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Tue, 21 Oct 2025 22:31:39 +0800 From: tanze To: mchehab@kernel.org, mingo@kernel.org, hverkuil@kernel.org, tskd08@gmail.com Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, tanze Subject: [PATCH 1/3] media: dvb-core: Optimize the code using vmalloc_array Date: Tue, 21 Oct 2025 22:31:20 +0800 Message-Id: <20251021143122.268730-2-tanze@kylinos.cn> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20251021143122.268730-1-tanze@kylinos.cn> References: <20251021143122.268730-1-tanze@kylinos.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Change array_size() to vmalloc_array(), Due to vmalloc_array() is optimized= better, uses fewer instructions, and handles overflow more concisely Signed-off-by: tanze --- drivers/media/dvb-core/dmxdev.c | 4 ++-- drivers/media/dvb-core/dvb_demux.c | 9 +++++---- 2 files changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/media/dvb-core/dmxdev.c b/drivers/media/dvb-core/dmxde= v.c index 151177e5a06d..8c6f5aafda1d 100644 --- a/drivers/media/dvb-core/dmxdev.c +++ b/drivers/media/dvb-core/dmxdev.c @@ -1414,8 +1414,8 @@ int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb= _adapter *dvb_adapter) if (dmxdev->demux->open(dmxdev->demux) < 0) return -EUSERS; =20 - dmxdev->filter =3D vmalloc(array_size(sizeof(struct dmxdev_filter), - dmxdev->filternum)); + dmxdev->filter =3D vmalloc_array(dmxdev->filternum, + sizeof(struct dmxdev_filter)); if (!dmxdev->filter) return -ENOMEM; =20 diff --git a/drivers/media/dvb-core/dvb_demux.c b/drivers/media/dvb-core/dv= b_demux.c index 7c4d86bfdd6c..9d5600501cf8 100644 --- a/drivers/media/dvb-core/dvb_demux.c +++ b/drivers/media/dvb-core/dvb_demux.c @@ -1238,14 +1238,15 @@ int dvb_dmx_init(struct dvb_demux *dvbdemux) =20 dvbdemux->cnt_storage =3D NULL; dvbdemux->users =3D 0; - dvbdemux->filter =3D vmalloc(array_size(sizeof(struct dvb_demux_filter), - dvbdemux->filternum)); + dvbdemux->filter =3D vmalloc_array(dvbdemux->filternum, + sizeof(struct dvb_demux_filter)); =20 if (!dvbdemux->filter) return -ENOMEM; =20 - dvbdemux->feed =3D vmalloc(array_size(sizeof(struct dvb_demux_feed), - dvbdemux->feednum)); + dvbdemux->feed =3D vmalloc_array(dvbdemux->feednum, + sizeof(struct dvb_demux_feed)); + if (!dvbdemux->feed) { vfree(dvbdemux->filter); dvbdemux->filter =3D NULL; --=20 2.25.1 From nobody Sun Feb 8 23:27:01 2026 Received: from mailgw.kylinos.cn (mailgw.kylinos.cn [124.126.103.232]) (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 C81CA1A0BF3; Tue, 21 Oct 2025 14:31:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=124.126.103.232 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761057108; cv=none; b=SZPqQ0TmAc+YlO0IdNMLgfklVdxFKBqvX0bhHgXahw6i3a96rAWHQHhjbw4Lwj1uaMz1ISdKIeecW0hLLaZ7r5p+Y+QZSRCLuUWk6TX0fsjnMqgQ+TIptprYLD2mFUJA8P5GTxVDDzkgDdeqqb29fUtFoyYxvOesxCzu+k48bzU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761057108; c=relaxed/simple; bh=lLfYKNIlPfSiiRD/Iu7e56zGc7knM/BGpJEE4iSCbxk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=SS+5IWFj28YzUVGytJZUfIXvcdJPZfEvtZXSU0e3+76MECjIqwkTiJ5JXCZE7n1fQsmzve57fnb8O7mFEbkQZOZwOGIsKjJt/59HLiqXBx/qcSr0hRSH+123ihiDuPYFp3u01jxaDZN0YNpbWoM1P2i7al3N7R1esca4jrFzPEE= ARC-Authentication-Results: i=1; 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Tue, 21 Oct 2025 22:31:41 +0800 From: tanze To: mchehab@kernel.org, mingo@kernel.org, hverkuil@kernel.org, tskd08@gmail.com Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, tanze Subject: [PATCH 2/3] media: vivid: Optimize the code using vmalloc_array Date: Tue, 21 Oct 2025 22:31:21 +0800 Message-Id: <20251021143122.268730-3-tanze@kylinos.cn> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20251021143122.268730-1-tanze@kylinos.cn> References: <20251021143122.268730-1-tanze@kylinos.