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, 222 insertions, 0 deletions

diff --git a/drivers/hwmon/tmp103.c b/drivers/hwmon/tmp103.c
new file mode 100644
index 000000000..f13d24767
--- /dev/null
+++ b/drivers/hwmon/tmp103.c
@@ -0,0 +1,222 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Texas Instruments TMP103 SMBus temperature sensor driver
+ * Copyright (C) 2014 Heiko Schocher <hs@denx.de>
+ *
+ * Based on:
+ * Texas Instruments TMP102 SMBus temperature sensor driver
+ *
+ * Copyright (C) 2010 Steven King <sfking@fdwdc.com>
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/hwmon.h>
+#include <linux/err.h>
+#include <linux/device.h>
+#include <linux/regmap.h>
+
+#define TMP103_TEMP_REG		0x00
+#define TMP103_CONF_REG		0x01
+#define TMP103_TLOW_REG		0x02
+#define TMP103_THIGH_REG	0x03
+
+#define TMP103_CONF_M0		0x01
+#define TMP103_CONF_M1		0x02
+#define TMP103_CONF_LC		0x04
+#define TMP103_CONF_FL		0x08
+#define TMP103_CONF_FH		0x10
+#define TMP103_CONF_CR0		0x20
+#define TMP103_CONF_CR1		0x40
+#define TMP103_CONF_ID		0x80
+#define TMP103_CONF_SD		(TMP103_CONF_M1)
+#define TMP103_CONF_SD_MASK	(TMP103_CONF_M0 | TMP103_CONF_M1)
+
+#define TMP103_CONFIG		(TMP103_CONF_CR1 | TMP103_CONF_M1)
+#define TMP103_CONFIG_MASK	(TMP103_CONF_CR0 | TMP103_CONF_CR1 | \
+				 TMP103_CONF_M0 | TMP103_CONF_M1)
+
+static inline int tmp103_reg_to_mc(s8 val)
+{
+	return val * 1000;
+}
+
+static inline u8 tmp103_mc_to_reg(int val)
+{
+	return DIV_ROUND_CLOSEST(val, 1000);
+}
+
+static int tmp103_read(struct device *dev, enum hwmon_sensor_types type,
+		       u32 attr, int channel, long *temp)
+{
+	struct regmap *regmap = dev_get_drvdata(dev);
+	unsigned int regval;
+	int err, reg;
+
+	switch (attr) {
+	case hwmon_temp_input:
+		reg = TMP103_TEMP_REG;
+		break;
+	case hwmon_temp_min:
+		reg = TMP103_TLOW_REG;
+		break;
+	case hwmon_temp_max:
+		reg = TMP103_THIGH_REG;
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	err = regmap_read(regmap, reg, &regval);
+	if (err < 0)
+		return err;
+
+	*temp = tmp103_reg_to_mc(regval);
+
+	return 0;
+}
+
+static int tmp103_write(struct device *dev, enum hwmon_sensor_types type,
+			u32 attr, int channel, long temp)
+{
+	struct regmap *regmap = dev_get_drvdata(dev);
+	int reg;
+
+	switch (attr) {
+	case hwmon_temp_min:
+		reg = TMP103_TLOW_REG;
+		break;
+	case hwmon_temp_max:
+		reg = TMP103_THIGH_REG;
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	temp = clamp_val(temp, -55000, 127000);
+	return regmap_write(regmap, reg, tmp103_mc_to_reg(temp));
+}
+
+static umode_t tmp103_is_visible(const void *data, enum hwmon_sensor_types type,
+				 u32 attr, int channel)
+{
+	if (type != hwmon_temp)
+		return 0;
+
+	switch (attr) {
+	case hwmon_temp_input:
+		return 0444;
+	case hwmon_temp_min:
+	case hwmon_temp_max:
+		return 0644;
+	default:
+		return 0;
+	}
+}
+
+static const struct hwmon_channel_info * const tmp103_info[] = {
+	HWMON_CHANNEL_INFO(chip,
+			   HWMON_C_REGISTER_TZ),
+	HWMON_CHANNEL_INFO(temp,
+			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MIN),
+	NULL
+};
+
+static const struct hwmon_ops tmp103_hwmon_ops = {
+	.is_visible = tmp103_is_visible,
+	.read = tmp103_read,
+	.write = tmp103_write,
+};
+
+static const struct hwmon_chip_info tmp103_chip_info = {
+	.ops = &tmp103_hwmon_ops,
+	.info = tmp103_info,
+};
+
+static bool tmp103_regmap_is_volatile(struct device *dev, unsigned int reg)
+{
+	return reg == TMP103_TEMP_REG;
+}
+
+static const struct regmap_config tmp103_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = TMP103_THIGH_REG,
+	.volatile_reg = tmp103_regmap_is_volatile,
+};
+
+static int tmp103_probe(struct i2c_client *client)
+{
+	struct device *dev = &client->dev;
+	struct device *hwmon_dev;
+	struct regmap *regmap;
+	int ret;
+
+	regmap = devm_regmap_init_i2c(client, &tmp103_regmap_config);
+	if (IS_ERR(regmap)) {
+		dev_err(dev, "failed to allocate register map\n");
+		return PTR_ERR(regmap);
+	}
+
+	ret = regmap_update_bits(regmap, TMP103_CONF_REG, TMP103_CONFIG_MASK,
+				 TMP103_CONFIG);
+	if (ret < 0) {
+		dev_err(&client->dev, "error writing config register\n");
+		return ret;
+	}
+
+	i2c_set_clientdata(client, regmap);
+	hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,
+							 regmap,
+							 &tmp103_chip_info,
+							 NULL);
+	return PTR_ERR_OR_ZERO(hwmon_dev);
+}
+
+static int tmp103_suspend(struct device *dev)
+{
+	struct regmap *regmap = dev_get_drvdata(dev);
+
+	return regmap_update_bits(regmap, TMP103_CONF_REG,
+				  TMP103_CONF_SD_MASK, 0);
+}
+
+static int tmp103_resume(struct device *dev)
+{
+	struct regmap *regmap = dev_get_drvdata(dev);
+
+	return regmap_update_bits(regmap, TMP103_CONF_REG,
+				  TMP103_CONF_SD_MASK, TMP103_CONF_SD);
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(tmp103_dev_pm_ops, tmp103_suspend, tmp103_resume);
+
+static const struct i2c_device_id tmp103_id[] = {
+	{ .name = "tmp103" },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, tmp103_id);
+
+static const struct of_device_id __maybe_unused tmp103_of_match[] = {
+	{ .compatible = "ti,tmp103" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, tmp103_of_match);
+
+static struct i2c_driver tmp103_driver = {
+	.driver = {
+		.name	= "tmp103",
+		.of_match_table = of_match_ptr(tmp103_of_match),
+		.pm	= pm_sleep_ptr(&tmp103_dev_pm_ops),
+	},
+	.probe		= tmp103_probe,
+	.id_table	= tmp103_id,
+};
+
+module_i2c_driver(tmp103_driver);
+
+MODULE_AUTHOR("Heiko Schocher <hs@denx.de>");
+MODULE_DESCRIPTION("Texas Instruments TMP103 temperature sensor driver");
+MODULE_LICENSE("GPL");