_and_clear_bit(long nr, volatile unsigned long *addr)
-{
- unsigned long mask = BIT_MASK(nr);
- unsigned long *p = ((unsigned long *) addr) + BIT_WORD(nr);
- unsigned long old;
-
- old = __atomic_fetch_and(p, ~mask, __ATOMIC_RELAXED);
-
- return (old & mask) != 0;
-}
-
-static inline void clear_bit_unlock(long nr, volatile unsigned long *addr)
-{
- unsigned long mask = BIT_MASK(nr);
- unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
-
- __atomic_and_fetch(p, ~mask, __ATOMIC_RELEASE);
-}
-
-static inline bool test_and_set_bit_lock(long nr, volatile unsigned long *addr)
-{
- unsigned long mask = BIT_MASK(nr);
- unsigned long *p = ((unsigned long *) addr) + BIT_WORD(nr);
- unsigned long old;
-
- old = __atomic_fetch_or(p, mask, __ATOMIC_ACQUIRE);
-
- return (old & mask) != 0;
-}
-
-#define for_each_set_bit(bit, addr, size) \
- for ((bit) = find_first_bit((addr), (size)); \
- (bit) < (size); \
- (bit) = find_next_bit((addr), (size), (bit) + 1))
-
-/* same as for_each_set_bit() but use bit as value to start with */
-#define for_each_set_bit_from(bit, addr, size) \
- for ((bit) = find_next_bit((addr), (size), (bit)); \
- (bit) < (size); \
- (bit) = find_next_bit((addr), (size), (bit) + 1))
-
-static inline unsigned long hweight_long(unsigned long w)
-{
- return __builtin_popcountl(w);
-}
-
-static inline unsigned long hweight64(u64 w)
-{
- return __builtin_popcount((u32) w) +
- __builtin_popcount(w >> 32);
-}
-
-static inline unsigned long hweight32(u32 w)
-{
- return __builtin_popcount(w);
-}
-
-static inline unsigned long hweight8(unsigned long w)
-{
- return __builtin_popcountl(w);
-}
-
-/**
- * rol64 - rotate a 64-bit value left
- * @word: value to rotate
- * @shift: bits to roll
- */
-static inline __u64 rol64(__u64 word, unsigned int shift)
-{
- return (word << shift) | (word >> (64 - shift));
-}
-
-/**
- * ror64 - rotate a 64-bit value right
- * @word: value to rotate
- * @shift: bits to roll
- */
-static inline __u64 ror64(__u64 word, unsigned int shift)
-{
- return (word >> shift) | (word << (64 - shift));
-}
-
-/**
- * rol32 - rotate a 32-bit value left
- * @word: value to rotate
- * @shift: bits to roll
- */
-static inline __u32 rol32(__u32 word, unsigned int shift)
-{
- return (word << shift) | (word >> ((-shift) & 31));
-}
-
-/**
- * ror32 - rotate a 32-bit value right
- * @word: value to rotate
- * @shift: bits to roll
- */
-static inline __u32 ror32(__u32 word, unsigned int shift)
-{
- return (word >> shift) | (word << (32 - shift));
-}
-
-/**
- * rol16 - rotate a 16-bit value left
- * @word: value to rotate
- * @shift: bits to roll
- */
-static inline __u16 rol16(__u16 word, unsigned int shift)
-{
- return (word << shift) | (word >> (16 - shift));
-}
-
-/**
- * ror16 - rotate a 16-bit value right
- * @word: value to rotate
- * @shift: bits to roll
- */
-static inline __u16 ror16(__u16 word, unsigned int shift)
-{
- return (word >> shift) | (word << (16 - shift));
-}
-
-/**
- * rol8 - rotate an 8-bit value left
- * @word: value to rotate
- * @shift: bits to roll
- */
-static inline __u8 rol8(__u8 word, unsigned int shift)
-{
- return (word << shift) | (word >> (8 - shift));
-}
-
-/**
- * ror8 - rotate an 8-bit value right
- * @word: value to rotate
- * @shift: bits to roll
- */
-static inline __u8 ror8(__u8 word, unsigned int shift)
-{
- return (word >> shift) | (word << (8 - shift));
-}
-
-static inline unsigned long __fls(unsigned long word)
-{
- return (sizeof(word) * 8) - 1 - __builtin_clzl(word);
-}
-
-static inline int fls(int x)
-{
- return x ? sizeof(x) * 8 - __builtin_clz(x) : 0;
-}
-
-static inline int fls64(__u64 x)
-{
-#if BITS_PER_LONG == 32
- __u32 h = x >> 32;
- if (h)
- return fls(h) + 32;
- return fls(x);
-#elif BITS_PER_LONG == 64
- if (x == 0)
- return 0;
- return __fls(x) + 1;
-#endif
-}
-
-static inline unsigned fls_long(unsigned long l)
-{
- if (sizeof(l) == 4)
- return fls(l);
- return fls64(l);
-}
-
-static inline unsigned long __ffs(unsigned long word)
-{
- return __builtin_ctzl(word);
-}
-
-static inline unsigned long __ffs64(u64 word)
-{
-#if BITS_PER_LONG == 32
- if (((u32)word) == 0UL)
- return __ffs((u32)(word >> 32)) + 32;
-#elif BITS_PER_LONG != 64
-#error BITS_PER_LONG not 32 or 64
-#endif
- return __ffs((unsigned long)word);
-}
-
-#define ffz(x) __ffs(~(x))
-
-static inline __attribute__((const))
-unsigned long rounddown_pow_of_two(unsigned long n)
-{
- return 1UL << (fls_long(n) - 1);
-}
-
-#endif
projects / bcachefs-tools-debian / blobdiff