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-rw-r--r--drivers/base/arch_topology.c6
-rw-r--r--drivers/base/core.c48
-rw-r--r--drivers/base/module.c4
-rw-r--r--drivers/base/regmap/internal.h1
-rw-r--r--drivers/base/regmap/regcache-maple.c3
-rw-r--r--drivers/base/regmap/regmap-irq.c9
-rw-r--r--drivers/base/regmap/regmap-kunit.c45
-rw-r--r--drivers/base/regmap/regmap.c1
8 files changed, 99 insertions, 18 deletions
diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
index 75fcb75d5515..3ebe77566788 100644
--- a/drivers/base/arch_topology.c
+++ b/drivers/base/arch_topology.c
@@ -366,7 +366,7 @@ void __weak freq_inv_set_max_ratio(int cpu, u64 max_rate)
#ifdef CONFIG_ACPI_CPPC_LIB
#include <acpi/cppc_acpi.h>
-void topology_init_cpu_capacity_cppc(void)
+static inline void topology_init_cpu_capacity_cppc(void)
{
u64 capacity, capacity_scale = 0;
struct cppc_perf_caps perf_caps;
@@ -417,6 +417,10 @@ void topology_init_cpu_capacity_cppc(void)
exit:
free_raw_capacity();
}
+void acpi_processor_init_invariance_cppc(void)
+{
+ topology_init_cpu_capacity_cppc();
+}
#endif
#ifdef CONFIG_CPU_FREQ
diff --git a/drivers/base/core.c b/drivers/base/core.c
index a4c853411a6b..048ff98dbdfd 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -26,7 +26,6 @@
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/pm_runtime.h>
-#include <linux/rcupdate.h>
#include <linux/sched/mm.h>
#include <linux/sched/signal.h>
#include <linux/slab.h>
@@ -2634,7 +2633,6 @@ static const char *dev_uevent_name(const struct kobject *kobj)
static int dev_uevent(const struct kobject *kobj, struct kobj_uevent_env *env)
{
const struct device *dev = kobj_to_dev(kobj);
- struct device_driver *driver;
int retval = 0;
/* add device node properties if present */
@@ -2663,12 +2661,8 @@ static int dev_uevent(const struct kobject *kobj, struct kobj_uevent_env *env)
if (dev->type && dev->type->name)
add_uevent_var(env, "DEVTYPE=%s", dev->type->name);
- /* Synchronize with module_remove_driver() */
- rcu_read_lock();
- driver = READ_ONCE(dev->driver);
- if (driver)
- add_uevent_var(env, "DRIVER=%s", driver->name);
- rcu_read_unlock();
+ if (dev->driver)
+ add_uevent_var(env, "DRIVER=%s", dev->driver->name);
/* Add common DT information about the device */
of_device_uevent(dev, env);
@@ -2738,8 +2732,11 @@ static ssize_t uevent_show(struct device *dev, struct device_attribute *attr,
if (!env)
return -ENOMEM;
+ /* Synchronize with really_probe() */
+ device_lock(dev);
/* let the kset specific function add its keys */
retval = kset->uevent_ops->uevent(&dev->kobj, env);
+ device_unlock(dev);
if (retval)
goto out;
@@ -4038,6 +4035,41 @@ int device_for_each_child_reverse(struct device *parent, void *data,
EXPORT_SYMBOL_GPL(device_for_each_child_reverse);
/**
+ * device_for_each_child_reverse_from - device child iterator in reversed order.
+ * @parent: parent struct device.
+ * @from: optional starting point in child list
+ * @fn: function to be called for each device.
+ * @data: data for the callback.
+ *
+ * Iterate over @parent's child devices, starting at @from, and call @fn
+ * for each, passing it @data. This helper is identical to
+ * device_for_each_child_reverse() when @from is NULL.
