mISDN: misc timerdev fixes

- Remove noop VFS stubs. The VFS does that on a NULL pointer anyways.
- Fix timer handler prototype to be correct
- Comment ugly SMP race I didn't fix.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 16 deletions

diff --git a/drivers/isdn/mISDN/timerdev.c b/drivers/isdn/mISDN/timerdev.c
index b5fabc7019d8..e7462924b505 100644
--- a/drivers/isdn/mISDN/timerdev.c
+++ b/drivers/isdn/mISDN/timerdev.c
@@ -124,18 +124,6 @@ mISDN_read(struct file *filep, char *buf, size_t count, loff_t *off)
         return ret;
 }
 
-static loff_t
-mISDN_llseek(struct file *filep, loff_t offset, int orig)
-{
-        return -ESPIPE;
-}
-
-static ssize_t
-mISDN_write(struct file *filep, const char *buf, size_t count, loff_t *off)
-{
-        return -EOPNOTSUPP;
-}
-
 static unsigned int
 mISDN_poll(struct file *filep, poll_table *wait)
 {
@@ -157,8 +145,9 @@ mISDN_poll(struct file *filep, poll_table *wait)
 }
 
 static void
-dev_expire_timer(struct mISDNtimer *timer)
+dev_expire_timer(unsigned long data)
 {
+        struct mISDNtimer *timer = (void *)data;
         u_long                  flags;
 
         spin_lock_irqsave(&timer->dev->lock, flags);
@@ -191,7 +180,7 @@ misdn_add_timer(struct mISDNtimerdev *dev, int timeout)
                 spin_unlock_irqrestore(&dev->lock, flags);
                 timer->dev = dev;
                 timer->tl.data = (long)timer;
-                timer->tl.function = (void *) dev_expire_timer;
+                timer->tl.function = dev_expire_timer;
                 init_timer(&timer->tl);
                 timer->tl.expires = jiffies + ((HZ * (u_long)timeout) / 1000);
                 add_timer(&timer->tl);
@@ -211,6 +200,9 @@ misdn_del_timer(struct mISDNtimerdev *dev, int id)
         list_for_each_entry(timer, &dev->pending, list) {
                 if (timer->id == id) {
                         list_del_init(&timer->list);
+                        /* RED-PEN AK: race -- timer can be still running on
+                         * other CPU. Needs reference count I think
+                         */
                         del_timer(&timer->tl);
                         ret = timer->id;
                         kfree(timer);
@@ -268,9 +260,7 @@ mISDN_ioctl(struct inode *inode, struct file *filep, unsigned int cmd,
 }
 
 static struct file_operations mISDN_fops = {
-        .llseek         = mISDN_llseek,
         .read           = mISDN_read,
-        .write          = mISDN_write,
         .poll           = mISDN_poll,
         .ioctl          = mISDN_ioctl,
         .open           = mISDN_open,