kernel.git/kernel/power/hibernate.c, branch linux-rolling-lts

Merge tag 'vfs-6.18-rc7.fixes' of gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs

2025-11-17T17:11:27Z

Pull vfs fixes from Christian Brauner: - Fix unitialized variable in statmount_string() - Fix hostfs mounting when passing host root during boot - Fix dynamic lookup to fail on cell lookup failure - Fix missing file type when reading bfs inodes from disk - Enforce checking of sb_min_blocksize() calls and update all callers accordingly - Restore write access before closing files opened by open_exec() in binfmt_misc - Always freeze efivarfs during suspend/hibernate cycles - Fix statmount()'s and listmount()'s grab_requested_mnt_ns() helper to actually allow mount namespace file descriptor in addition to mount namespace ids - Fix tmpfs remount when noswap is specified - Switch Landlock to iput_not_last() to remove false-positives from might_sleep() annotations in iput() - Remove dead node_to_mnt_ns() code - Ensure that per-queue kobjects are successfully created * tag 'vfs-6.18-rc7.fixes' of gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs: landlock: fix splats from iput() after it started calling might_sleep() fs: add iput_not_last() shmem: fix tmpfs reconfiguration (remount) when noswap is set fs/namespace: correctly handle errors returned by grab_requested_mnt_ns power: always freeze efivarfs binfmt_misc: restore write access before closing files opened by open_exec() block: add __must_check attribute to sb_min_blocksize() virtio-fs: fix incorrect check for fsvq->kobj xfs: check the return value of sb_min_blocksize() in xfs_fs_fill_super isofs: check the return value of sb_min_blocksize() in isofs_fill_super exfat: check return value of sb_min_blocksize in exfat_read_boot_sector vfat: fix missing sb_min_blocksize() return value checks mnt: Remove dead code which might prevent from building bfs: Reconstruct file type when loading from disk afs: Fix dynamic lookup to fail on cell lookup failure hostfs: Fix only passing host root in boot stage with new mount fs: Fix uninitialized 'offp' in statmount_string()

power: always freeze efivarfs

2025-11-12T09:12:39Z

The efivarfs filesystems must always be frozen and thawed to resync variable state. Make it so. Link: https://patch.msgid.link/20251105-vorbild-zutreffen-fe00d1dd98db@brauner Signed-off-by: Christian Brauner

PM: sleep: Allow pm_restrict_gfp_mask() stacking

2025-10-29T17:55:32Z

Allow pm_restrict_gfp_mask() to be called many times in a row to avoid issues with calling dpm_suspend_start() when the GFP mask has been already restricted. Only the first invocation of pm_restrict_gfp_mask() will actually restrict the GFP mask and the subsequent calls will warn if there is a mismatch between the expected allowed GFP mask and the actual one. Moreover, if pm_restrict_gfp_mask() is called many times in a row, pm_restore_gfp_mask() needs to be called matching number of times in a row to actually restore the GFP mask. Calling it when the GFP mask has not been restricted will cause it to warn. This is necessary for the GFP mask restriction starting in hibernation_snapshot() to continue throughout the entire hibernation flow until it completes or it is aborted (either by a wakeup event or by an error). Fixes: 449c9c02537a1 ("PM: hibernate: Restrict GFP mask in hibernation_snapshot()") Fixes: 469d80a3712c ("PM: hibernate: Fix hybrid-sleep") Reported-by: Askar Safin Closes: https://lore.kernel.org/linux-pm/20251025050812.421905-1-safinaskar@gmail.com/ Link: https://lore.kernel.org/linux-pm/20251028111730.2261404-1-safinaskar@gmail.com/ Signed-off-by: Rafael J. Wysocki Reviewed-by: Mario Limonciello (AMD) Tested-by: Mario Limonciello (AMD) Cc: 6.16+ # 6.16+ Link: https://patch.msgid.link/5935682.DvuYhMxLoT@rafael.j.wysocki

PM: hibernate: Combine return paths in power_down()

2025-09-26T18:36:36Z

To avoid code duplication and improve clarity, combine the code paths in power_down() leading to a return from that function. No intentional functional impact. Signed-off-by: Rafael J. Wysocki Reviewed-by: Mario Limonciello (AMD) Link: https://patch.msgid.link/3571055.QJadu78ljV@rafael.j.wysocki [ rjw: Changed the new label name to "exit" ] Signed-off-by: Rafael J. Wysocki

PM: hibernate: Restrict GFP mask in power_down()

2025-09-26T16:55:23Z

Commit 12ffc3b1513e ("PM: Restrict swap use to later in the suspend sequence") caused hibernation_platform_enter() to call pm_restore_gfp_mask() via dpm_resume_end(), so when power_down() returns after aborting hibernation_platform_enter(), it needs to match the pm_restore_gfp_mask() call in hibernate() that will occur subsequently. Address this by adding a pm_restrict_gfp_mask() call to the relevant error path in power_down(). Fixes: 12ffc3b1513e ("PM: Restrict swap use to later in the suspend sequence") Cc: 6.16+ # 6.16+ Signed-off-by: Rafael J. Wysocki Reviewed-by: Mario Limonciello (AMD)

