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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Jul 2025 07:51:29.2667 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b4f1bbf4-4fbc-4a7c-0fb9-08ddbdf43f9e X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DS2PEPF0000343C.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA4PR12MB9810 Content-Type: text/plain; charset="utf-8" This new api is used for hibernation to move GTT BOs to shmem after VRAM eviction. shmem will be flushed to swap disk later to reduce the system memory usage for hibernation. Signed-off-by: Samuel Zhang --- drivers/gpu/drm/ttm/ttm_device.c | 22 ++++++++++++++++++++++ include/drm/ttm/ttm_device.h | 1 + 2 files changed, 23 insertions(+) diff --git a/drivers/gpu/drm/ttm/ttm_device.c b/drivers/gpu/drm/ttm/ttm_dev= ice.c index 02e797fd1891..f14437ea0cce 100644 --- a/drivers/gpu/drm/ttm/ttm_device.c +++ b/drivers/gpu/drm/ttm/ttm_device.c @@ -123,6 +123,28 @@ static int ttm_global_init(void) return ret; } =20 +/** + * move GTT BOs to shmem for hibernation. + * + * returns 0 on success, negative on failure. + */ +int ttm_device_prepare_hibernation(struct ttm_device *bdev) +{ + struct ttm_operation_ctx ctx =3D { + .interruptible =3D false, + .no_wait_gpu =3D false, + .force_alloc =3D true + }; + int ret; + + guard(mutex)(&ttm_global_mutex); + do { + ret =3D ttm_device_swapout(bdev, &ctx, GFP_KERNEL); + } while (ret > 0); + return ret; +} +EXPORT_SYMBOL(ttm_device_prepare_hibernation); + /* * A buffer object shrink method that tries to swap out the first * buffer object on the global::swap_lru list. diff --git a/include/drm/ttm/ttm_device.h b/include/drm/ttm/ttm_device.h index 39b8636b1845..592b5f802859 100644 --- a/include/drm/ttm/ttm_device.h +++ b/include/drm/ttm/ttm_device.h @@ -272,6 +272,7 @@ struct ttm_device { int ttm_global_swapout(struct ttm_operation_ctx *ctx, gfp_t gfp_flags); 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Tue, 8 Jul 2025 02:51:28 -0500 From: Samuel Zhang To: , , , , , , , , , , , , , , CC: , , , , , , , , , , "Samuel Zhang" Subject: [PATCH v3 2/5] drm/amdgpu: move GTT to shmem after eviction for hibernation Date: Tue, 8 Jul 2025 15:42:45 +0800 Message-ID: <20250708074248.1674924-3-guoqing.zhang@amd.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20250708074248.1674924-1-guoqing.zhang@amd.com> References: <20250708074248.1674924-1-guoqing.zhang@amd.com> 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 Received-SPF: None (SATLEXMB04.amd.com: guoqing.zhang@amd.com does not designate permitted sender hosts) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS2PEPF00003439:EE_|IA0PR12MB8695:EE_ X-MS-Office365-Filtering-Correlation-Id: 7fbb8f95-42d7-4c84-f71c-08ddbdf44291 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|36860700013|1800799024|7416014|376014|921020; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Jul 2025 07:51:34.2216 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7fbb8f95-42d7-4c84-f71c-08ddbdf44291 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DS2PEPF00003439.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB8695 Content-Type: text/plain; charset="utf-8" When hibernate with data center dGPUs, huge number of VRAM BOs evicted to GTT and takes too much system memory. This will cause hibernation fail due to insufficient memory for creating the hibernation image. Move GTT BOs to shmem in KMD, then shmem to swap disk in kernel hibernation code to make room for hibernation image. Signed-off-by: Samuel Zhang Reviewed-by: Christian K=C3=B6nig --- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/a= md/amdgpu/amdgpu_device.c index 