Merge branches 'expcb.2026.07.24a', 'misc.2026.07.30a', 'rcu-tasks.2026.07.30a', 'srcu.2026.08.11a' and 'torture.2026.08.14a' into HEADgrafted

Changes:

Make expedited grace periods expedite normal RCU callbacks

Miscellaneous fixes:
 * Improve diagnostic output with character task states.
 * Mark accesses to inform KCSAN of concurrency design.
 * Move from kmalloc() to kmalloc_obj().
 * Documentation updates.
 * Improve handling of RCU deferred quiescent states.
 * Clean up unused function arguments and structure fields.
 * Reduce show_rcu_gp_kthreads() stack space.

Tasks RCU updates:
 * Clean up after SRCU re-implementation of Tasks Trace RCU.
 * Mark accesses to inform KCSAN of concurrency design.
 * Add ->lazy_timer status to diagnostic output.
 * Remove an unnecessary memory barrier.
 * Fix a data race, courtesy of KCSAN.
 * Documentation updates.
 * Convert cond_resched_tasks_rcu_qs() from macro to static inline
   function.

SRCU updates:
 * Add Rust helpers for SRCU.
 * Avoid losing queued work at cleanup_srcu_struct() time.

Torture-test updates:
 * Preparation work for immediate RCU priority deboosting.
 * Test RCU readers from real interrupt handlers (as opposed to softirq).
 * Simplify code through use of cpumask_next_wrap().
 * Improve diagnostic output with character task states.
 * Add rcutorture.nwriters parameter to allow lightweight stall testing,
   and rcutorture.stall_only to make doing so easier.
 * Test an RCU Tasks Trace grace period implying an RCU grace period.
 * Make RCU Tasks Trace torturing track reader batches.
 * Fix a data race, courtesy of KCSAN.
 * Plug a shuffle_tmp_mask memory leak on kthread spawn failure.

1 files changed, 64 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/debugfs-alienware-wmi b/Documentation/ABI/testing/debugfs-alienware-wmi
new file mode 100644
index 000000000..c7f525d6b
--- /dev/null
+++ b/Documentation/ABI/testing/debugfs-alienware-wmi
@@ -0,0 +1,64 @@
+What:		/sys/kernel/debug/alienware-wmi-<wmi_device_name>/system_description
+Date:		March 2025
+KernelVersion:	6.15
+Contact:	Kurt Borja <kuurtb@gmail.com>
+Description:
+		This file exposes the raw ``system_description`` number reported
+		by the WMAX device.
+
+		Only present on devices with the AWCC interface.
+
+		See Documentation/admin-guide/laptops/alienware-wmi.rst for
+		details.
+
+		RO
+
+What:		/sys/kernel/debug/alienware-wmi-<wmi_device_name>/hwmon_data
+Date:		March 2025
+KernelVersion:	6.15
+Contact:	Kurt Borja <kuurtb@gmail.com>
+Description:
+		This file exposes HWMON private data.
+
+		Includes fan sensor count, temperature sensor count, internal
+		fan IDs and internal temp IDs.
+
+		See Documentation/admin-guide/laptops/alienware-wmi.rst for
+		details.
+
+		RO
+
+What:		/sys/kernel/debug/alienware-wmi-<wmi_device_name>/pprof_data
+Date:		March 2025
+KernelVersion:	6.15
+Contact:	Kurt Borja <kuurtb@gmail.com>
+Description:
+		This file exposes Platform Profile private data.
+
+		Includes internal mapping to platform profiles and thermal
+		profile IDs.
+
+		See Documentation/admin-guide/laptops/alienware-wmi.rst for
+		details.
+
+		RO
+
+What:		/sys/kernel/debug/alienware-wmi-<wmi_device_name>/gpio_ctl/total_gpios
+Date:		May 2025
+KernelVersion:	6.16
+Contact:	Kurt Borja <kuurtb@gmail.com>
+Description:
+		Total number of GPIO pins reported by the device.
+
+		RO
+
+What:		/sys/kernel/debug/alienware-wmi-<wmi_device_name>/gpio_ctl/pinX
+Date:		May 2025
+KernelVersion:	6.16
+Contact:	Kurt Borja <kuurtb@gmail.com>
+Description:
+		This file controls GPIO pin X status.
+
+		See Documentation/wmi/devices/alienware-wmi.rst for details.
+
+		RW