+ *
+ * @fn is checked each iteration. If it returns anything other than 0,
+ * iteration stop and that value is returned to the caller of
+ * device_for_each_child_reverse_from();
+ */
+int device_for_each_child_reverse_from(struct device *parent,
+ struct device *from, const void *data,
+ int (*fn)(struct device *, const void *))
+{
+ struct klist_iter i;
+ struct device *child;
+ int error = 0;
+
+ if (!parent->p)
+ return 0;
+
+ klist_iter_init_node(&parent->p->klist_children, &i,
+ (from ? &from->p->knode_parent : NULL));
+ while ((child = prev_device(&i)) && !error)
+ error = fn(child, data);
+ klist_iter_exit(&i);
+ return error;
+}
+EXPORT_SYMBOL_GPL(device_for_each_child_reverse_from);
+
+/**
* device_find_child - device iterator for locating a particular device.
* @parent: parent struct device
* @match: Callback function to check device
diff --git a/drivers/base/module.c b/drivers/base/module.c
index c4eaa1158d54..5bc71bea883a 100644
--- a/drivers/base/module.c
+++ b/drivers/base/module.c
@@ -7,7 +7,6 @@
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/string.h>
-#include <linux/rcupdate.h>
#include "base.h"
static char *make_driver_name(const struct device_driver *drv)
@@ -102,9 +101,6 @@ void module_remove_driver(const struct device_driver *drv)
if (!drv)
return;
- /* Synchronize with dev_uevent() */
- synchronize_rcu();
-
sysfs_remove_link(&drv->p->kobj, "module");
if (drv->owner)
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index 83acccdc1008..bdb450436cbc 100644
--- a/drivers/base/regmap/internal.h
+++ b/drivers/base/regmap/internal.h
@@ -59,6 +59,7 @@ struct regmap {
unsigned long raw_spinlock_flags;
};
};
+ struct lock_class_key *lock_key;
regmap_lock lock;
regmap_unlock unlock;
void *lock_arg; /* This is passed to lock/unlock functions */
diff --git a/drivers/base/regmap/regcache-maple.c b/drivers/base/regmap/regcache-maple.c
index 8d27d3653ea3..23da7b31d715 100644
--- a/drivers/base/regmap/regcache-maple.c
+++ b/drivers/base/regmap/regcache-maple.c
@@ -355,6 +355,9 @@ static int regcache_maple_init(struct regmap *map)
mt_init(mt);
+ if (!mt_external_lock(mt) && map->lock_key)
+ lockdep_set_class_and_subclass(&mt->ma_lock, map->lock_key, 1);
+
if (!map->num_reg_defaults)
return 0;
diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index a750e48a26b8..0bcd81389a29 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -364,14 +364,11 @@ static irqreturn_t regmap_irq_thread(int irq, void *d)
memset32(data->status_buf, GENMASK(31, 0), chip->num_regs);
} else if (chip->num_main_regs) {
unsigned int max_main_bits;
- unsigned long size;
-
- size = chip->num_regs * sizeof(unsigned int);
max_main_bits = (chip->num_main_status_bits) ?