684d66bc0b5f..2f977fece08f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -5021,8 +5021,16 @@ static int amdgpu_device_evict_resources(struct amdg= pu_device *adev) return 0; =20 ret =3D amdgpu_ttm_evict_resources(adev, TTM_PL_VRAM); - if (ret) + if (ret) { dev_warn(adev->dev, "evicting device resources failed\n"); + return ret; + } + + if (adev->in_s4) { + ret =3D ttm_device_prepare_hibernation(&adev->mman.bdev); + if (ret) + dev_err(adev->dev, "prepare hibernation failed, %d\n", ret); + } return ret; } =20 --=20 2.43.5 From nobody Tue Oct 7 17:44:44 2025 Received: from NAM04-DM6-obe.outbound.protection.outlook.com (mail-dm6nam04on2052.outbound.protection.outlook.com [40.107.102.52]) (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 43F2429826D; 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X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?3ALh1AijuT5QseweA1hqO+g534VHkle9sRD9TSfgmNgAcW8gQvHvn2gk/FUS?= =?us-ascii?Q?B8BX9bMetiqHHYeTbZC44Joc/3eUzlirNZshqNnqh3Ea94Ag1PSouFJRM/SY?= =?us-ascii?Q?YgUJg31fHTD9CG3kJKxsSIqe+Gn0EPv5eQ/JQfvtwQHBBOI940ZyMWE9RdJf?= =?us-ascii?Q?trOIv1S5nHdoiomIBjXhNFbODCJenZHFBAFViQBzr+o4c1T57YPNU64KJAwd?= =?us-ascii?Q?S6CKX6c5AHENWuQ25GsKItKAdBCrg/upA4CrQIGVBmjxNTiaAB0cicQA7UeI?= =?us-ascii?Q?4+XM2Q26ltnZ/7gG6MU/UN2NVlTEL+kz8aTvHNaFvqUBY0l+MNLOf2bsmO8P?= =?us-ascii?Q?IySBOtDrv2VQsOcEIUKxEl+PZW1FZh5Ca2/Zr/znK/xzDb4EVVtKJshNWXDY?= =?us-ascii?Q?CxTFtBpYI0lRfmzolFjTWEgHPJG9VSw5KZAC+B3Elym+ag94pQgZNSTYnBoE?= =?us-ascii?Q?IiqkexT8JE8nVjteiBKIx2kL1V8P9HtaIxDup/45MefWXppQMuppmK+EXvpY?= =?us-ascii?Q?yj/EjHuhx2YdqjoJwNWAOX52jkpB6HyuTXDyS4C3+oVvJWOm3PrBF4HZETHy?= =?us-ascii?Q?vTJtl9o6YiVDDsECLQKlEch88cFe1n4UFXEJlzXzycPoA820GZNCbeHlRA4j?= =?us-ascii?Q?dNwsUorWmRsekxvg341kQm7D/nHUKklmCxHNIS2A0tg3Vp3LOKUK2NKNsIdu?= =?us-ascii?Q?t5S0nirt5ld47lQBZUILIr54ncnYwKzptclcTbIDBQ9Hp+3y7Mcc9GY4BCVS?= =?us-ascii?Q?uC3C7mW2oqeZSnpeXxAQ6DFx6OluC1N5xLJHzDBXooPGgFiKBl0h6XtsuXC6?= =?us-ascii?Q?W7jHRqPWbYACeqpPWl8SD5RputYBajhEqOPM1HlSJz8qfxc6aWJIoSTWYaiC?= =?us-ascii?Q?QtqwJjqrhq4OhJMN0o3xOvx+MvEoSobDb1HoQNahXQcABr3/lXau+IenJSTc?= =?us-ascii?Q?ARpHnGO/WxcVuQyY3GaCvmJH68KyGkMRDbNwRezwIc+YwWB/cdznTt8di1h3?= =?us-ascii?Q?wWz5QZZak9neQMl5CTXoOVCZ/BIESklEBPA3/xpqupad4sW7wI8OhhQgeMrg?= =?us-ascii?Q?koTIy4jglnJ1YL+coHuhIv5MODg3b4976KbovpFZdIzN9ebolil5y0mTf5AV?= =?us-ascii?Q?pCDJjdWWO5B6gaDpul1RjfXfYB7I1RgmD+unl7cHvKCRu6qsuDhHf8xE5USz?= =?us-ascii?Q?XWyWi6t5KMfyc9zo/HoS/bRhgsSNtOw5fPdYaUegVXhiYTwlUz1qv0gzyBzi?= =?us-ascii?Q?zGQqe0YzjaNxG8/nhualBhZoCOGhkCOgspxc/wBHvWlTntRe+Hs4x8Ccf5Na?= =?us-ascii?Q?aVkjlrwGhWpVmqq8V5sUROgFJI5hDiCbEalpMlDiT2PsTr3NzSK/ANiLdnIn?= =?us-ascii?Q?JQsRbzss2GHef+Ob7EQ7lVnSIn7KnjWyqjtdiOPtZSQVFjT7MdMo7y0CEoHl?= =?us-ascii?Q?/fk+Vtq766OKoRVJnNjWUPA6edhRUNuv9jO6XVd5WKy6Kg3dWQzliMIFcv7L?= =?us-ascii?Q?pgjQD3Vm8Z/jbwJzXbKVZitJKp+bsGqhbOQnKLUwpOCTs6Lz4Mh31CEqQQ?= =?us-ascii?Q?=3D=3D?= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB03.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(1800799024)(36860700013)(7416014)(376014)(82310400026)(921020);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Jul 2025 07:51:40.3609 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 681f2862-8fb7-45a0-2615-08ddbdf44643 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BY1PEPF0001AE16.