From nobody Tue Apr 7 04:18:39 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 683643E0247 for ; Mon, 16 Mar 2026 18:40:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773686452; cv=none; b=cN7PmatPovXghgLTRWeHZjFwf8pKy9/ZPnJ1zfGUIeiwP4QyoOQZbTJhKaR7kESHkoN1CmenKDLrUe7wLCilKqEghXahp+xXEt1nUlWL7hS9LUGexYg25AeKV6Usxdjd8s5axW+cNp4y7f3HWk6kIAyZGcdwYDd0HuaWLdriY1I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773686452; c=relaxed/simple; bh=vmqrNQECX9cSDdui4MaBOyr6FGJ7iKqAsoFzXdvgxAc=; h=Message-ID:Date:From:To:Cc:Subject:References:MIME-Version: Content-Type; b=iS9TGis/wXc4uCjj/vlkiLwUPeRZw6TbFoHc2MIJkxuzro+LRYPC/wxp2XLpAsJtkqx9lm8wooHhMTT8sBZgu0FrDNJcmKLpYCJNG5flKanqXe8BR93BgQsJCy5xh4Z2Q8m9kDWngzo/gkPz4CDxS73DBJ8NyiI5lzjaIpDS4r0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=AUtolVNh; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="AUtolVNh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E4E04C2BCB2; Mon, 16 Mar 2026 18:40:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773686451; bh=vmqrNQECX9cSDdui4MaBOyr6FGJ7iKqAsoFzXdvgxAc=; h=Date:From:To:Cc:Subject:References:From; b=AUtolVNhuOTnqVWvnCvV2VZhjhRongp7dSvWoNwcIXFhRgr19/rOTTXwsjBxCWuXo jxBDj3UMkhEm3Rb3bM62Tc/odjnTw8fCdJl97WIgGAfA/r1KUVxIbnsYuC0HB/ORmI s0mUQTUtgx3ZTftmipLkUZSZo5/tntb0UmoLpote9VgjOKchPZhGbQCishJbNjvZGO H1Lqp9clY/5HsQ2JmzrqBWCeEE8GcvUDzZmQwLP6KRMkYqyjGZDN6Id1J9PGN5jFft Wk+LAf4WKtG+WLaia0VnQOo2AZndFlBqmHZHm07P5hl1/EyaTcre4jVXOjWApaHlq5 gO7VJfBodqRzA== Received: from rostedt by gandalf with local (Exim 4.99.1) (envelope-from ) id 1w2CsO-0000000852x-0qF1; Mon, 16 Mar 2026 14:41:16 -0400 Message-ID: <20260316184116.072994651@kernel.org> User-Agent: quilt/0.69 Date: Mon, 16 Mar 2026 14:40:36 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: "John Warthog9 Hawley" , =?UTF-8?q?Ricardo=20B.=20Marli=C3=A8re?= , John Hawley , Andrea Righi , Marcos Paulo de Souza , Matthieu Baerts , Fernando Fernandez Mancera , Pedro Falcato Subject: [for-next][PATCH 3/9] ktest: Treat undefined self-reference as empty References: <20260316184033.927944169@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable From: =3D?UTF-8?q?Ricardo=3D20B=3D2E=3D20Marli=3DC3=3DA8re?=3D Config variables are expanded when they are assigned. A first-time append such as: VAR :=3D ${VAR} foo leaves the literal ${VAR} in the stored value because VAR has not been defined yet. Later expansions then carry the self-reference forward instead of behaving like an empty prefix. Drop an unescaped self-reference when the variable has no current value, and trim the outer whitespace left behind. Keep escaped \${VAR} references unchanged so literal text still works. Cc: John Hawley Cc: Andrea Righi Cc: Marcos Paulo de Souza Cc: Matthieu Baerts Cc: Fernando Fernandez Mancera Cc: Pedro Falcato Link: https://patch.msgid.link/20260307-ktest-fixes-v1-3-565d412f4925@suse.= com Signed-off-by: Ricardo B. Marli=C3=A8re Signed-off-by: Steven Rostedt --- tools/testing/ktest/ktest.pl | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/tools/testing/ktest/ktest.pl b/tools/testing/ktest/ktest.pl index b7a1c8c617e0..b8fcdabffffe 100755 --- a/tools/testing/ktest/ktest.pl +++ b/tools/testing/ktest/ktest.pl @@ -910,6 +910,14 @@ sub set_variable { if (defined($command_tmp_vars{$lvalue})) { return; } + + # If a variable is undefined, treat an unescaped self-reference as emp= ty. + if (!defined($variable{$lvalue})) { + $rvalue =3D~ s/(?