kernel-ark/net/atm/resources.h
Stanislaw Gruszka aaaaaadbe7 [ATM]: avoid race conditions related to atm_devs list
Use semaphore to protect atm_devs list, as no one need access to it from
interrupt context.  Avoid race conditions between atm_dev_register(),
atm_dev_lookup() and atm_dev_deregister().  Fix double spin_unlock() bug.

Signed-off-by: Stanislaw Gruszka <stf_xl@wp.pl>
Signed-off-by: Chas Williams <chas@cmf.nrl.navy.mil>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-11-29 16:16:21 -08:00

46 lines
894 B
C

/* net/atm/resources.h - ATM-related resources */
/* Written 1995-1998 by Werner Almesberger, EPFL LRC/ICA */
#ifndef NET_ATM_RESOURCES_H
#define NET_ATM_RESOURCES_H
#include <linux/config.h>
#include <linux/atmdev.h>
extern struct list_head atm_devs;
extern struct semaphore atm_dev_mutex;
int atm_dev_ioctl(unsigned int cmd, void __user *arg);
#ifdef CONFIG_PROC_FS
#include <linux/proc_fs.h>
void *atm_dev_seq_start(struct seq_file *seq, loff_t *pos);
void atm_dev_seq_stop(struct seq_file *seq, void *v);
void *atm_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
int atm_proc_dev_register(struct atm_dev *dev);
void atm_proc_dev_deregister(struct atm_dev *dev);
#else
static inline int atm_proc_dev_register(struct atm_dev *dev)
{
return 0;
}
static inline void atm_proc_dev_deregister(struct atm_dev *dev)
{
/* nothing */
}
#endif /* CONFIG_PROC_FS */
#endif