VFS: discard err2 in filename_create()

Since 204a575 "VFS: add common error checks to lookup_one_qstr_excl()"
filename_create() does not need to stash the error value from mnt_want_write()
into a separate variable - the logic that used to clobber 'error' after the
call of mnt_want_write() has migrated into lookup_one_qstr_excl().

So there is no need for two different err variables.
This patch discards "err2" and uses "error' throughout.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: NeilBrown <neil@brown.name>
Signed-off-by: Christian Brauner <brauner@kernel.org>

Author: neilbrown

fs/namei.c

@@ -4169,7 +4169,6 @@ static struct dentry *filename_create(int dfd, struct filename *name,
 	unsigned int reval_flag = lookup_flags & LOOKUP_REVAL;
 	unsigned int create_flags = LOOKUP_CREATE | LOOKUP_EXCL;
 	int type;
-	int err2;
 	int error;
 
 	error = filename_parentat(dfd, name, reval_flag, path, &last, &type);
@@ -4184,7 +4183,7 @@ static struct dentry *filename_create(int dfd, struct filename *name,
 		goto out;
 
 	/* don't fail immediately if it's r/o, at least try to report other errors */
-	err2 = mnt_want_write(path->mnt);
+	error = mnt_want_write(path->mnt);
 	/*
 	 * Do the final lookup.  Suppress 'create' if there is a trailing
 	 * '/', and a directory wasn't requested.
@@ -4197,17 +4196,16 @@ static struct dentry *filename_create(int dfd, struct filename *name,
 	if (IS_ERR(dentry))
 		goto unlock;
 
-	if (unlikely(err2)) {
-		error = err2;
+	if (unlikely(error))
 		goto fail;
-	}
+
 	return dentry;
 fail:
 	dput(dentry);
 	dentry = ERR_PTR(error);
 unlock:
 	inode_unlock(path->dentry->d_inode);
-	if (!err2)
+	if (!error)
 		mnt_drop_write(path->mnt);
 out:
 	path_put(path);