new helper: file_inode(file)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

drivers/isdn/i4l/isdn_common.c

@@ -1058,7 +1058,7 @@ isdn_info_update(void)
 static ssize_t
 isdn_read(struct file *file, char __user *buf, size_t count, loff_t *off)
 {
-	uint minor = iminor(file->f_path.dentry->d_inode);
+	uint minor = iminor(file_inode(file));
 	int len = 0;
 	int drvidx;
 	int chidx;
@@ -1165,7 +1165,7 @@ out:
 static ssize_t
 isdn_write(struct file *file, const char __user *buf, size_t count, loff_t *off)
 {
-	uint minor = iminor(file->f_path.dentry->d_inode);
+	uint minor = iminor(file_inode(file));
 	int drvidx;
 	int chidx;
 	int retval;
@@ -1228,7 +1228,7 @@ static unsigned int
 isdn_poll(struct file *file, poll_table *wait)
 {
 	unsigned int mask = 0;
-	unsigned int minor = iminor(file->f_path.dentry->d_inode);
+	unsigned int minor = iminor(file_inode(file));
 	int drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
 
 	mutex_lock(&isdn_mutex);
@@ -1269,7 +1269,7 @@ out:
 static int
 isdn_ioctl(struct file *file, uint cmd, ulong arg)
 {
-	uint minor = iminor(file->f_path.dentry->d_inode);
+	uint minor = iminor(file_inode(file));
 	isdn_ctrl c;
 	int drvidx;
 	int ret;

drivers/isdn/i4l/isdn_ppp.c

@@ -668,7 +668,7 @@ isdn_ppp_poll(struct file *file, poll_table *wait)
 
 	if (is->debug & 0x2)
 		printk(KERN_DEBUG "isdn_ppp_poll: minor: %d\n",
-		       iminor(file->f_path.dentry->d_inode));
+		       iminor(file_inode(file)));
 
 	/* just registers wait_queue hook. This doesn't really wait. */
 	poll_wait(file, &is->wq, wait);