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Diffstat (limited to 'kernel')
-rw-r--r--kernel/auditsc.c2
-rw-r--r--kernel/cpu.c8
-rw-r--r--kernel/ksysfs.c5
-rw-r--r--kernel/power/main.c2
-rw-r--r--kernel/power/qos.c65
-rw-r--r--kernel/power/swap.c2
-rw-r--r--kernel/printk.c12
-rw-r--r--kernel/sysctl.c4
-rw-r--r--kernel/time/tick-sched.c4
9 files changed, 90 insertions, 14 deletions
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 2f186ed80c40..fc7376bf86ea 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -1159,7 +1159,7 @@ void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk)
cred = current_cred();
spin_lock_irq(&tsk->sighand->siglock);
- if (tsk->signal && tsk->signal->tty && tsk->signal->tty->name)
+ if (tsk->signal && tsk->signal->tty)
tty = tsk->signal->tty->name;
else
tty = "(none)";
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 42bd331ee0ab..f45657f1eb8e 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -348,11 +348,13 @@ static int __cpuinit _cpu_up(unsigned int cpu, int tasks_frozen)
unsigned long mod = tasks_frozen ? CPU_TASKS_FROZEN : 0;
struct task_struct *idle;
- if (cpu_online(cpu) || !cpu_present(cpu))
- return -EINVAL;
-
cpu_hotplug_begin();
+ if (cpu_online(cpu) || !cpu_present(cpu)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
idle = idle_thread_get(cpu);
if (IS_ERR(idle)) {
ret = PTR_ERR(idle);
diff --git a/kernel/ksysfs.c b/kernel/ksysfs.c
index 4e316e1acf58..c01eac66c0cc 100644
--- a/kernel/ksysfs.c
+++ b/kernel/ksysfs.c
@@ -26,7 +26,6 @@ static struct kobj_attribute _name##_attr = __ATTR_RO(_name)
static struct kobj_attribute _name##_attr = \
__ATTR(_name, 0644, _name##_show, _name##_store)
-#if defined(CONFIG_HOTPLUG)
/* current uevent sequence number */
static ssize_t uevent_seqnum_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
@@ -54,7 +53,7 @@ static ssize_t uevent_helper_store(struct kobject *kobj,
return count;
}
KERNEL_ATTR_RW(uevent_helper);
-#endif
+
#ifdef CONFIG_PROFILING
static ssize_t profiling_show(struct kobject *kobj,
@@ -169,10 +168,8 @@ EXPORT_SYMBOL_GPL(kernel_kobj);
static struct attribute * kernel_attrs[] = {
&fscaps_attr.attr,
-#if defined(CONFIG_HOTPLUG)
&uevent_seqnum_attr.attr,
&uevent_helper_attr.attr,
-#endif
#ifdef CONFIG_PROFILING
&profiling_attr.attr,
#endif
diff --git a/kernel/power/main.c b/kernel/power/main.c
index f458238109cc..1c16f9167de1 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -59,7 +59,7 @@ static ssize_t pm_async_store(struct kobject *kobj, struct kobj_attribute *attr,
{
unsigned long val;
- if (strict_strtoul(buf, 10, &val))
+ if (kstrtoul(buf, 10, &val))
return -EINVAL;
if (val > 1)
diff --git a/kernel/power/qos.c b/kernel/power/qos.c
index 846bd42c7ed1..9322ff7eaad6 100644
--- a/kernel/power/qos.c
+++ b/kernel/power/qos.c
@@ -213,6 +213,69 @@ int pm_qos_update_target(struct pm_qos_constraints *c, struct plist_node *node,
}
/**
+ * pm_qos_flags_remove_req - Remove device PM QoS flags request.
+ * @pqf: Device PM QoS flags set to remove the request from.
+ * @req: Request to remove from the set.
+ */
+static void pm_qos_flags_remove_req(struct pm_qos_flags *pqf,
+ struct pm_qos_flags_request *req)
+{
+ s32 val = 0;
+
+ list_del(&req->node);
+ list_for_each_entry(req, &pqf->list, node)
+ val |= req->flags;
+
+ pqf->effective_flags = val;
+}
+
+/**
+ * pm_qos_update_flags - Update a set of PM QoS flags.
+ * @pqf: Set of flags to update.
+ * @req: Request to add to the set, to modify, or to remove from the set.
+ * @action: Action to take on the set.
+ * @val: Value of the request to add or modify.
+ *
+ * Update the given set of PM QoS flags and call notifiers if the aggregate
+ * value has changed. Returns 1 if the aggregate constraint value has changed,
+ * 0 otherwise.
