From nobody Mon Apr 6 12:00:19 2026 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (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 EC07239E196 for ; Mon, 30 Mar 2026 07:09:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774854560; cv=none; b=g43eBr7tcmFwUMCeDKgJB23rAsoM1agoCCG1lxOiy+E3I5CYf7X0bGPVfSc+8FZrzcbw+LtmypdZyKsmsSF7XKXipf521WcIv4Mp1phmO5H78rk4vHRa4DSIHwh6IxIi9Tn4CTcogBR8O9JfVk1OJiYzSf3G/lHvLO0SvlOyvVI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774854560; c=relaxed/simple; bh=zaOZZgV/Oh9qZStVRJd7WDKI3LH+qej3/KimnlajPCk=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=AAOyAoByGrm4o3tihRjpLqZjOfvKwc/EeNK9MzNLX0Ay4y9KqvMfsBYYdMJ+O8AVC2S1DJ4L8OIin4hyi5pyj+jQvVc2Hip9aoiHVkd3Pgrw++sg/+spTtt9S7tBCFCCtAVFDskYiGVGPbYWVcpQkCOL/oSW4W49+ntjzNZjuqI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=ETBCNaiT; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=BkC91JwI; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="ETBCNaiT"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="BkC91JwI" From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1774854557; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=VVt4vmqZpClveKwXCPCJckhLv0/U++7IiRFJx443mMo=; b=ETBCNaiTRf8bWJHBmqODJ92dTSQvMF9/1fvfq8uhliPEw2Dr4SXZHk/ou/9fRWNf3VCWkB Gnf8jPWd5BziqG/V3/KPwlzs4USyPt1cRpsBqODLeej4rDn1j91ROBCjlKoxU6Fmf8rbnG 5b82g6VqtbE2kNeWuwjgx6PfEW4PrY7eynmBOLWCclq5ca7fUizgsPx1jiynCgXBzD81El r9+6nn1/2a3sHDQyevxwWU71J9zw15DGSX4NvqVGU/yo1BUZaYxvUEh6ZVykgqwPKLJYQp mu14Dq3StE31Pe4W/IbZljTYVXU6luIwI4i9RRcWFei6xH6DKGNwUrKUdPejuQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1774854557; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=VVt4vmqZpClveKwXCPCJckhLv0/U++7IiRFJx443mMo=; b=BkC91JwI8zixnPgpit8MnTAtslgdFWy8PeW5+qxaMUKTFApT+IUj+xgNaFidombP8M5NNW MUiv5GLR7/X76ACQ== Date: Mon, 30 Mar 2026 09:07:58 +0200 Subject: [PATCH 4/4] timens: Use task_lock guard in timens_get*() 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 Message-Id: <20260330-timens-cleanup-v1-4-936e91c9dd30@linutronix.de> References: <20260330-timens-cleanup-v1-0-936e91c9dd30@linutronix.de> In-Reply-To: <20260330-timens-cleanup-v1-0-936e91c9dd30@linutronix.de> To: Anna-Maria Behnsen , Frederic Weisbecker , Thomas Gleixner Cc: linux-kernel@vger.kernel.org, =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Developer-Signature: v=1; a=ed25519-sha256; t=1774854554; l=1564; i=thomas.weissschuh@linutronix.de; s=20240209; h=from:subject:message-id; bh=zaOZZgV/Oh9qZStVRJd7WDKI3LH+qej3/KimnlajPCk=; b=OdCM4qXeYU6oLuOlJFI2vSLHbUba9GpyOoA3cSA6Pj6AufA/43r9R08+HUHzE+bJ4GR9E2ooa 9Ythnu4evDpBpyHpsMS98ayyn7pkRwfpJAzQVYHm28COI9jD60ZtEML X-Developer-Key: i=thomas.weissschuh@linutronix.de; a=ed25519; pk=pfvxvpFUDJV2h2nY0FidLUml22uGLSjByFbM6aqQQws= Simplify the logic in timens_get*() by converting the task_lock usage to a guard(). Signed-off-by: Thomas Wei=C3=9Fschuh --- kernel/time/namespace.c | 30 ++++++++++++++---------------- 1 file changed, 14 insertions(+), 16 deletions(-) diff --git a/kernel/time/namespace.c b/kernel/time/namespace.c index fbf026e63104..9d2e4870a2c5 100644 --- a/kernel/time/namespace.c +++ b/kernel/time/namespace.c @@ -154,34 +154,32 @@ void free_time_ns(struct time_namespace *ns) =20 static struct ns_common *timens_get(struct task_struct *task) { - struct time_namespace *ns =3D NULL; + struct time_namespace *ns; struct nsproxy *nsproxy; =20 - task_lock(task); + guard(task_lock)(task); nsproxy =3D task->nsproxy; - if (nsproxy) { - ns =3D nsproxy->time_ns; - get_time_ns(ns); - } - task_unlock(task); + if (!nsproxy) + return NULL; =20 - return ns ? &ns->ns : NULL; + ns =3D nsproxy->time_ns; + get_time_ns(ns); + return &ns->ns; } =20 static struct ns_common *timens_for_children_get(struct task_struct *task) { - struct time_namespace *ns =3D NULL; + struct time_namespace *ns; struct nsproxy *nsproxy; =20 - task_lock(task); + guard(task_lock)(task); nsproxy =3D task->nsproxy; - if (nsproxy) { - ns =3D nsproxy->time_ns_for_children; - get_time_ns(ns); - } - task_unlock(task); + if (!nsproxy) + return NULL; =20 - return ns ? &ns->ns : NULL; + ns =3D nsproxy->time_ns_for_children; + get_time_ns(ns); + return &ns->ns; } =20 static void timens_put(struct ns_common *ns) --=20 2.53.0