linux-rng/kernel/power, branch master

Merge branches 'pm-qos' and 'pm-tools'

2025-11-28T15:50:45Z

Merge PM QoS updates and a cpupower utility update for 6.19-rc1: - Introduce and document a QoS limit on CPU exit latency during wakeup from suspend-to-idle (Ulf Hansson) - Add support for building libcpupower statically (Zuo An) * pm-qos: Documentation: power/cpuidle: Document the CPU system wakeup latency QoS cpuidle: Respect the CPU system wakeup QoS limit for cpuidle sched: idle: Respect the CPU system wakeup QoS limit for s2idle pmdomain: Respect the CPU system wakeup QoS limit for cpuidle pmdomain: Respect the CPU system wakeup QoS limit for s2idle PM: QoS: Introduce a CPU system wakeup QoS limit * pm-tools: tools/power/cpupower: Support building libcpupower statically

Merge branches 'pm-em' and 'pm-opp'

2025-11-28T15:44:00Z

Merge energy model management updates and operating performance points (OPP) library changes for 6.19-rc1: - Add support for sending netlink notifications to user space on energy model updates (Changwoo Mini, Peng Fan) - Minor improvements to the Rust OPP interface (Tamir Duberstein) - Fixes to scope-based pointers in the OPP library (Viresh Kumar) * pm-em: PM: EM: Add to em_pd_list only when no failure PM: EM: Notify an event when the performance domain changes PM: EM: Implement em_notify_pd_created/updated() PM: EM: Implement em_notify_pd_deleted() PM: EM: Implement em_nl_get_pd_table_doit() PM: EM: Implement em_nl_get_pds_doit() PM: EM: Add an iterator and accessor for the performance domain PM: EM: Add a skeleton code for netlink notification PM: EM: Add em.yaml and autogen files PM: EM: Expose the ID of a performance domain via debugfs PM: EM: Assign a unique ID when creating a performance domain * pm-opp: rust: opp: simplify callers of `to_c_str_array` OPP: Initialize scope-based pointers inline rust: opp: fix broken rustdoc link

Merge branch 'pm-sleep'

2025-11-28T15:01:13Z

Merge updates related to system suspend and hibernation for 6.19-rc1: - Replace snprintf() with scnprintf() in show_trace_dev_match() (Kaushlendra Kumar) - Fix memory allocation error handling in pm_vt_switch_required() (Malaya Kumar Rout) - Introduce CALL_PM_OP() macro and use it to simplify code in generic PM operations (Kaushlendra Kumar) - Add module param to backtrace all CPUs in the device power management watchdog (Sergey Senozhatsky) - Rework message printing in swsusp_save() (Rafael Wysocki) - Make it possible to change the number of hibernation compression threads (Xueqin Luo) - Clarify that only cgroup1 freezer uses PM freezer (Tejun Heo) - Add document on debugging shutdown hangs to PM documentation and correct a mistaken configuration option in it (Mario Limonciello) - Shut down wakeup source timer before removing the wakeup source from the list (Kaushlendra Kumar, Rafael Wysocki) - Introduce new PMSG_POWEROFF event for system shutdown handling with the help of PM device callbacks (Mario Limonciello) - Make pm_test delay interruptible by wakeup events (Riwen Lu) - Clean up kernel-doc comment style usage in the core hibernation code and remove unuseful comments from it (Sunday Adelodun, Rafael Wysocki) - Add support for handling wakeup events and aborting the suspend process while it is syncing file systems (Samuel Wu, Rafael Wysocki) * pm-sleep: (21 commits) PM: hibernate: Extra cleanup of comments in swap handling code PM: sleep: Call pm_sleep_fs_sync() instead of ksys_sync_helper() PM: sleep: Add support for wakeup during filesystem sync PM: hibernate: Clean up kernel-doc comment style usage PM: suspend: Make pm_test delay interruptible by wakeup events usb: sl811-hcd: Add PM_EVENT_POWEROFF into suspend callbacks scsi: Add PM_EVENT_POWEROFF into suspend callbacks PM: Introduce new PMSG_POWEROFF event PM: wakeup: Update after recent wakeup source removal ordering change PM: wakeup: Delete timer before removing wakeup source from list Documentation: power: Correct a mistaken configuration option Documentation: power: Add document on debugging shutdown hangs freezer: Clarify that only cgroup1 freezer uses PM freezer PM: hibernate: add sysfs interface for hibernate_compression_threads PM: hibernate: make compression threads configurable PM: hibernate: dynamically allocate crc->unc_len/unc for configurable threads PM: hibernate: Rework message printing in swsusp_save() PM: dpm_watchdog: add module param to backtrace all CPUs PM: sleep: Introduce CALL_PM_OP() macro to simplify code PM: console: Fix memory allocation error handling in pm_vt_switch_required() ...

