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, 36 insertions, 0 deletions

diff --git a/tools/perf/MANIFEST b/tools/perf/MANIFEST
new file mode 100644
index 000000000..34af57b8e
--- /dev/null
+++ b/tools/perf/MANIFEST
@@ -0,0 +1,36 @@
+COPYING
+LICENSES/preferred/GPL-2.0
+arch/arm64/tools/gen-sysreg.awk
+arch/arm64/tools/syscall_64.tbl
+arch/arm64/tools/sysreg
+arch/*/include/uapi/asm/bpf_perf_event.h
+include/uapi/asm-generic/Kbuild
+tools/perf
+tools/arch
+tools/scripts
+tools/build
+tools/include
+tools/lib/api
+tools/lib/bpf
+tools/lib/subcmd
+tools/lib/perf
+tools/lib/argv_split.c
+tools/lib/ctype.c
+tools/lib/hweight.c
+tools/lib/rbtree.c
+tools/lib/string.c
+tools/lib/symbol
+tools/lib/find_bit.c
+tools/lib/bitmap.c
+tools/lib/list_sort.c
+tools/lib/str_error_r.c
+tools/lib/vsprintf.c
+tools/lib/zalloc.c
+scripts/bpf_doc.py
+scripts/Kbuild.include
+scripts/Makefile.asm-headers
+scripts/syscall.tbl
+scripts/syscallhdr.sh
+tools/bpf/bpftool
+kernel/bpf/disasm.c
+kernel/bpf/disasm.h