PM: hibernate: Add pm_hibernation_mode_is_suspend()

2025-09-25T19:36:05Z

Some drivers have different flows for hibernation and suspend. If the driver opportunistically will skip thaw() then it needs a hint to know what is happening after the hibernate. Introduce a new symbol pm_hibernation_mode_is_suspend() that drivers can call to determine if suspending the system for this purpose. Tested-by: Ionut Nechita Tested-by: Kenneth Crudup Acked-by: Alex Deucher Signed-off-by: Mario Limonciello (AMD) Signed-off-by: Rafael J. Wysocki

PM: hibernate: Fix hybrid-sleep

2025-09-25T19:36:05Z

Hybrid sleep will hibernate the system followed by running through the suspend routine. Since both the hibernate and the suspend routine will call pm_restrict_gfp_mask(), pm_restore_gfp_mask() must be called before starting the suspend sequence. Add an explicit call to pm_restore_gfp_mask() to power_down() before the suspend sequence starts. Add an extra call for pm_restrict_gfp_mask() when exiting suspend so that the pm_restore_gfp_mask() call in hibernate() is balanced. Reported-by: Ionut Nechita Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4573 Tested-by: Ionut Nechita Fixes: 12ffc3b1513eb ("PM: Restrict swap use to later in the suspend sequence") Tested-by: Kenneth Crudup Acked-by: Alex Deucher Signed-off-by: Mario Limonciello (AMD) Link: https://patch.msgid.link/20250925185108.2968494-2-superm1@kernel.org [ rjw: Add comment explainig the new pm_restrict_gfp_mask() call purpose ] Cc: 6.16+ # 6.16+ Signed-off-by: Rafael J. Wysocki

PM: hibernate: Restrict GFP mask in hibernation_snapshot()

2025-09-10T18:36:43Z

Commit 12ffc3b1513e ("PM: Restrict swap use to later in the suspend sequence") incorrectly removed a pm_restrict_gfp_mask() call from hibernation_snapshot(), so memory allocations involving swap are not prevented from being carried out in this code path any more which may lead to serious breakage. The symptoms of such breakage have become visible after adding a shrink_shmem_memory() call to hibernation_snapshot() in commit 2640e819474f ("PM: hibernate: shrink shmem pages after dev_pm_ops.prepare()") which caused this problem to be much more likely to manifest itself. However, since commit 2640e819474f was initially present in the DRM tree that did not include commit 12ffc3b1513e, the symptoms of this issue were not visible until merge commit 260f6f4fda93 ("Merge tag 'drm-next-2025-07-30' of https://gitlab.freedesktop.org/drm/kernel") that exposed it through an entirely reasonable merge conflict resolution. Fixes: 12ffc3b1513e ("PM: Restrict swap use to later in the suspend sequence") Closes: https://bugzilla.kernel.org/show_bug.cgi?id=220555 Reported-by: Todd Brandt Tested-by: Todd Brandt Cc: 6.16+ # 6.16+ Signed-off-by: Rafael J. Wysocki Reviewed-by: Mario Limonciello (AMD)

