From nobody Mon May 11 02:55:31 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id ECC5EC433F5 for ; Sun, 17 Apr 2022 12:56:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234099AbiDQM7E (ORCPT ); Sun, 17 Apr 2022 08:59:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43186 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232144AbiDQM7B (ORCPT ); Sun, 17 Apr 2022 08:59:01 -0400 Received: from m12-14.163.com (m12-14.163.com [220.181.12.14]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id BC9A024959 for ; Sun, 17 Apr 2022 05:56:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:Subject:Date:Message-Id:MIME-Version; bh=2CJdp WYp1Jwg5xWMnBstOcpyeej46BkVdxvxaprz1DA=; b=PPhC6zU1c4GjGLPH+RA32 WEW+loKPbMM04b3BO/yk/IJUHlQycc24DQtM7sCHG+03JvhEXCeuxau9VvdieKd8 O0LuzjUP9F5b4yY9yn1NMhzTqLeCu8Io2LCPzirA+U9V+TPCIF1EkIJUrjYSEy1q U1KF71c1d9WbXbaDqbR00A= Received: from localhost (unknown [223.74.153.137]) by smtp10 (Coremail) with SMTP id DsCowAC3B2NoDlxiFQrHBg--.13975S2; Sun, 17 Apr 2022 20:56:10 +0800 (CST) From: Junwen Wu To: rafael@kernel.org, daniel.lezcano@linaro.org, amitk@kernel.org, rui.zhang@intel.com Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Junwen Wu Subject: [PATCH v1] thermal/core: change mm alloc method to avoid kernel warning Date: Sun, 17 Apr 2022 12:56:01 +0000 Message-Id: <20220417125601.18535-1-wudaemon@163.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: DsCowAC3B2NoDlxiFQrHBg--.13975S2 X-Coremail-Antispam: 1Uf129KBjvJXoW7Aw4rKr45CFyfZrW5Xr4xJFb_yoW8Ww4Dpa 15W3W5AFZ8XF4UGayUAr48WrZ0y3Z8ta47uFyIkas8ua13JrW3JFyDAry7XrWkGrW8CFW3 AF1qqr1F9rs8ArJanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x0pioUDdUUUUU= X-Originating-IP: [223.74.153.137] X-CM-SenderInfo: 5zxgtvxprqqiywtou0bp/1tbiLArlbVspdouOVAAAs7 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Very high cooling device max state value makes cooling device stats buffer allocation fails,like below.Using kzvalloc instead of kzalloc can avoid this issue. [ 7.392644]WARNING: CPU: 7 PID: 1747 at mm/page_alloc.c:5090 __alloc_pag= es_nodemask+0x1c0/0x3dc [ 7.392989]Call trace: [ 7.392992]__alloc_pages_nodemask+0x1c0/0x3dc [ 7.392995]kmalloc_order+0x54/0x358 [ 7.392997]kmalloc_order_trace+0x34/0x1bc [ 7.393001]__kmalloc+0x5cc/0x9c8 [ 7.393005]thermal_cooling_device_setup_sysfs+0x90/0x218 [ 7.393008]__thermal_cooling_device_register+0x160/0x7a4 [ 7.393012]thermal_of_cooling_device_register+0x14/0x24 [ 7.393140]backlight_cdev_register+0x88/0x100 [msm_drm] Signed-off-by: Junwen Wu --- drivers/thermal/thermal_sysfs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/thermal/thermal_sysfs.c b/drivers/thermal/thermal_sysf= s.c index f154bada2906..361e0d0c241b 100644 --- a/drivers/thermal/thermal_sysfs.c +++ b/drivers/thermal/thermal_sysfs.c @@ -829,7 +829,7 @@ static void cooling_device_stats_setup(struct thermal_c= ooling_device *cdev) var +=3D sizeof(*stats->time_in_state) * states; var +=3D sizeof(*stats->trans_table) * states * states; =20 - stats =3D kzalloc(var, GFP_KERNEL); + stats =3D kvzalloc(var, GFP_KERNEL); if (!stats) return; =20 @@ -848,7 +848,7 @@ static void cooling_device_stats_setup(struct thermal_c= ooling_device *cdev) =20 static void cooling_device_stats_destroy(struct thermal_cooling_device *cd= ev) { - kfree(cdev->stats); + kvfree(cdev->stats); cdev->stats =3D NULL; } =20 --=20 2.25.1