+ */
+bool pm_qos_update_flags(struct pm_qos_flags *pqf,
+ struct pm_qos_flags_request *req,
+ enum pm_qos_req_action action, s32 val)
+{
+ unsigned long irqflags;
+ s32 prev_value, curr_value;
+
+ spin_lock_irqsave(&pm_qos_lock, irqflags);
+
+ prev_value = list_empty(&pqf->list) ? 0 : pqf->effective_flags;
+
+ switch (action) {
+ case PM_QOS_REMOVE_REQ:
+ pm_qos_flags_remove_req(pqf, req);
+ break;
+ case PM_QOS_UPDATE_REQ:
+ pm_qos_flags_remove_req(pqf, req);
+ case PM_QOS_ADD_REQ:
+ req->flags = val;
+ INIT_LIST_HEAD(&req->node);
+ list_add_tail(&req->node, &pqf->list);
+ pqf->effective_flags |= val;
+ break;
+ default:
+ /* no action */
+ ;
+ }
+
+ curr_value = list_empty(&pqf->list) ? 0 : pqf->effective_flags;
+
+ spin_unlock_irqrestore(&pm_qos_lock, irqflags);
+
+ return prev_value != curr_value;
+}
+
+/**
* pm_qos_request - returns current system wide qos expectation
* @pm_qos_class: identification of which qos value is requested
*
@@ -500,7 +563,7 @@ static ssize_t pm_qos_power_write(struct file *filp, const char __user *buf,
} else {
ascii_value[count] = '\0';
}
- ret = strict_strtoul(ascii_value, 16, &ulval);
+ ret = kstrtoul(ascii_value, 16, &ulval);
if (ret) {
pr_debug("%s, 0x%lx, 0x%x\n", ascii_value, ulval, ret);
return -EINVAL;
diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index 3c9d764eb0d8..7c33ed200410 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -126,7 +126,7 @@ static int swsusp_extents_insert(unsigned long swap_offset)
/* Figure out where to put the new node */
while (*new) {
- ext = container_of(*new, struct swsusp_extent, node);
+ ext = rb_entry(*new, struct swsusp_extent, node);
parent = *new;
if (swap_offset < ext->start) {
/* Try to merge */
diff --git a/kernel/printk.c b/kernel/printk.c
index 2d607f4d1797..22e070f3470a 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -87,6 +87,12 @@ static DEFINE_SEMAPHORE(console_sem);
struct console *console_drivers;
EXPORT_SYMBOL_GPL(console_drivers);
+#ifdef CONFIG_LOCKDEP
+static struct lockdep_map console_lock_dep_map = {
+ .name = "console_lock"
+};
+#endif
+
/*
* This is used for debugging the mess that is the VT code by
* keeping track if we have the console semaphore held. It's
@@ -1908,12 +1914,14 @@ static int __cpuinit console_cpu_notify(struct notifier_block *self,
*/
void console_lock(void)
{
- BUG_ON(in_interrupt());
+ might_sleep();
+
down(&console_sem);
if (console_suspended)
return;
console_locked = 1;
console_may_schedule = 1;
+ mutex_acquire(&console_lock_dep_map, 0, 0, _RET_IP_);
}
EXPORT_SYMBOL(console_lock);
@@ -1935,6 +1943,7 @@ int console_trylock(void)
}
console_locked = 1;
console_may_schedule = 0;
+ mutex_acquire(&console_lock_dep_map, 0, 1, _RET_IP_);
return 1;
}
EXPORT_SYMBOL(console_trylock);
@@ -2095,6 +2104,7 @@ skip:
local_irq_restore(flags);
}
console_locked = 0;
+ mutex_release(&console_lock_dep_map, 1, _RET_IP_);
/* Release the exclusive_console once it is used */
if (unlikely(exclusive_console))
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 26f65eaa01f9..33f71f37267e 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -565,7 +565,7 @@ static struct ctl_table kern_table[] = {
.extra2 = &one,
},
#endif
-#ifdef CONFIG_HOTPLUG
+
{
.procname = "hotplug",
.data = &uevent_helper,
@@ -573,7 +573,7 @@ static struct ctl_table kern_table[] = {
.mode = 0644,
.proc_handler = proc_dostring,
},
-#endif
+
#ifdef CONFIG_CHR_DEV_SG
{
.procname = "sg-big-buff",
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index a40260885265..6f337068dc4c 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -526,6 +526,8 @@ void tick_nohz_irq_exit(void)
if (!ts->inidle)
return;
+ /* Cancel the timer because CPU already waken up from the C-states*/
+ menu_hrtimer_cancel();
__tick_nohz_idle_enter(ts);
}
@@ -621,6 +623,8 @@ void tick_nohz_idle_exit(void)
ts->inidle = 0;
+ /* Cancel the timer because CPU already waken up from the C-states*/
+ menu_hrtimer_cancel();
if (ts->idle_active || ts->tick_stopped)
now = ktime_get();
generated by cgit (git 2.34.1) at 2025-06-06 00:16:22 +0000