locks: Use more file_inode and fix a comment

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
diff --git a/fs/locks.c b/fs/locks.c
index 316e474..c74c9df 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -1718,8 +1718,7 @@
 {
 	int error = -EAGAIN;
 	struct file_lock *fl, *victim = NULL;
-	struct dentry *dentry = filp->f_path.dentry;
-	struct inode *inode = dentry->d_inode;
+	struct inode *inode = file_inode(filp);
 	struct file_lock_context *ctx;
 	LIST_HEAD(dispose);
 
@@ -1759,8 +1758,7 @@
 int generic_setlease(struct file *filp, long arg, struct file_lock **flp,
 			void **priv)
 {
-	struct dentry *dentry = filp->f_path.dentry;
-	struct inode *inode = dentry->d_inode;
+	struct inode *inode = file_inode(filp);
 	int error;
 
 	if ((!uid_eq(current_fsuid(), inode->i_uid)) && !capable(CAP_LEASE))
@@ -2115,7 +2113,7 @@
 	return error;
 }
 
-/* Ensure that fl->fl_filp has compatible f_mode for F_SETLK calls */
+/* Ensure that fl->fl_file has compatible f_mode for F_SETLK calls */
 static int
 check_fmode_for_setlk(struct file_lock *fl)
 {