int dead; /* unit/channel has been shut down */
};
-#define PF_TO_X(pf, X) ((X *)((char *)(pf) - offsetof(X, file)))
+#define PF_TO_X(pf, X) container_of(pf, X, file)
#define PF_TO_PPP(pf) PF_TO_X(pf, struct ppp)
#define PF_TO_CHANNEL(pf) PF_TO_X(pf, struct channel)
return err;
}
-static struct file_operations ppp_device_fops = {
+static const struct file_operations ppp_device_fops = {
.owner = THIS_MODULE,
.read = ppp_read,
.write = ppp_write,