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Change array_size() to vmalloc_array(), Due to vmalloc_array() is optimized= better, uses fewer instructions, and handles overflow more concisely Signed-off-by: tanze --- drivers/media/test-drivers/vivid/vivid-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/test-drivers/vivid/vivid-core.c b/drivers/media/= test-drivers/vivid/vivid-core.c index 86506be36acb..d9dac574af8b 100644 --- a/drivers/media/test-drivers/vivid/vivid-core.c +++ b/drivers/media/test-drivers/vivid/vivid-core.c @@ -1864,7 +1864,7 @@ static int vivid_create_instance(struct platform_devi= ce *pdev, int inst) goto free_dev; =20 /* load the edid */ - dev->edid =3D vmalloc(array_size(256, 128)); + dev->edid =3D vmalloc_array(128, 256); if (!dev->edid) goto free_dev; =20 --=20 2.25.1 From nobody Sun Feb 8 23:27:01 2026 Received: from mailgw.kylinos.cn (mailgw.kylinos.cn [124.126.103.232]) (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 D47EE33B964; Tue, 21 Oct 2025 14:31:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=124.126.103.232 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761057112; cv=none; b=d7AXrDp6vF1hrX7Wro3hMr2kt5jK6S0n2L35muFJXim68uiV/Z57oLsFAbS6biPSCPux8dRzA4fec+LLpzsnOC+AHD/oaQl0AP9asyEx4pQtFLJEqaVlzIpCyj8NOwxLcjYc1EaHwkpv4MdGzjcg3WQLIR9Zovn7Yorec1aTk4Q= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761057112; c=relaxed/simple; bh=CUCX075AbhBvE1nIpdOiANlWY53e4C8r9FbOkbIkqzE=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; 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Tue, 21 Oct 2025 22:31:43 +0800 From: tanze To: mchehab@kernel.org, mingo@kernel.org, hverkuil@kernel.org, tskd08@gmail.com Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, tanze Subject: [PATCH 3/3] media: pt1: Optimize the code using vmalloc_array Date: Tue, 21 Oct 2025 22:31:22 +0800 Message-Id: <20251021143122.268730-4-tanze@kylinos.cn> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20251021143122.268730-1-tanze@kylinos.cn> References: <20251021143122.268730-1-tanze@kylinos.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Change array_size() to vmalloc_array(), Due to vmalloc_array() is optimized= better, uses fewer instructions, and handles overflow more concisely Signed-off-by: tanze --- drivers/media/pci/pt1/pt1.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/pci/pt1/pt1.c b/drivers/media/pci/pt1/pt1.c index 121a4a92ea10..963fa5e13d33 100644 --- a/drivers/media/pci/pt1/pt1.c +++ b/drivers/media/pci/pt1/pt1.c @@ -639,7 +639,7 @@ static int pt1_init_tables(struct pt1 *pt1) if (!pt1_nr_tables) return 0; =20 - tables =3D vmalloc(array_size(pt1_nr_tables, sizeof(struct pt1_table))); + tables =3D vmalloc_array(sizeof(struct pt1_table), pt1_nr_tables); if (tables =3D=3D NULL) return -ENOMEM; =20 --=20 2.25.1