void scullc_cleanup(void)
{
int i;
#ifdef SCULLC_USE_PROC
remove_proc_entry("scullcmem", NULL);
#endif
for (i = 0; i < scullc_devs; i++) {
cdev_del(&scullc_devices[i].cdev);
scullc_trim(scullc_devices + i);
}
kfree(scullc_devices);
if (scullc_cache)
kmem_cache_destroy(scullc_cache);
unregister_chrdev_region(MKDEV (scullc_major, 0), scullc_devs);
}
int scullc_open (struct inode *inode, struct file *filp)
{
struct scullc_dev *dev; /* device information */
/* Find the device */
dev = container_of(inode->i_cdev, struct scullc_dev, cdev);
/* now trim to 0 the length of the device if open was write-only */
if ( (filp->f_flags & O_ACCMODE) == O_WRONLY) {
if (down_interruptible (&dev->sem))
return -ERESTARTSYS;
scullc_trim(dev); /* ignore errors */
up (&dev->sem);
}
/* and use filp->private_data to point to the device data */
filp->private_data = dev;
return 0; /* success */
}
