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, 127 insertions, 0 deletions

diff --git a/drivers/accessibility/speakup/makemapdata.c b/drivers/accessibility/speakup/makemapdata.c
new file mode 100644
index 000000000..55e4ef8a9
--- /dev/null
+++ b/drivers/accessibility/speakup/makemapdata.c
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* makemapdata.c
+ * originally written by: Kirk Reiser.
+ *
+ ** Copyright (C) 2002  Kirk Reiser.
+ *  Copyright (C) 2003  David Borowski.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <libgen.h>
+#include <string.h>
+#include <ctype.h>
+#include "utils.h"
+
+static char buffer[256];
+
+static int get_define(void)
+{
+	char *c;
+
+	while (fgets(buffer, sizeof(buffer)-1, infile)) {
+		lc++;
+		if (strncmp(buffer, "#define", 7))
+			continue;
+		c = buffer + 7;
+		while (*c == ' ' || *c == '\t')
+			c++;
+		def_name = c;
+		while (*c && *c != ' ' && *c != '\t' && *c != '\n')
+			c++;
+		if (!*c || *c == '\n')
+			continue;
+		*c++ = '\0';
+		while (*c == ' ' || *c == '\t' || *c == '(')
+			c++;
+		def_val = c;
+		while (*c && *c != '\n' && *c != ')')
+			c++;
+		*c++ = '\0';
+		return 1;
+	}
+	fclose(infile);
+	infile = 0;
+	return 0;
+}
+
+int
+main(int argc, char *argv[])
+{
+	int value, i;
+	struct st_key *this;
+	const char *dir_name, *spk_dir_name;
+	char *cp;
+
+	dir_name = getenv("TOPDIR");
+	if (!dir_name)
+		dir_name = ".";
+	spk_dir_name = getenv("SPKDIR");
+	if (!spk_dir_name)
+		spk_dir_name = "drivers/accessibility/speakup";
+	bzero(key_table, sizeof(key_table));
+	add_key("shift",	1, is_shift);
+	add_key("altgr",	2, is_shift);
+	add_key("ctrl",	4, is_shift);
+	add_key("alt",	8, is_shift);
+	add_key("spk", 16, is_shift);
+	add_key("double", 32, is_shift);
+
+	open_input(dir_name, "include/linux/input.h");
+	while (get_define()) {
+		if (strncmp(def_name, "KEY_", 4))
+			continue;
+		value = atoi(def_val);
+		if (value > 0 && value < MAXKEYVAL)
+			add_key(def_name, value, is_input);
+	}
+
+	open_input(dir_name, "include/uapi/linux/input-event-codes.h");
+	while (get_define()) {
+		if (strncmp(def_name, "KEY_", 4))
+			continue;
+		value = atoi(def_val);
+		if (value > 0 && value < MAXKEYVAL)
+			add_key(def_name, value, is_input);
+	}
+
+	open_input(spk_dir_name, "spk_priv_keyinfo.h");
+	while (get_define()) {
+		if (strlen(def_val) > 5) {
+			//if (def_val[0] == '(')
+			//	def_val++;
+			cp = strchr(def_val, '+');
+			if (!cp)
+				continue;
+			if (cp[-1] == ' ')
+				cp[-1] = '\0';
+			*cp++ = '\0';
+			this = find_key(def_val);
+			while (*cp == ' ')
+				cp++;
+			if (!this || *cp < '0' || *cp > '9')
+				continue;
+			value = this->value+atoi(cp);
+		} else if (!strncmp(def_val, "0x", 2))
+			sscanf(def_val+2, "%x", &value);
+		else if (*def_val >= '0' && *def_val <= '9')
+			value = atoi(def_val);
+		else
+			continue;
+		add_key(def_name, value, is_spk);
+	}
+
+	printf("struct st_key_init init_key_data[] = {\n");
+	for (i = 0; i < HASHSIZE; i++) {
+		this = &key_table[i];
+		if (!this->name)
+			continue;
+		do {
+			printf("\t{ \"%s\", %d, %d, },\n", this->name, this->value, this->shift);
+			this = this->next;
+		} while (this);
+	}
+	printf("\t{ \".\", 0, 0 }\n};\n");
+
+	exit(0);
+}