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB5986 Content-Type: text/plain; charset="utf-8" When hibernate with data center dGPUs, huge number of VRAM data will be moved to shmem during dev_pm_ops.prepare(). These shmem pages take a lot of system memory so that there's no enough free memory for creating the hibernation image. This will cause hibernation fail and abort. After dev_pm_ops.prepare(), call shrink_all_memory() to force move shmem pages to swap disk and reclaim the pages, so that there's enough system memory for hibernation image and less pages needed to copy to the image. This patch can only flush and free about half shmem pages. It will be better to flush and free more pages, even all of shmem pages, so that there're less pages to be copied to the hibernation image and the overall hibernation time can be reduced. Signed-off-by: Samuel Zhang --- kernel/power/hibernate.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c index 10a01af63a80..7ae9d9a7aa1d 100644 --- a/kernel/power/hibernate.c +++ b/kernel/power/hibernate.c @@ -370,6 +370,23 @@ static int create_image(int platform_mode) return error; } =20 +static void shrink_shmem_memory(void) +{ + struct sysinfo info; + unsigned long nr_shmem_pages, nr_freed_pages; + + si_meminfo(&info); + nr_shmem_pages =3D info.sharedram; /* current page count used for shmem */ + /* + * The intent is to reclaim all shmem pages. Though shrink_all_memory() c= an + * only reclaim about half of them, it's enough for creating the hibernat= ion + * image. + */ + nr_freed_pages =3D shrink_all_memory(nr_shmem_pages); + pr_debug("requested to reclaim %lu shmem pages, actually freed %lu pages\= n", + nr_shmem_pages, nr_freed_pages); +} + /** * hibernation_snapshot - Quiesce devices and create a hibernation image. * @platform_mode: If set, use platform driver to prepare for the transiti= on. @@ -411,6 +428,15 @@ int hibernation_snapshot(int platform_mode) goto Thaw; } =20 + /* + * Device drivers may move lots of data to shmem in dpm_prepare(). The sh= mem + * pages will use lots of system memory, causing hibernation image creati= on + * fail due to insufficient free memory. + * This call is to force flush the shmem pages to swap disk and reclaim + * the system memory so that image creation can succeed. + */ + shrink_shmem_memory(); + suspend_console(); pm_restrict_gfp_mask(); =20 --=20 2.43.5 From nobody Tue Oct 7 17:44:44 2025 Received: from NAM10-MW2-obe.outbound.protection.outlook.com (mail-mw2nam10on2072.outbound.protection.outlook.com [40.107.94.72]) (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 5996E29ACF6; Tue, 8 Jul 2025 07:51:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.94.72 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751961110; cv=fail; b=kH6oZ37IKvBpXQ3piYTJwruHhOnnpbwphvJdWP6mh5ZGLReDlQ9ZZMTBwOKdsGOwnsE57zD36RedpowStMLi8mO96W7E1ScREZsw2BemkR5xGD+sMfF/mbJdJCksnUpHpoqps9p/rsksQOjokxqmsd64MltMq4G/uoIfhu90xYc= ARC-Message-Signature: i=2; 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Tue, 8 Jul 2025 02:51:39 -0500 From: Samuel Zhang To: , , , , , , , , , , , , , , CC: , , , , , , , , , , "Samuel Zhang" Subject: [PATCH v3 4/5] PM: hibernate: add new api pm_transition_event() Date: Tue, 8 Jul 2025 15:42:47 +0800 Message-ID: <20250708074248.1674924-5-guoqing.zhang@amd.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20250708074248.1674924-1-guoqing.zhang@amd.com> References: <20250708074248.1674924-1-guoqing.zhang@amd.com> 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 Received-SPF: None (SATLEXMB04.amd.com: guoqing.zhang@amd.com does not designate permitted sender hosts) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS2PEPF00003439:EE_|BY5PR12MB4163:EE_ X-MS-Office365-Filtering-Correlation-Id: 75e8bc69-454b-4b2f-283e-08ddbdf4495e X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|7416014|376014|36860700013|1800799024|921020; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Jul 2025 07:51:45.6310 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 75e8bc69-454b-4b2f-283e-08ddbdf4495e X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DS2PEPF00003439.