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, 37 insertions, 0 deletions

diff --git a/Documentation/tools/kdoc_parser.rst b/Documentation/tools/kdoc_parser.rst
new file mode 100644
index 000000000..55b202173
--- /dev/null
+++ b/Documentation/tools/kdoc_parser.rst
@@ -0,0 +1,37 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+=======================
+Kernel-doc parser stage
+=======================
+
+C replacement rules used by the parser
+======================================
+
+.. automodule:: lib.python.kdoc.xforms_lists
+   :members:
+   :show-inheritance:
+   :undoc-members:
+
+File handler classes
+====================
+
+.. automodule:: lib.python.kdoc.kdoc_files
+   :members:
+   :show-inheritance:
+   :undoc-members:
+
+Parsed item data class
+======================
+
+.. automodule:: lib.python.kdoc.kdoc_item
+   :members:
+   :show-inheritance:
+   :undoc-members:
+
+Parser classes and methods
+==========================
+
+.. automodule:: lib.python.kdoc.kdoc_parser
+   :members:
+   :show-inheritance:
+   :undoc-members: