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authorIan Wisbon <ian.wisbon@timesys.com>2011-02-10 17:15:15 -0500
committerIan Wisbon <ian.wisbon@timesys.com>2011-02-10 17:15:15 -0500
commita9d2ba1444b0af6c2d8534f0b306660ffc045bc6 (patch)
tree79b396bf70ae3795e6ee9a3b645e64f7e29474e7 /kernel
parenteffff5718c380983788fe6c380671c18e15ac7c2 (diff)
Linux 2.6.31 Release for Digi ConnectCore Wi-i.MX boards2.6.31-digi-201102101717
Diffstat (limited to 'kernel')
-rw-r--r--kernel/fork.c16
-rw-r--r--kernel/irq/handle.c4
-rw-r--r--kernel/power/Kconfig67
-rw-r--r--kernel/power/Makefile5
-rw-r--r--kernel/power/main.c20
-rw-r--r--kernel/power/power.h24
-rw-r--r--kernel/power/process.c25
-rw-r--r--kernel/power/suspend.c3
8 files changed, 156 insertions, 8 deletions
diff --git a/kernel/fork.c b/kernel/fork.c
index e6c04d462ab2..4c21988d6195 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -136,6 +136,9 @@ struct kmem_cache *vm_area_cachep;
/* SLAB cache for mm_struct structures (tsk->mm) */
static struct kmem_cache *mm_cachep;
+/* Notifier list called when a task struct is freed */
+static ATOMIC_NOTIFIER_HEAD(task_free_notifier);
+
void free_task(struct task_struct *tsk)
{
prop_local_destroy_single(&tsk->dirties);
@@ -146,6 +149,18 @@ void free_task(struct task_struct *tsk)
}
EXPORT_SYMBOL(free_task);
+int task_free_register(struct notifier_block *n)
+{
+ return atomic_notifier_chain_register(&task_free_notifier, n);
+}
+EXPORT_SYMBOL(task_free_register);
+
+int task_free_unregister(struct notifier_block *n)
+{
+ return atomic_notifier_chain_unregister(&task_free_notifier, n);
+}
+EXPORT_SYMBOL(task_free_unregister);
+
void __put_task_struct(struct task_struct *tsk)
{
WARN_ON(!tsk->exit_state);
@@ -156,6 +171,7 @@ void __put_task_struct(struct task_struct *tsk)
put_cred(tsk->cred);
delayacct_tsk_free(tsk);
+ atomic_notifier_call_chain(&task_free_notifier, 0, tsk);
if (!profile_handoff_task(tsk))
free_task(tsk);
}
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 065205bdd920..e8108a1a0eaf 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -274,6 +274,7 @@ struct irq_desc *irq_to_desc(unsigned int irq)
{
return (irq < NR_IRQS) ? irq_desc + irq : NULL;
}
+EXPORT_SYMBOL(irq_to_desc);
struct irq_desc *irq_to_desc_alloc_node(unsigned int irq, int node)
{
@@ -368,9 +369,6 @@ irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action)
irqreturn_t ret, retval = IRQ_NONE;
unsigned int status = 0;
- if (!(action->flags & IRQF_DISABLED))
- local_irq_enable_in_hardirq();
-
do {
trace_irq_handler_entry(irq, action);
ret = action->handler(irq, action->dev_id);
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index 72067cbdb37f..bd007aa74549 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -119,6 +119,73 @@ config SUSPEND_FREEZER
config HIBERNATION_NVS
bool
+config HAS_WAKELOCK
+ bool
+
+config HAS_EARLYSUSPEND
+ bool
+
+config WAKELOCK
+ bool "Wake lock"
+ depends on PM && RTC_CLASS
+ default n
+ select HAS_WAKELOCK
+ ---help---
+ Enable wakelocks. When user space request a sleep state the
+ sleep request will be delayed until no wake locks are held.
