kernel/linux.git/drivers/dpll/dpll_core.c, branch v7.0.10

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51+00:00

This was done entirely with mindless brute force, using git grep -l '\

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28+00:00

This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook

dpll: Add reference count tracking support

2026-02-05T14:57:46+00:00

Add support for the REF_TRACKER infrastructure to the DPLL subsystem. When enabled, this allows developers to track and debug reference counting leaks or imbalances for dpll_device and dpll_pin objects. It records stack traces for every get/put operation and exposes this information via debugfs at: /sys/kernel/debug/ref_tracker/dpll_device_* /sys/kernel/debug/ref_tracker/dpll_pin_* The following API changes are made to support this: 1. dpll_device_get() / dpll_device_put() now accept a 'dpll_tracker *' (which is a typedef to 'struct ref_tracker *' when enabled, or an empty struct otherwise). 2. dpll_pin_get() / dpll_pin_put() and fwnode_dpll_pin_find() similarly accept the tracker argument. 3. Internal registration structures now hold a tracker to associate the reference held by the registration with the specific owner. All existing in-tree drivers (ice, mlx5, ptp_ocp, zl3073x) are updated to pass NULL for the new tracker argument, maintaining current behavior while enabling future debugging capabilities. Reviewed-by: Aleksandr Loktionov Co-developed-by: Petr Oros Signed-off-by: Petr Oros Signed-off-by: Ivan Vecera Reviewed-by: Arkadiusz Kubalewski Link: https://patch.msgid.link/20260203174002.705176-8-ivecera@redhat.com Signed-off-by: Paolo Abeni

dpll: Enhance and consolidate reference counting logic

2026-02-05T14:57:46+00:00

Refactor the reference counting mechanism for DPLL devices and pins to improve consistency and prevent potential lifetime issues. Introduce internal helpers __dpll_{device,pin}_{hold,put}() to centralize reference management. Update the internal XArray reference helpers (dpll_xa_ref_*) to automatically grab a reference to the target object when it is added to a list, and release it when removed. This ensures that objects linked internally (e.g., pins referenced by parent pins) are properly kept alive without relying on the caller to manually manage the count. Consequently, remove the now redundant manual `refcount_inc/dec` calls in dpll_pin_on_pin_{,un}register()`, as ownership is now correctly handled by the dpll_xa_ref_* functions. Additionally, ensure that dpll_device_{,un}register()` takes/releases a reference to the device, ensuring the device object remains valid for the duration of its registration. Reviewed-by: Aleksandr Loktionov Signed-off-by: Ivan Vecera Reviewed-by: Arkadiusz Kubalewski Link: https://patch.msgid.link/20260203174002.705176-7-ivecera@redhat.com Signed-off-by: Paolo Abeni

dpll: Support dynamic pin index allocation

2026-02-05T14:57:46+00:00

Allow drivers to register DPLL pins without manually specifying a pin index. Currently, drivers must provide a unique pin index when calling dpll_pin_get(). This works well for hardware-mapped pins but creates friction for drivers handling virtual pins or those without a strict hardware indexing scheme. Introduce DPLL_PIN_IDX_UNSPEC (U32_MAX). When a driver passes this value as the pin index: 1. The core allocates a unique index using an IDA 2. The allocated index is mapped to a range starting above `INT_MAX` This separation ensures that dynamically allocated indices never collide with standard driver-provided hardware indices, which are assumed to be within the `0` to `INT_MAX` range. The index is automatically freed when the pin is released in dpll_pin_put(). Reviewed-by: Aleksandr Loktionov Signed-off-by: Ivan Vecera Reviewed-by: Arkadiusz Kubalewski Link: https://patch.msgid.link/20260203174002.705176-5-ivecera@redhat.com Signed-off-by: Paolo Abeni

