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aaaaaadbe7
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>
46 lines
894 B
C
46 lines
894 B
C
/* net/atm/resources.h - ATM-related resources */
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/* Written 1995-1998 by Werner Almesberger, EPFL LRC/ICA */
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#ifndef NET_ATM_RESOURCES_H
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#define NET_ATM_RESOURCES_H
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#include <linux/config.h>
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#include <linux/atmdev.h>
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extern struct list_head atm_devs;
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extern struct semaphore atm_dev_mutex;
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int atm_dev_ioctl(unsigned int cmd, void __user *arg);
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#ifdef CONFIG_PROC_FS
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#include <linux/proc_fs.h>
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void *atm_dev_seq_start(struct seq_file *seq, loff_t *pos);
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void atm_dev_seq_stop(struct seq_file *seq, void *v);
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void *atm_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
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int atm_proc_dev_register(struct atm_dev *dev);
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void atm_proc_dev_deregister(struct atm_dev *dev);
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#else
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static inline int atm_proc_dev_register(struct atm_dev *dev)
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{
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return 0;
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}
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static inline void atm_proc_dev_deregister(struct atm_dev *dev)
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{
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/* nothing */
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}
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#endif /* CONFIG_PROC_FS */
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#endif
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