+
+config WAKELOCK_STAT
+ bool "Wake lock stats"
+ depends on WAKELOCK
+ default y
+ ---help---
+ Report wake lock stats in /proc/wakelocks
+
+config USER_WAKELOCK
+ bool "Userspace wake locks"
+ depends on WAKELOCK
+ default y
+ ---help---
+ User-space wake lock api. Write "lockname" or "lockname timeout"
+ to /sys/power/wake_lock lock and if needed create a wake lock.
+ Write "lockname" to /sys/power/wake_unlock to unlock a user wake
+ lock.
+
+config EARLYSUSPEND
+ bool "Early suspend"
+ depends on WAKELOCK
+ default y
+ select HAS_EARLYSUSPEND
+ ---help---
+ Call early suspend handlers when the user requested sleep state
+ changes.
+
+choice
+ prompt "User-space screen access"
+ default FB_EARLYSUSPEND if !FRAMEBUFFER_CONSOLE
+ default CONSOLE_EARLYSUSPEND
+ depends on HAS_EARLYSUSPEND
+
+ config NO_USER_SPACE_SCREEN_ACCESS_CONTROL
+ bool "None"
+
+ config CONSOLE_EARLYSUSPEND
+ bool "Console switch on early-suspend"
+ depends on HAS_EARLYSUSPEND && VT
+ ---help---
+ Register early suspend handler to perform a console switch to
+ when user-space should stop drawing to the screen and a switch
+ back when it should resume.
+
+ config FB_EARLYSUSPEND
+ bool "Sysfs interface"
+ depends on HAS_EARLYSUSPEND
+ ---help---
+ Register early suspend handler that notifies and waits for
+ user-space through sysfs when user-space should stop drawing
+ to the screen and notifies user-space when it should resume.
+endchoice
+
config HIBERNATION
bool "Hibernation (aka 'suspend to disk')"
depends on PM && SWAP && ARCH_HIBERNATION_POSSIBLE
diff --git a/kernel/power/Makefile b/kernel/power/Makefile
index c3b81c30e5d5..058ec85a98bd 100644
--- a/kernel/power/Makefile
+++ b/kernel/power/Makefile
@@ -12,3 +12,8 @@ obj-$(CONFIG_HIBERNATION) += swsusp.o hibernate.o snapshot.o swap.o user.o
obj-$(CONFIG_HIBERNATION_NVS) += hibernate_nvs.o
obj-$(CONFIG_MAGIC_SYSRQ) += poweroff.o
+obj-$(CONFIG_WAKELOCK) += wakelock.o
+obj-$(CONFIG_USER_WAKELOCK) += userwakelock.o
+obj-$(CONFIG_EARLYSUSPEND) += earlysuspend.o
+obj-$(CONFIG_CONSOLE_EARLYSUSPEND) += consoleearlysuspend.o
+obj-$(CONFIG_FB_EARLYSUSPEND) += fbearlysuspend.o
diff --git a/kernel/power/main.c b/kernel/power/main.c
index f710e36930cc..ef94a083302f 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -146,7 +146,11 @@ static ssize_t state_store(struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t n)
{
#ifdef CONFIG_SUSPEND
+#ifdef CONFIG_EARLYSUSPEND
+ suspend_state_t state = PM_SUSPEND_ON;
+#else
suspend_state_t state = PM_SUSPEND_STANDBY;
+#endif
const char * const *s;
#endif
char *p;
@@ -168,8 +172,15 @@ static ssize_t state_store(struct kobject *kobj, struct kobj_attribute *attr,
break;
}
if (state < PM_SUSPEND_MAX && *s)
+#ifdef CONFIG_EARLYSUSPEND
+ if (state == PM_SUSPEND_ON || valid_state(state)) {
+ error = 0;
+ request_suspend_state(state);
+ }
+#else
error = enter_state(state);
#endif
+#endif
Exit:
return error ? error : n;
@@ -202,6 +213,11 @@ pm_trace_store(struct kobject *kobj, struct kobj_attribute *attr,
power_attr(pm_trace);
#endif /* CONFIG_PM_TRACE */
+#ifdef CONFIG_USER_WAKELOCK
+power_attr(wake_lock);
+power_attr(wake_unlock);
+#endif
+
static struct attribute * g[] = {
&state_attr.attr,
