Contributors: 10
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Matthew Wilcox |
59 |
33.91% |
5 |
25.00% |
| Chris Zankel |
41 |
23.56% |
2 |
10.00% |
| Linus Torvalds (pre-git) |
27 |
15.52% |
3 |
15.00% |
| David Howells |
19 |
10.92% |
2 |
10.00% |
| Thomas Gleixner |
10 |
5.75% |
3 |
15.00% |
| Peter Zijlstra |
5 |
2.87% |
1 |
5.00% |
| Andi Kleen |
5 |
2.87% |
1 |
5.00% |
| David S. Miller |
4 |
2.30% |
1 |
5.00% |
| Alan Cox |
3 |
1.72% |
1 |
5.00% |
| Adrian Bunk |
1 |
0.57% |
1 |
5.00% |
| Total |
174 |
|
20 |
|
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2008 Intel Corporation
* Author: Matthew Wilcox <willy@linux.intel.com>
*
* Please see kernel/locking/semaphore.c for documentation of these functions
*/
#ifndef __LINUX_SEMAPHORE_H
#define __LINUX_SEMAPHORE_H
#include <linux/list.h>
#include <linux/spinlock.h>
/* Please don't access any members of this structure directly */
struct semaphore {
raw_spinlock_t lock;
unsigned int count;
struct list_head wait_list;
};
#define __SEMAPHORE_INITIALIZER(name, n) \
{ \
.lock = __RAW_SPIN_LOCK_UNLOCKED((name).lock), \
.count = n, \
.wait_list = LIST_HEAD_INIT((name).wait_list), \
}
/*
* Unlike mutexes, binary semaphores do not have an owner, so up() can
* be called in a different thread from the one which called down().
* It is also safe to call down_trylock() and up() from interrupt
* context.
*/
#define DEFINE_SEMAPHORE(_name, _n) \
struct semaphore _name = __SEMAPHORE_INITIALIZER(_name, _n)
static inline void sema_init(struct semaphore *sem, int val)
{
static struct lock_class_key __key;
*sem = (struct semaphore) __SEMAPHORE_INITIALIZER(*sem, val);
lockdep_init_map(&sem->lock.dep_map, "semaphore->lock", &__key, 0);
}
extern void down(struct semaphore *sem);
extern int __must_check down_interruptible(struct semaphore *sem);
extern int __must_check down_killable(struct semaphore *sem);
extern int __must_check down_trylock(struct semaphore *sem);
extern int __must_check down_timeout(struct semaphore *sem, long jiffies);
extern void up(struct semaphore *sem);
#endif /* __LINUX_SEMAPHORE_H */