Contributors: 14
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Ingo Molnar |
105 |
54.69% |
1 |
5.26% |
| Linus Torvalds |
19 |
9.90% |
1 |
5.26% |
| Thomas Gleixner |
18 |
9.38% |
3 |
15.79% |
| Andi Kleen |
13 |
6.77% |
2 |
10.53% |
| Linus Torvalds (pre-git) |
8 |
4.17% |
2 |
10.53% |
| Hirokazu Takata |
7 |
3.65% |
2 |
10.53% |
| Nicholas Piggin |
6 |
3.12% |
1 |
5.26% |
| Stephen Rothwell |
4 |
2.08% |
1 |
5.26% |
| Rolf Eike Beer |
3 |
1.56% |
1 |
5.26% |
| Andrew Morton |
3 |
1.56% |
1 |
5.26% |
| Robert Love |
2 |
1.04% |
1 |
5.26% |
| Rick Lindsley |
2 |
1.04% |
1 |
5.26% |
| Viresh Kumar |
1 |
0.52% |
1 |
5.26% |
| Sebastian Andrzej Siewior |
1 |
0.52% |
1 |
5.26% |
| Total |
192 |
|
19 |
|
#ifndef __LINUX_SPINLOCK_UP_H
#define __LINUX_SPINLOCK_UP_H
#ifndef __LINUX_INSIDE_SPINLOCK_H
# error "please don't include this file directly"
#endif
#include <asm/processor.h> /* for cpu_relax() */
#include <asm/barrier.h>
/*
* include/linux/spinlock_up.h - UP-debug version of spinlocks.
*
* portions Copyright 2005, Red Hat, Inc., Ingo Molnar
* Released under the General Public License (GPL).
*
* In the debug case, 1 means unlocked, 0 means locked. (the values
* are inverted, to catch initialization bugs)
*
* No atomicity anywhere, we are on UP. However, we still need
* the compiler barriers, because we do not want the compiler to
* move potentially faulting instructions (notably user accesses)
* into the locked sequence, resulting in non-atomic execution.
*/
#ifdef CONFIG_DEBUG_SPINLOCK
#define arch_spin_is_locked(x) ((x)->slock == 0)
static inline void arch_spin_lock(arch_spinlock_t *lock)
{
lock->slock = 0;
barrier();
}
static inline int arch_spin_trylock(arch_spinlock_t *lock)
{
char oldval = lock->slock;
lock->slock = 0;
barrier();
return oldval > 0;
}
static inline void arch_spin_unlock(arch_spinlock_t *lock)
{
barrier();
lock->slock = 1;
}
/*
* Read-write spinlocks. No debug version.
*/
#define arch_read_lock(lock) do { barrier(); (void)(lock); } while (0)
#define arch_write_lock(lock) do { barrier(); (void)(lock); } while (0)
#define arch_read_trylock(lock) ({ barrier(); (void)(lock); 1; })
#define arch_write_trylock(lock) ({ barrier(); (void)(lock); 1; })
#define arch_read_unlock(lock) do { barrier(); (void)(lock); } while (0)
#define arch_write_unlock(lock) do { barrier(); (void)(lock); } while (0)
#else /* DEBUG_SPINLOCK */
#define arch_spin_is_locked(lock) ((void)(lock), 0)
/* for sched/core.c and kernel_lock.c: */
# define arch_spin_lock(lock) do { barrier(); (void)(lock); } while (0)
# define arch_spin_unlock(lock) do { barrier(); (void)(lock); } while (0)
# define arch_spin_trylock(lock) ({ barrier(); (void)(lock); 1; })
#endif /* DEBUG_SPINLOCK */
#define arch_spin_is_contended(lock) (((void)(lock), 0))
#endif /* __LINUX_SPINLOCK_UP_H */