Merge branches 'pm-core' and 'pm-runtime'

2025-11-28T14:56:09Z

Merge a core power management update and runtime PM framework updates for 6.19-rc1: - Add WQ_UNBOUND to pm_wq workqueue (Marco Crivellari) - Add runtime PM wrapper macros for ACQUIRE()/ACQUIRE_ERR() and use them in the PCI core and the ACPI TAD driver (Rafael Wysocki) - Improve runtime PM in the ACPI TAD driver (Rafael Wysocki) - Update pm_runtime_allow/forbid() documentation (Rafael Wysocki) - Fix typos in runtime.c comments (Malaya Kumar Rout) * pm-core: PM: WQ_UNBOUND added to pm_wq workqueue * pm-runtime: PCI/sysfs: Use PM_RUNTIME_ACQUIRE()/PM_RUNTIME_ACQUIRE_ERR() ACPI: TAD: Use PM_RUNTIME_ACQUIRE()/PM_RUNTIME_ACQUIRE_ERR() PM: runtime: Wrapper macros for ACQUIRE()/ACQUIRE_ERR() PM: runtime: fix typos in runtime.c comments ACPI: TAD: Improve runtime PM using guard macros ACPI: TAD: Rearrange runtime PM operations in acpi_tad_remove() PM: runtime: docs: Update pm_runtime_allow/forbid() documentation

PM: QoS: Introduce a CPU system wakeup QoS limit

2025-11-25T18:01:29Z

Some platforms supports multiple low power states for CPUs that can be used when entering system-wide suspend. Currently we are always selecting the deepest possible state for the CPUs, which can break the system wakeup latency constraint that may be required for a use case. Let's take the first step towards addressing this problem, by introducing an interface for user space, that allows us to specify the CPU system wakeup QoS limit. Subsequent changes will start taking into account the new QoS limit. Reviewed-by: Dhruva Gole Reviewed-by: Kevin Hilman (TI) Tested-by: Kevin Hilman (TI) Signed-off-by: Ulf Hansson Link: https://patch.msgid.link/20251125112650.329269-2-ulf.hansson@linaro.org Signed-off-by: Rafael J. Wysocki

PM: hibernate: Extra cleanup of comments in swap handling code

2025-11-24T19:41:06Z

Continue recent cleanups of comments in the swap handling code. Unify the use of white space in the comments, drop some unuseful comments outside function bodies, and move some other comments into function bodies. No functional impact. Signed-off-by: Rafael J. Wysocki Link: https://patch.msgid.link/5943864.DvuYhMxLoT@rafael.j.wysocki

PM: sleep: Call pm_sleep_fs_sync() instead of ksys_sync_helper()

2025-11-20T21:29:40Z

Replace the direct calls to ksys_sync_helper() with the new pm_sleep_fs_sync() in suspend and hibernation code paths. This enables the new mechanism allowing the filesystem sync phase to be interrupted. Suggested-by: Saravana Kannan Signed-off-by: Samuel Wu Co-developed-by: Rafael J. Wysocki [ rjw: Subject and changelog edits, tags adjustment ] Link: https://patch.msgid.link/20251119171426.4086783-3-wusamuel@google.com Signed-off-by: Rafael J. Wysocki

PM: sleep: Add support for wakeup during filesystem sync

2025-11-20T21:29:40Z

Add helper function pm_sleep_fs_sync() and related data structures as a preparation for allowing system suspend and hibernation to be aborted by wakeup events while syncing file systems. The new function, to be called by the suspend process in order to sync file systems, uses a dedicated ordered workqueue to run ksys_sync_helper() in parallel with the calling process. Next, it waits for the completion of the filesystem sync and periodically checks if any system wakeup events are pending, in which case it will return an error. If that happens while the filesystem sync is still in progress, it will continue, possibly after pm_sleep_fs_sync() has returned, and if that function is called again before the sync is complete, a new work item to run ksys_sync_helper() again will be queued (and waited for) to increase the likelihood of writing all of the dirty pages in memory back to persistent storage. Suggested-by: Saravana Kannan Signed-off-by: Samuel Wu Co-developed-by: Rafael J. Wysocki [ rjw: Subject and changelog rewrite, tags adjustment ] Link: https://patch.msgid.link/20251119171426.4086783-2-wusamuel@google.com Signed-off-by: Rafael J. Wysocki

PM: hibernate: Clean up kernel-doc comment style usage

2025-11-17T19:16:56Z

Several static functions in kernel/power/swap.c were described using the kernel-doc comment style (/** ... */) even though they are not exported or referenced by generated documentation. This led to kernel-doc warnings and stylistic inconsistencies. Convert these unnecessary kernel-doc blocks to regular C comments, remove comment blocks that are no longer useful, relocate comments to more appropriate positions where needed, and fix a few "Return:" descriptions that were either missing or incorrectly formatted. No functional changes. Signed-off-by: Sunday Adelodun [ rjw: Subject adjustment, changelog edits, comment edits ] Link: https://patch.msgid.link/20251114220438.52448-1-adelodunolaoluwa@yahoo.com Signed-off-by: Rafael J. Wysocki

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()