new helper: file_inode(file)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/nfsd/fault_inject.c b/fs/nfsd/fault_inject.c
index e761ee9..497584c 100644
--- a/fs/nfsd/fault_inject.c
+++ b/fs/nfsd/fault_inject.c
@@ -101,7 +101,7 @@
 	loff_t pos = *ppos;
 
 	if (!pos)
-		nfsd_inject_get(file->f_dentry->d_inode->i_private, &val);
+		nfsd_inject_get(file_inode(file)->i_private, &val);
 	size = scnprintf(read_buf, sizeof(read_buf), "%llu\n", val);
 
 	if (pos < 0)
@@ -133,10 +133,10 @@
 
 	size = rpc_pton(net, write_buf, size, (struct sockaddr *)&sa, sizeof(sa));
 	if (size > 0)
-		nfsd_inject_set_client(file->f_dentry->d_inode->i_private, &sa, size);
+		nfsd_inject_set_client(file_inode(file)->i_private, &sa, size);
 	else {
 		val = simple_strtoll(write_buf, NULL, 0);
-		nfsd_inject_set(file->f_dentry->d_inode->i_private, val);
+		nfsd_inject_set(file_inode(file)->i_private, val);
 	}
 	return len; /* on success, claim we got the whole input */
 }
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 7493428..2db7021 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -85,7 +85,7 @@
 
 static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
 {
-	ino_t ino =  file->f_path.dentry->d_inode->i_ino;
+	ino_t ino =  file_inode(file)->i_ino;
 	char *data;
 	ssize_t rv;
 
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index d586117..a94245b 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -979,7 +979,7 @@
  */
 static int wait_for_concurrent_writes(struct file *file)
 {
-	struct inode *inode = file->f_path.dentry->d_inode;
+	struct inode *inode = file_inode(file);
 	static ino_t last_ino;
 	static dev_t last_dev;
 	int err = 0;
@@ -1070,7 +1070,7 @@
 	if (err)
 		return err;
 
-	inode = file->f_path.dentry->d_inode;
+	inode = file_inode(file);
 
 	/* Get readahead parameters */
 	ra = nfsd_get_raparms(inode->i_sb->s_dev, inode->i_ino);
@@ -1957,7 +1957,7 @@
 	offset = *offsetp;
 
 	while (1) {
-		struct inode *dir_inode = file->f_path.dentry->d_inode;
+		struct inode *dir_inode = file_inode(file);
 		unsigned int reclen;
 
 		cdp->err = nfserr_eof; /* will be cleared on successful read */