Merge tag 'drm-next-2025-07-30' of https://gitlab.freedesktop.org/drm/kernel

2025-07-31T02:26:49Z

Pull drm updates from Dave Airlie: "Highlights: - Intel xe enable Panthor Lake, started adding WildCat Lake - amdgpu has a bunch of reset improvments along with the usual IP updates - msm got VM_BIND support which is important for vulkan sparse memory - more drm_panic users - gpusvm common code to handle a bunch of core SVM work outside drivers. Detail summary: Changes outside drm subdirectory: - 'shrink_shmem_memory()' for better shmem/hibernate interaction - Rust support infrastructure: - make ETIMEDOUT available - add size constants up to SZ_2G - add DMA coherent allocation bindings - mtd driver for Intel GPU non-volatile storage - i2c designware quirk for Intel xe core: - atomic helpers: tune enable/disable sequences - add task info to wedge API - refactor EDID quirks - connector: move HDR sink to drm_display_info - fourcc: half-float and 32-bit float formats - mode_config: pass format info to simplify dma-buf: - heaps: Give CMA heap a stable name ci: - add device tree validation and kunit displayport: - change AUX DPCD access probe address - add quirk for DPCD probe - add panel replay definitions - backlight control helpers fbdev: - make CONFIG_FIRMWARE_EDID available on all arches fence: - fix UAF issues format-helper: - improve tests gpusvm: - introduce devmem only flag for allocation - add timeslicing support to GPU SVM ttm: - improve eviction sched: - tracing improvements - kunit improvements - memory leak fixes - reset handling improvements color mgmt: - add hardware gamma LUT handling helpers bridge: - add destroy hook - switch to reference counted drm_bridge allocations - tc358767: convert to devm_drm_bridge_alloc - improve CEC handling panel: - switch to reference counter drm_panel allocations - fwnode panel lookup - Huiling hl055fhv028c support - Raspberry Pi 7" 720x1280 support - edp: KDC KD116N3730A05, N160JCE-ELL CMN, N116BCJ-EAK - simple: AUO P238HAN01 - st7701: Winstar wf40eswaa6mnn0 - visionox: rm69299-shift - Renesas R61307, Renesas R69328 support - DJN HX83112B hdmi: - add CEC handling - YUV420 output support xe: - WildCat Lake support - Enable PanthorLake by default - mark BMG as SRIOV capable - update firmware recommendations - Expose media OA units - aux-bux support for non-volatile memory - MTD intel-dg driver for non-volatile memory - Expose fan control and voltage regulator in sysfs - restructure migration for multi-device - Restore GuC submit UAF fix - make GEM shrinker drm managed - SRIOV VF Post-migration recovery of GGTT nodes - W/A additions/reworks - Prefetch support for svm ranges - Don't allocate managed BO for each policy change - HWMON fixes for BMG - Create LRC BO without VM - PCI ID updates - make SLPC debugfs files optional - rework eviction rejection of bound external BOs - consolidate PAT programming logic for pre/post Xe2 - init changes for flicker-free boot - Enable GuC Dynamic Inhibit Context switch i915: - drm_panic support for i915/xe - initial flip queue off by default for LNL/PNL - Wildcat Lake Display support - Support for DSC fractional link bpp - Support for simultaneous Panel Replay and Adaptive sync - Support for PTL+ double buffer LUT - initial PIPEDMC event handling - drm_panel_follower support - DPLL interface renames - allocate struct intel_display dynamically - flip queue preperation - abstract DRAM detection better - avoid GuC scheduling stalls - remove DG1 force probe requirement - fix MEI interrupt handler on RT kernels - use backlight control helpers for eDP - more shared display code refactoring amdgpu: - add userq slot to INFO ioctl - SR-IOV hibernation support - Suspend improvements - Backlight improvements - Use scaling for non-native eDP modes - cleaner shader updates for GC 9.x - Remove fence slab - SDMA fw checks for userq support - RAS updates - DMCUB updates - DP tunneling fixes - Display idle D3 support - Per queue reset improvements - initial smartmux support amdkfd: - enable KFD on loongarch - mtype fix for ext coherent system memory radeon: - CS validation additional GL extensions - drop console lock during suspend/resume - bump driver version msm: - VM BIND support - CI: infrastructure updates - UBWC single source of truth - decouple GPU and KMS support - DP: rework I/O accessors - DPU: SM8750 support - DSI: SM8750 support - GPU: X1-45 support and speedbin support for X1-85 - MDSS: SM8750 support nova: - register! macro improvements - DMA object abstraction - VBIOS parser + fwsec lookup - sysmem flush page support - falcon: generic falcon boot code and HAL - FWSEC-FRTS: fb setup and load/execute ivpu: - Add Wildcat Lake support - Add turbo flag ast: - improve hardware generations implementation imx: - IMX8qxq Display Controller support lima: - Rockchip RK3528 GPU support nouveau: - fence handling cleanup panfrost: - MT8370 support - bo labeling - 64-bit register access qaic: - add RAS support rockchip: - convert inno_hdmi to a bridge rz-du: - add RZ/V2H(P) support - MIPI-DSI DCS support sitronix: - ST7567 support sun4i: - add H616 support tidss: - add TI AM62L support - AM65x OLDI bridge support bochs: - drm panic support vkms: - YUV and R* format support - use faux device vmwgfx: - fence improvements hyperv: - move out of simple - add drm_panic support" * tag 'drm-next-2025-07-30' of https://gitlab.freedesktop.org/drm/kernel: (1479 commits) drm/tidss: oldi: convert to devm_drm_bridge_alloc() API drm/tidss: encoder: convert to devm_drm_bridge_alloc() drm/amdgpu: move reset support type checks into the caller drm/amdgpu/sdma7: re-emit unprocessed state on ring reset drm/amdgpu/sdma6: re-emit unprocessed state on ring reset drm/amdgpu/sdma5.2: re-emit unprocessed state on ring reset drm/amdgpu/sdma5: re-emit unprocessed state on ring reset drm/amdgpu/gfx12: re-emit unprocessed state on ring reset drm/amdgpu/gfx11: re-emit unprocessed state on ring reset drm/amdgpu/gfx10: re-emit unprocessed state on ring reset drm/amdgpu/gfx9.4.3: re-emit unprocessed state on kcq reset drm/amdgpu/gfx9: re-emit unprocessed state on kcq reset drm/amdgpu: Add WARN_ON to the resource clear function drm/amd/pm: Use cached metrics data on SMUv13.0.6 drm/amd/pm: Use cached data for min/max clocks gpu: nova-core: fix bounds check in PmuLookupTableEntry::new drm/amdgpu: Replace HQD terminology with slots naming drm/amdgpu: Add user queue instance count in HW IP info drm/amd/amdgpu: Add helper functions for isp buffers drm/amd/amdgpu: Initialize swnode for ISP MFD device ...

PM: hibernate: shrink shmem pages after dev_pm_ops.prepare()

2025-07-10T15:49:45Z

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 Acked-by: Rafael J. Wysocki Link: https://lore.kernel.org/r/20250710062313.3226149-4-guoqing.zhang@amd.com Signed-off-by: Mario Limonciello