Contributors: 29
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Sebastian Andrzej Siewior |
103 |
20.72% |
5 |
9.26% |
| Thomas Gleixner |
96 |
19.32% |
7 |
12.96% |
| Ingo Molnar |
56 |
11.27% |
5 |
9.26% |
| Andrew Morton |
41 |
8.25% |
3 |
5.56% |
| Peter Zijlstra |
27 |
5.43% |
3 |
5.56% |
| Jamie Lokier |
26 |
5.23% |
1 |
1.85% |
| Joey Gouly |
24 |
4.83% |
1 |
1.85% |
| Rusty Russell |
20 |
4.02% |
3 |
5.56% |
| Dominik Brodowski |
16 |
3.22% |
1 |
1.85% |
| Eric Dumazet |
11 |
2.21% |
1 |
1.85% |
| Suren Baghdasaryan |
10 |
2.01% |
1 |
1.85% |
| Linus Torvalds |
9 |
1.81% |
3 |
5.56% |
| Mathieu Desnoyers |
8 |
1.61% |
1 |
1.85% |
| Christoph Hellwig |
6 |
1.21% |
1 |
1.85% |
| Nico Pitre |
5 |
1.01% |
2 |
3.70% |
| MinChan Kim |
5 |
1.01% |
1 |
1.85% |
| Benjamin Herrenschmidt |
5 |
1.01% |
2 |
3.70% |
| Frank Mayhar |
5 |
1.01% |
2 |
3.70% |
| Motohiro Kosaki |
4 |
0.80% |
1 |
1.85% |
| Colin Cross |
3 |
0.60% |
1 |
1.85% |
| Jan Engelhardt |
3 |
0.60% |
1 |
1.85% |
| Alexey Dobriyan |
3 |
0.60% |
1 |
1.85% |
| Hugh Dickins |
3 |
0.60% |
1 |
1.85% |
| Pierre Peiffer |
2 |
0.40% |
1 |
1.85% |
| David Woodhouse |
2 |
0.40% |
1 |
1.85% |
| Christoph Lameter |
1 |
0.20% |
1 |
1.85% |
| Greg Kroah-Hartman |
1 |
0.20% |
1 |
1.85% |
| David Mosberger-Tang |
1 |
0.20% |
1 |
1.85% |
| David Howells |
1 |
0.20% |
1 |
1.85% |
| Total |
497 |
|
54 |
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_FUTEX_H
#define _LINUX_FUTEX_H
#include <linux/sched.h>
#include <linux/ktime.h>
#include <linux/mm_types.h>
#include <uapi/linux/futex.h>
struct inode;
struct task_struct;
/*
* Futexes are matched on equal values of this key.
* The key type depends on whether it's a shared or private mapping.
* Don't rearrange members without looking at hash_futex().
*
* offset is aligned to a multiple of sizeof(u32) (== 4) by definition.
* We use the two low order bits of offset to tell what is the kind of key :
* 00 : Private process futex (PTHREAD_PROCESS_PRIVATE)
* (no reference on an inode or mm)
* 01 : Shared futex (PTHREAD_PROCESS_SHARED)
* mapped on a file (reference on the underlying inode)
* 10 : Shared futex (PTHREAD_PROCESS_SHARED)
* (but private mapping on an mm, and reference taken on it)
*/
#define FUT_OFF_INODE 1 /* We set bit 0 if key has a reference on inode */
#define FUT_OFF_MMSHARED 2 /* We set bit 1 if key has a reference on mm */
union futex_key {
struct {
u64 i_seq;
unsigned long pgoff;
unsigned int offset;
/* unsigned int node; */
} shared;
struct {
union {
struct mm_struct *mm;
u64 __tmp;
};
unsigned long address;
unsigned int offset;
/* unsigned int node; */
} private;
struct {
u64 ptr;
unsigned long word;
unsigned int offset;
unsigned int node; /* NOT hashed! */
} both;
};
#define FUTEX_KEY_INIT (union futex_key) { .both = { .ptr = 0ULL } }
#ifdef CONFIG_FUTEX
enum {
FUTEX_STATE_OK,
FUTEX_STATE_EXITING,
FUTEX_STATE_DEAD,
};
static inline void futex_init_task(struct task_struct *tsk)
{
tsk->robust_list = NULL;
#ifdef CONFIG_COMPAT
tsk->compat_robust_list = NULL;
#endif
INIT_LIST_HEAD(&tsk->pi_state_list);
tsk->pi_state_cache = NULL;
tsk->futex_state = FUTEX_STATE_OK;
mutex_init(&tsk->futex_exit_mutex);
}
void futex_exit_recursive(struct task_struct *tsk);
void futex_exit_release(struct task_struct *tsk);
void futex_exec_release(struct task_struct *tsk);
long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout,
u32 __user *uaddr2, u32 val2, u32 val3);
int futex_hash_prctl(unsigned long arg2, unsigned long arg3, unsigned long arg4);
#ifdef CONFIG_FUTEX_PRIVATE_HASH
int futex_hash_allocate_default(void);
void futex_hash_free(struct mm_struct *mm);
static inline void futex_mm_init(struct mm_struct *mm)
{
RCU_INIT_POINTER(mm->futex_phash, NULL);
mm->futex_phash_new = NULL;
mutex_init(&mm->futex_hash_lock);
}
#else /* !CONFIG_FUTEX_PRIVATE_HASH */
static inline int futex_hash_allocate_default(void) { return 0; }
static inline void futex_hash_free(struct mm_struct *mm) { }
static inline void futex_mm_init(struct mm_struct *mm) { }
#endif /* CONFIG_FUTEX_PRIVATE_HASH */
#else /* !CONFIG_FUTEX */
static inline void futex_init_task(struct task_struct *tsk) { }
static inline void futex_exit_recursive(struct task_struct *tsk) { }
static inline void futex_exit_release(struct task_struct *tsk) { }
static inline void futex_exec_release(struct task_struct *tsk) { }
static inline long do_futex(u32 __user *uaddr, int op, u32 val,
ktime_t *timeout, u32 __user *uaddr2,
u32 val2, u32 val3)
{
return -EINVAL;
}
static inline int futex_hash_prctl(unsigned long arg2, unsigned long arg3, unsigned long arg4)
{
return -EINVAL;
}
static inline int futex_hash_allocate_default(void)
{
return 0;
}
static inline void futex_hash_free(struct mm_struct *mm) { }
static inline void futex_mm_init(struct mm_struct *mm) { }
#endif
#endif