dpll: Add notifier chain for dpll events

2026-02-05T14:57:46+00:00

Currently, the DPLL subsystem reports events (creation, deletion, changes) to userspace via Netlink. However, there is no mechanism for other kernel components to be notified of these events directly. Add a raw notifier chain to the DPLL core protected by dpll_lock. This allows other kernel subsystems or drivers to register callbacks and receive notifications when DPLL devices or pins are created, deleted, or modified. Define the following: - Registration helpers: {,un}register_dpll_notifier() - Event types: DPLL_DEVICE_CREATED, DPLL_PIN_CREATED, etc. - Context structures: dpll_{device,pin}_notifier_info to pass relevant data to the listeners. The notification chain is invoked alongside the existing Netlink event generation to ensure in-kernel listeners are kept in sync with the subsystem state. Reviewed-by: Vadim Fedorenko Co-developed-by: Ivan Vecera Signed-off-by: Ivan Vecera Signed-off-by: Petr Oros Reviewed-by: Arkadiusz Kubalewski Reviewed-by: Aleksandr Loktionov Link: https://patch.msgid.link/20260203174002.705176-4-ivecera@redhat.com Signed-off-by: Paolo Abeni

dpll: Allow associating dpll pin with a firmware node

2026-02-05T14:57:46+00:00

Extend the DPLL core to support associating a DPLL pin with a firmware node. This association is required to allow other subsystems (such as network drivers) to locate and request specific DPLL pins defined in the Device Tree or ACPI. * Add a .fwnode field to the struct dpll_pin * Introduce dpll_pin_fwnode_set() helper to allow the provider driver to associate a pin with a fwnode after the pin has been allocated * Introduce fwnode_dpll_pin_find() helper to allow consumers to search for a registered DPLL pin using its associated fwnode handle * Ensure the fwnode reference is properly released in dpll_pin_put() Reviewed-by: Aleksandr Loktionov Reviewed-by: Vadim Fedorenko Signed-off-by: Ivan Vecera Reviewed-by: Arkadiusz Kubalewski Link: https://patch.msgid.link/20260203174002.705176-2-ivecera@redhat.com Signed-off-by: Paolo Abeni

dpll: Prevent duplicate registrations

2026-01-22T16:08:42+00:00

Modify the internal registration helpers dpll_xa_ref_{dpll,pin}_add() to reject duplicate registration attempts. Previously, if a caller attempted to register the same pin multiple times (with the same ops, priv, and cookie) on the same device, the core silently increments the reference count and return success. This behavior is incorrect because if the caller makes these duplicate registrations then for the first one dpll_pin_registration is allocated and for others the associated dpll_pin_ref.refcount is incremented. During the first unregistration the associated dpll_pin_registration is freed and for others WARN is fired. Fix this by updating the logic to return `-EEXIST` if a matching registration is found to enforce a strict "register once" policy. Fixes: 9431063ad323 ("dpll: core: Add DPLL framework base functions") Signed-off-by: Ivan Vecera Reviewed-by: Arkadiusz Kubalewski Reviewed-by: Vadim Fedorenko Link: https://patch.msgid.link/20260121130012.112606-1-ivecera@redhat.com Signed-off-by: Jakub Kicinski

dpll: add reference sync get/set

2025-06-27T23:38:02+00:00

Define function for reference sync pin registration and callback ops to set/get current feature state. Implement netlink handler to fill netlink messages with reference sync pin configuration of capable pins (pin-get). Implement netlink handler to call proper ops and configure reference sync pin state (pin-set). Reviewed-by: Przemek Kitszel Reviewed-by: Milena Olech Reviewed-by: Jiri Pirko Signed-off-by: Arkadiusz Kubalewski Link: https://patch.msgid.link/20250626135219.1769350-3-arkadiusz.kubalewski@intel.com Signed-off-by: Jakub Kicinski

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2025-03-20T20:38:01+00:00

Cross-merge networking fixes after downstream PR (net-6.14-rc8). Conflict: tools/testing/selftests/net/Makefile 03544faad761 ("selftest: net: add proc_net_pktgen") 3ed61b8938c6 ("selftests: net: test for lwtunnel dst ref loops") tools/testing/selftests/net/config: 85cb3711acb8 ("selftests: net: Add test cases for link and peer netns") 3ed61b8938c6 ("selftests: net: test for lwtunnel dst ref loops") Adjacent commits: tools/testing/selftests/net/Makefile c935af429ec2 ("selftests: net: add support for testing SO_RCVMARK and SO_RCVPRIORITY") 355d940f4d5a ("Revert "selftests: Add IPv6 link-local address generation tests for GRE devices."") Signed-off-by: Paolo Abeni