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, 52 insertions, 0 deletions

diff --git a/fs/lockd/Makefile b/fs/lockd/Makefile
new file mode 100644
index 000000000..3f9569d3b
--- /dev/null
+++ b/fs/lockd/Makefile
@@ -0,0 +1,52 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the linux lock manager stuff
+#
+
+ccflags-y += -I$(src)			# needed for trace events
+
+obj-$(CONFIG_LOCKD) += lockd.o
+
+lockd-y := clntlock.o clntproc.o clntxdr.o host.o svc.o svclock.o \
+	   svcshare.o svcproc.o svcsubs.o mon.o trace.o netlink.o \
+	   nlm3xdr_gen.o
+lockd-$(CONFIG_LOCKD_V4) += clnt4xdr.o svc4proc.o nlm4xdr_gen.o
+lockd-$(CONFIG_PROC_FS) += procfs.o
+
+#
+# XDR code generation (requires Python and additional packages)
+#
+# The generated *xdr_gen.{h,c} files are checked into git. Normal kernel
+# builds do not require the xdrgen tool or its Python dependencies.
+#
+# Developers modifying .x files in Documentation/sunrpc/xdr/ should run
+# "make xdrgen" to regenerate the affected files.
+#
+.PHONY: xdrgen
+
+XDRGEN			= ../../tools/net/sunrpc/xdrgen/xdrgen
+
+XDRGEN_DEFINITIONS	= ../../include/linux/sunrpc/xdrgen/nlm4.h \
+			  ../../include/linux/sunrpc/xdrgen/nlm3.h
+XDRGEN_DECLARATIONS	= nlm4xdr_gen.h nlm3xdr_gen.h
+XDRGEN_SOURCE		= nlm4xdr_gen.c nlm3xdr_gen.c
+
+xdrgen: $(XDRGEN_DEFINITIONS) $(XDRGEN_DECLARATIONS) $(XDRGEN_SOURCE)
+
+../../include/linux/sunrpc/xdrgen/nlm4.h: ../../Documentation/sunrpc/xdr/nlm4.x
+	$(XDRGEN) definitions $< > $@
+
+../../include/linux/sunrpc/xdrgen/nlm3.h: ../../Documentation/sunrpc/xdr/nlm3.x
+	$(XDRGEN) definitions $< > $@
+
+nlm4xdr_gen.h: ../../Documentation/sunrpc/xdr/nlm4.x
+	$(XDRGEN) declarations $< > $@
+
+nlm3xdr_gen.h: ../../Documentation/sunrpc/xdr/nlm3.x
+	$(XDRGEN) declarations $< > $@
+
+nlm4xdr_gen.c: ../../Documentation/sunrpc/xdr/nlm4.x
+	$(XDRGEN) source --peer server $< > $@
+
+nlm3xdr_gen.c: ../../Documentation/sunrpc/xdr/nlm3.x
+	$(XDRGEN) source --peer server $< > $@