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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _TOOLS_LINUX_BITOPS_H_
#define _TOOLS_LINUX_BITOPS_H_
#include <asm/types.h>
#include <limits.h>
#ifndef __WORDSIZE
#define __WORDSIZE (__SIZEOF_LONG__ * 8)
#endif
#ifndef BITS_PER_LONG
# define BITS_PER_LONG __WORDSIZE
#endif
#include <linux/bits.h>
#include <linux/compiler.h>
#define BITS_PER_TYPE(type) (sizeof(type) * BITS_PER_BYTE)
#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(long))
#define BITS_TO_U64(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(u64))
#define BITS_TO_U32(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(u32))
#define BITS_TO_BYTES(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(char))
#define BYTES_TO_BITS(nb) ((nb) * BITS_PER_BYTE)
extern unsigned int __sw_hweight8(unsigned int w);
extern unsigned int __sw_hweight16(unsigned int w);
extern unsigned int __sw_hweight32(unsigned int w);
extern unsigned long __sw_hweight64(__u64 w);
/*
* Include this here because some architectures need generic_ffs/fls in
* scope
*
* XXX: this needs to be asm/bitops.h, when we get to per arch optimizations
*/
#include <asm-generic/bitops.h>
#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))
#define for_each_clear_bit(bit, addr, size) \
for ((bit) = find_first_zero_bit((addr), (size)); \
(bit) < (size); \
(bit) = find_next_zero_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 sizeof(w) == 4 ? hweight32(w) : hweight64(w);
}
static inline unsigned fls_long(unsigned long l)
{
if (sizeof(l) == 4)
return fls(l);
return fls64(l);
}
/**
* 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));
}
#endif
| Name | Type | Size | Permission | Actions |
|---|---|---|---|---|
| sched | Folder | 0755 |
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| unaligned | Folder | 0755 |
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| align.h | File | 339 B | 0644 |
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| arm-smccc.h | File | 5.63 KB | 0644 |
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| atomic.h | File | 363 B | 0644 |
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| bitfield.h | File | 5.33 KB | 0644 |
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| bitmap.h | File | 4.82 KB | 0644 |
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| bitops.h | File | 2.15 KB | 0644 |
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| bits.h | File | 1.17 KB | 0644 |
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| btf_ids.h | File | 5.97 KB | 0644 |
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| bug.h | File | 442 B | 0644 |
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| build_bug.h | File | 3.04 KB | 0644 |
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| compiler-gcc.h | File | 1.24 KB | 0644 |
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| compiler.h | File | 5.82 KB | 0644 |
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| compiler_types.h | File | 1.09 KB | 0644 |
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| const.h | File | 421 B | 0644 |
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| coresight-pmu.h | File | 2.32 KB | 0644 |
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| ctype.h | File | 1.9 KB | 0644 |
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| debug_locks.h | File | 288 B | 0644 |
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| delay.h | File | 117 B | 0644 |
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| err.h | File | 1.99 KB | 0644 |
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| export.h | File | 129 B | 0644 |
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| filter.h | File | 9.59 KB | 0644 |
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| find.h | File | 5.77 KB | 0644 |
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| ftrace.h | File | 120 B | 0644 |
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| gfp.h | File | 322 B | 0644 |
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| gfp_types.h | File | 46 B | 0644 |
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| hardirq.h | File | 280 B | 0644 |
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| hash.h | File | 2.93 KB | 0644 |
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| hashtable.h | File | 4.44 KB | 0644 |
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| interrupt.h | File | 129 B | 0644 |
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| interval_tree_generic.h | File | 6.7 KB | 0644 |
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| irqflags.h | File | 1.37 KB | 0644 |
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| jhash.h | File | 4.46 KB | 0644 |
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| kallsyms.h | File | 646 B | 0644 |
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| kconfig.h | File | 2.39 KB | 0644 |
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| kern_levels.h | File | 954 B | 0644 |
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| kernel.h | File | 2.64 KB | 0644 |
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| linkage.h | File | 123 B | 0644 |
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| list.h | File | 22.48 KB | 0644 |
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| list_sort.h | File | 374 B | 0644 |
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| lockdep.h | File | 1.43 KB | 0644 |
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| log2.h | File | 4.46 KB | 0644 |
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| math.h | File | 764 B | 0644 |
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| math64.h | File | 1.22 KB | 0644 |
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| module.h | File | 270 B | 0644 |
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| mutex.h | File | 117 B | 0644 |
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| nmi.h | File | 0 B | 0644 |
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| numa.h | File | 292 B | 0644 |
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| objtool_types.h | File | 1.8 KB | 0644 |
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| overflow.h | File | 4.11 KB | 0644 |
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| poison.h | File | 2.5 KB | 0644 |
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| proc_fs.h | File | 123 B | 0644 |
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| rbtree.h | File | 9.32 KB | 0644 |
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| rbtree_augmented.h | File | 9.34 KB | 0644 |
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| rcu.h | File | 437 B | 0644 |
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| refcount.h | File | 4.11 KB | 0644 |
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| ring_buffer.h | File | 2.4 KB | 0644 |
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| rwsem.h | File | 920 B | 0644 |
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| seq_file.h | File | 126 B | 0644 |
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| sizes.h | File | 1.12 KB | 0644 |
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| slab.h | File | 1.17 KB | 0644 |
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| spinlock.h | File | 1.24 KB | 0644 |
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| stacktrace.h | File | 678 B | 0644 |
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| static_call_types.h | File | 2.74 KB | 0644 |
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| string.h | File | 1.4 KB | 0644 |
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| stringify.h | File | 380 B | 0644 |
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| time64.h | File | 347 B | 0644 |
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| types.h | File | 1.72 KB | 0644 |
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| zalloc.h | File | 252 B | 0644 |
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