chip->num_main_status_bits : chip->num_regs;
/* Clear the status buf as we don't read all status regs */
- memset(data->status_buf, 0, size);
+ memset32(data->status_buf, 0, chip->num_regs);
/* We could support bulk read for main status registers
* but I don't expect to see devices with really many main
@@ -514,12 +511,16 @@ exit:
return IRQ_NONE;
}
+static struct lock_class_key regmap_irq_lock_class;
+static struct lock_class_key regmap_irq_request_class;
+
static int regmap_irq_map(struct irq_domain *h, unsigned int virq,
irq_hw_number_t hw)
{
struct regmap_irq_chip_data *data = h->host_data;
irq_set_chip_data(virq, data);
+ irq_set_lockdep_class(virq, &regmap_irq_lock_class, &regmap_irq_request_class);
irq_set_chip(virq, &data->irq_chip);
irq_set_nested_thread(virq, 1);
irq_set_parent(virq, data->irq);
diff --git a/drivers/base/regmap/regmap-kunit.c b/drivers/base/regmap/regmap-kunit.c
index 4bf3f1e59ed7..64ea340950b6 100644
--- a/drivers/base/regmap/regmap-kunit.c
+++ b/drivers/base/regmap/regmap-kunit.c
@@ -126,7 +126,7 @@ static const struct regmap_test_param real_cache_types_list[] = {
{ .cache = REGCACHE_RBTREE, .from_reg = 0x2003 },
{ .cache = REGCACHE_RBTREE, .from_reg = 0x2004 },
{ .cache = REGCACHE_MAPLE, .from_reg = 0 },
- { .cache = REGCACHE_RBTREE, .from_reg = 0, .fast_io = true },
+ { .cache = REGCACHE_MAPLE, .from_reg = 0, .fast_io = true },
{ .cache = REGCACHE_MAPLE, .from_reg = 0x2001 },
{ .cache = REGCACHE_MAPLE, .from_reg = 0x2002 },
{ .cache = REGCACHE_MAPLE, .from_reg = 0x2003 },
@@ -1499,6 +1499,48 @@ static void cache_present(struct kunit *test)
KUNIT_ASSERT_TRUE(test, regcache_reg_cached(map, param->from_reg + i));
}
+static void cache_write_zero(struct kunit *test)
+{
+ const struct regmap_test_param *param = test->param_value;
+ struct regmap *map;
+ struct regmap_config config;
+ struct regmap_ram_data *data;
+ unsigned int val;
+ int i;
+
+ config = test_regmap_config;
+
+ map = gen_regmap(test, &config, &data);
+ KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+ if (IS_ERR(map))
+ return;
+
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ data->read[param->from_reg + i] = false;
+
+ /* No defaults so no registers cached. */
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ KUNIT_ASSERT_FALSE(test, regcache_reg_cached(map, param->from_reg + i));
+
+ /* We didn't trigger any reads */
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ KUNIT_ASSERT_FALSE(test, data->read[param->from_reg + i]);
+
+ /* Write a zero value */
+ KUNIT_EXPECT_EQ(test, 0, regmap_write(map, 1, 0));
+
+ /* Read that zero value back */
+ KUNIT_EXPECT_EQ(test, 0, regmap_read(map, 1, &val));
+ KUNIT_EXPECT_EQ(test, 0, val);
+
+ /* From the cache? */
+ KUNIT_ASSERT_TRUE(test, regcache_reg_cached(map, 1));
+
+ /* Try to throw it away */
+ KUNIT_EXPECT_EQ(test, 0, regcache_drop_region(map, 1, 1));
+ KUNIT_ASSERT_FALSE(test, regcache_reg_cached(map, 1));
+}
+
/* Check that caching the window register works with sync */
static void cache_range_window_reg(struct kunit *test)
{
@@ -2012,6 +2054,7 @@ static struct kunit_case regmap_test_cases[] = {
KUNIT_CASE_PARAM(cache_drop_all_and_sync_no_defaults, sparse_cache_types_gen_params),
KUNIT_CASE_PARAM(cache_drop_all_and_sync_has_defaults, sparse_cache_types_gen_params),
KUNIT_CASE_PARAM(cache_present, sparse_cache_types_gen_params),
+ KUNIT_CASE_PARAM(cache_write_zero, sparse_cache_types_gen_params),
KUNIT_CASE_PARAM(cache_range_window_reg, real_cache_types_only_gen_params),
KUNIT_CASE_PARAM(raw_read_defaults_single, raw_test_types_gen_params),
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 4ded93687c1f..53131a7ede0a 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -745,6 +745,7 @@ struct regmap *__regmap_init(struct device *dev,
lock_key, lock_name);
}
map->lock_arg = map;
+ map->lock_key = lock_key;
}
/*
generated by cgit v1.2.3 (git 2.46.0) at 2025-12-09 09:49:54 +0000