new helper: file_inode(file)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/freevxfs/vxfs_lookup.c b/fs/freevxfs/vxfs_lookup.c
index bd447e8..664b07a 100644
--- a/fs/freevxfs/vxfs_lookup.c
+++ b/fs/freevxfs/vxfs_lookup.c
@@ -237,7 +237,7 @@
 static int
 vxfs_readdir(struct file *fp, void *retp, filldir_t filler)
 {
-	struct inode		*ip = fp->f_path.dentry->d_inode;
+	struct inode		*ip = file_inode(fp);
 	struct super_block	*sbp = ip->i_sb;
 	u_long			bsize = sbp->s_blocksize;
 	u_long			page, npages, block, pblocks, nblocks, offset;