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR12MB4163 Content-Type: text/plain; charset="utf-8" dev_pm_ops.thaw() is called in following cases: * normal case: after hibernation image has been created. * error case 1: creation of a hibernation image has failed. * error case 2: restoration from a hibernation image has failed. For normal case, it is called mainly for resume storage devices for saving the hibernation image. Other devices that are not involved in the image saving do not need to resume the device. But since there's no api to know which case thaw() is called, device drivers can't conditionally resume device in thaw(). The new pm_transition_event() is such a api to query if thaw() is called in normal case. The returned value in thaw() is: * PM_EVENT_THAW: normal case, no need to resume non-storage devices. * PM_EVENT_RECOVER: error case, need to resume devices. Signed-off-by: Samuel Zhang --- drivers/base/power/main.c | 5 +++++ include/linux/pm.h | 16 ++++++++++++++++ 2 files changed, 21 insertions(+) diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index 40e1d8d8a589..7e0982caa4d4 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -62,6 +62,11 @@ static LIST_HEAD(dpm_noirq_list); =20 static DEFINE_MUTEX(dpm_list_mtx); static pm_message_t pm_transition; +int pm_transition_event(void) +{ + return pm_transition.event; +} +EXPORT_SYMBOL_GPL(pm_transition_event); =20 static int async_error; =20 diff --git a/include/linux/pm.h b/include/linux/pm.h index 78855d794342..d1cb77ede1a2 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -657,6 +657,22 @@ struct pm_subsys_data { #define DPM_FLAG_SMART_SUSPEND BIT(2) #define DPM_FLAG_MAY_SKIP_RESUME BIT(3) =20 +/** + * pm_transition_event() - Query the current pm transition event value. + * + * Used to query the reason why thaw() is called. 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Jul 2025 07:51:51.5486 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 92375cc1-0d12-4f22-1f23-08ddbdf44ce6 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DS2PEPF0000343A.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB8004 Content-Type: text/plain; charset="utf-8" For normal hibernation, GPU do not need to be resumed in thaw since it is not involved in writing the hibernation image. Skip resume in this case can reduce the hibernation time. On VM with 8 * 192GB VRAM dGPUs, 98% VRAM usage and 1.7TB system memory, this can save 50 minutes. Signed-off-by: Samuel Zhang --- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/= amdgpu/amdgpu_drv.c index 4f8632737574..10827becf855 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -2541,6 +2541,10 @@ amdgpu_pci_shutdown(struct pci_dev *pdev) if (amdgpu_ras_intr_triggered()) return; =20 + /* device maybe not resumed here, return immediately in this case */ + if (adev->in_s4 && adev->in_suspend) + return; + /* if we are running in a VM, make sure the device * torn down properly on reboot/shutdown. * unfortunately we can't detect certain @@ -2654,8 +2658,17 @@ static int amdgpu_pmops_freeze(struct device *dev) static int amdgpu_pmops_thaw(struct device *dev) { struct drm_device *drm_dev =3D dev_get_drvdata(dev); + int event =3D pm_transition_event(); =20 - return amdgpu_device_resume(drm_dev, true); + switch (event) { + case PM_EVENT_THAW: /* normal case */ + return 0; + case PM_EVENT_RECOVER: /* error case */ + return amdgpu_device_resume(drm_dev, true); + default: + pr_err("unknown pm_transition_event %d\n", event); + return -EOPNOTSUPP; + } } =20 static int amdgpu_pmops_poweroff(struct device *dev) --=20 2.43.5