new helper: file_inode(file)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/char/dsp56k.c b/drivers/char/dsp56k.c
index 052797b..01a5ca7 100644
--- a/drivers/char/dsp56k.c
+++ b/drivers/char/dsp56k.c
@@ -181,7 +181,7 @@
 static ssize_t dsp56k_read(struct file *file, char __user *buf, size_t count,
 			   loff_t *ppos)
 {
-	struct inode *inode = file->f_path.dentry->d_inode;
+	struct inode *inode = file_inode(file);
 	int dev = iminor(inode) & 0x0f;
 
 	switch(dev)
@@ -244,7 +244,7 @@
 static ssize_t dsp56k_write(struct file *file, const char __user *buf, size_t count,
 			    loff_t *ppos)
 {
-	struct inode *inode = file->f_path.dentry->d_inode;
+	struct inode *inode = file_inode(file);
 	int dev = iminor(inode) & 0x0f;
 
 	switch(dev)
@@ -306,7 +306,7 @@
 static long dsp56k_ioctl(struct file *file, unsigned int cmd,
 			 unsigned long arg)
 {
-	int dev = iminor(file->f_path.dentry->d_inode) & 0x0f;
+	int dev = iminor(file_inode(file)) & 0x0f;
 	void __user *argp = (void __user *)arg;
 
 	switch(dev)
@@ -408,7 +408,7 @@
 #if 0
 static unsigned int dsp56k_poll(struct file *file, poll_table *wait)
 {
-	int dev = iminor(file->f_path.dentry->d_inode) & 0x0f;
+	int dev = iminor(file_inode(file)) & 0x0f;
 
 	switch(dev)
 	{