#ifdef CONFIG_PM_TRACE
@@ -210,6 +226,10 @@ static struct attribute * g[] = {
#if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PM_DEBUG)
&pm_test_attr.attr,
#endif
+#ifdef CONFIG_USER_WAKELOCK
+ &wake_lock_attr.attr,
+ &wake_unlock_attr.attr,
+#endif
NULL,
};
diff --git a/kernel/power/power.h b/kernel/power/power.h
index 26d5a26f82e3..a665c1e4e597 100644
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -236,3 +236,27 @@ static inline void suspend_thaw_processes(void)
{
}
#endif
+
+#ifdef CONFIG_WAKELOCK
+/* kernel/power/wakelock.c */
+extern struct workqueue_struct *suspend_work_queue;
+extern struct wake_lock main_wake_lock;
+extern suspend_state_t requested_suspend_state;
+#endif
+
+#ifdef CONFIG_USER_WAKELOCK
+ssize_t wake_lock_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf);
+ssize_t wake_lock_store(struct kobject *kobj, struct kobj_attribute *attr,
+ const char *buf, size_t n);
+ssize_t wake_unlock_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf);
+ssize_t wake_unlock_store(struct kobject *kobj, struct kobj_attribute *attr,
+ const char *buf, size_t n);
+#endif
+
+#ifdef CONFIG_EARLYSUSPEND
+/* kernel/power/earlysuspend.c */
+void request_suspend_state(suspend_state_t state);
+suspend_state_t get_suspend_state(void);
+#endif
diff --git a/kernel/power/process.c b/kernel/power/process.c
index da2072d73811..d366c35f8ba0 100644
--- a/kernel/power/process.c
+++ b/kernel/power/process.c
@@ -13,6 +13,7 @@
#include <linux/module.h>
#include <linux/syscalls.h>
#include <linux/freezer.h>
+#include <linux/wakelock.h>
/*
* Timeout for stopping processes
@@ -36,6 +37,7 @@ static int try_to_freeze_tasks(bool sig_only)
struct timeval start, end;
u64 elapsed_csecs64;
unsigned int elapsed_csecs;
+ unsigned int wakeup = 0;
do_gettimeofday(&start);
@@ -62,6 +64,12 @@ static int try_to_freeze_tasks(bool sig_only)
} while_each_thread(g, p);
read_unlock(&tasklist_lock);
yield(); /* Yield is okay here */
+#ifdef CONFIG_WAKELOCK
+ if (todo && has_wake_lock(WAKE_LOCK_SUSPEND)) {
+ wakeup = 1;
+ break;
+ }
+#endif
if (time_after(jiffies, end_time))
break;
} while (todo);
@@ -77,11 +85,18 @@ static int try_to_freeze_tasks(bool sig_only)
* and caller must call thaw_processes() if something fails),
* but it cleans up leftover PF_FREEZE requests.
*/
- printk("\n");
- printk(KERN_ERR "Freezing of tasks failed after %d.%02d seconds "
- "(%d tasks refusing to freeze):\n",
- elapsed_csecs / 100, elapsed_csecs % 100, todo);
- show_state();
+ if(wakeup) {
+ printk("\n");
+ printk(KERN_ERR "Freezing of %s aborted\n",
+ sig_only ? "user space " : "tasks ");
+ }
+ else {
+ printk("\n");
+ printk(KERN_ERR "Freezing of tasks failed after %d.%02d seconds "
+ "(%d tasks refusing to freeze):\n",
+ elapsed_csecs / 100, elapsed_csecs % 100, todo);
+ show_state();
+ }
read_lock(&tasklist_lock);
do_each_thread(g, p) {
task_lock(p);
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index 6f10dfc2d3e9..cd515ba1c8ce 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -19,6 +19,9 @@
#include "power.h"
const char *const pm_states[PM_SUSPEND_MAX] = {
+#ifdef CONFIG_EARLYSUSPEND
+ [PM_SUSPEND_ON] = "on",
+#endif
[PM_SUSPEND_STANDBY] = "standby",
[PM_SUSPEND_MEM] = "mem",
};