aboutsummaryrefslogtreecommitdiff
path: root/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'kernel')
-rw-r--r--kernel/hrtimer.c24
-rw-r--r--kernel/irq/migration.c9
-rw-r--r--kernel/kmod.c120
-rw-r--r--kernel/lockdep.c2
-rw-r--r--kernel/module.c32
-rw-r--r--kernel/params.c1
-rw-r--r--kernel/power/Kconfig37
-rw-r--r--kernel/power/main.c5
-rw-r--r--kernel/rcutorture.c14
-rw-r--r--kernel/relay.c3
-rw-r--r--kernel/sched.c157
-rw-r--r--kernel/signal.c3
-rw-r--r--kernel/sysctl.c6
-rw-r--r--kernel/time/clocksource.c8
-rw-r--r--kernel/time/tick-broadcast.c36
-rw-r--r--kernel/time/tick-common.c37
-rw-r--r--kernel/time/tick-internal.h4
-rw-r--r--kernel/time/tick-sched.c2
-rw-r--r--kernel/timer.c19
19 files changed, 171 insertions, 348 deletions
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 476cb0c0b4a..ec4cb9f3e3b 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -540,19 +540,19 @@ static inline int hrtimer_enqueue_reprogram(struct hrtimer *timer,
/*
* Switch to high resolution mode
*/
-static void hrtimer_switch_to_hres(void)
+static int hrtimer_switch_to_hres(void)
{
struct hrtimer_cpu_base *base = &__get_cpu_var(hrtimer_bases);
unsigned long flags;
if (base->hres_active)
- return;
+ return 1;
local_irq_save(flags);
if (tick_init_highres()) {
local_irq_restore(flags);
- return;
+ return 0;
}
base->hres_active = 1;
base->clock_base[CLOCK_REALTIME].resolution = KTIME_HIGH_RES;
@@ -565,13 +565,14 @@ static void hrtimer_switch_to_hres(void)
local_irq_restore(flags);
printk(KERN_INFO "Switched to high resolution mode on CPU %d\n",
smp_processor_id());
+ return 1;
}
#else
static inline int hrtimer_hres_active(void) { return 0; }
static inline int hrtimer_is_hres_enabled(void) { return 0; }
-static inline void hrtimer_switch_to_hres(void) { }
+static inline int hrtimer_switch_to_hres(void) { return 0; }
static inline void hrtimer_force_reprogram(struct hrtimer_cpu_base *base) { }
static inline int hrtimer_enqueue_reprogram(struct hrtimer *timer,
struct hrtimer_clock_base *base)
@@ -1130,6 +1131,9 @@ static inline void run_hrtimer_queue(struct hrtimer_cpu_base *cpu_base,
if (base->softirq_time.tv64 <= timer->expires.tv64)
break;
+#ifdef CONFIG_HIGH_RES_TIMERS
+ WARN_ON_ONCE(timer->cb_mode == HRTIMER_CB_IRQSAFE_NO_SOFTIRQ);
+#endif
timer_stats_account_hrtimer(timer);
fn = timer->function;
@@ -1173,7 +1177,8 @@ void hrtimer_run_queues(void)
* deadlock vs. xtime_lock.
*/
if (tick_check_oneshot_change(!hrtimer_is_hres_enabled()))
- hrtimer_switch_to_hres();
+ if (hrtimer_switch_to_hres())
+ return;
hrtimer_get_softirq_time(cpu_base);
@@ -1355,17 +1360,16 @@ static void migrate_hrtimers(int cpu)
tick_cancel_sched_timer(cpu);
local_irq_disable();
-
- spin_lock(&new_base->lock);
- spin_lock(&old_base->lock);
+ double_spin_lock(&new_base->lock, &old_base->lock,
+ smp_processor_id() < cpu);
for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++) {
migrate_hrtimer_list(&old_base->clock_base[i],
&new_base->clock_base[i]);
}
- spin_unlock(&old_base->lock);
- spin_unlock(&new_base->lock);
+ double_spin_unlock(&new_base->lock, &old_base->lock,
+ smp_processor_id() < cpu);
local_irq_enable();
put_cpu_var(hrtimer_bases);
}
diff --git a/kernel/irq/migration.c b/kernel/irq/migration.c
index 4baa3bbcd25..77b7acc875c 100644
--- a/kernel/irq/migration.c
+++ b/kernel/irq/migration.c
@@ -65,12 +65,11 @@ void move_native_irq(int irq)
if (likely(!(desc->status & IRQ_MOVE_PENDING)))
return;
- if (likely(!(desc->status & IRQ_DISABLED)))
- desc->chip->disable(irq);
+ if (unlikely(desc->status & IRQ_DISABLED))
+ return;
+ desc->chip->mask(irq);
move_masked_irq(irq);
-
- if (likely(!(desc->status & IRQ_DISABLED)))
- desc->chip->enable(irq);
+ desc->chip->unmask(irq);
}
diff --git a/kernel/kmod.c b/kernel/kmod.c
index 9f923f8ce6a..796276141e5 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -36,8 +36,6 @@
#include <linux/resource.h>
#include <asm/uaccess.h>
-extern int delete_module(const char *name, unsigned int flags);
-
extern int max_threads;
static struct workqueue_struct *khelper_wq;
@@ -48,7 +46,6 @@ static struct workqueue_struct *khelper_wq;
modprobe_path is set via /proc/sys.
*/
char modprobe_path[KMOD_PATH_LEN] = "/sbin/modprobe";
-struct module_kobject kmod_mk;
/**
* request_module - try to load a kernel module
@@ -78,11 +75,6 @@ int request_module(const char *fmt, ...)
static atomic_t kmod_concurrent = ATOMIC_INIT(0);
#define MAX_KMOD_CONCURRENT 50 /* Completely arbitrary value - KAO */
static int kmod_loop_msg;
- char modalias[16 + MODULE_NAME_LEN] = "MODALIAS=";
- char *uevent_envp[2] = {
- modalias,
- NULL
- };
va_start(args, fmt);
ret = vsnprintf(module_name, MODULE_NAME_LEN, fmt, args);
@@ -90,12 +82,6 @@ int request_module(const char *fmt, ...)
if (ret >= MODULE_NAME_LEN)
return -ENAMETOOLONG;
- strcpy(&modalias[strlen("MODALIAS=")], module_name);
- kobject_uevent_env(&kmod_mk.kobj, KOBJ_CHANGE, uevent_envp);
-
- if (modprobe_path[0] == '\0')
- goto out;
-
/* If modprobe needs a service that is in a module, we get a recursive
* loop. Limit the number of running kmod threads to max_threads/2 or
* MAX_KMOD_CONCURRENT, whichever is the smaller. A cleaner method
@@ -122,115 +108,9 @@ int request_module(const char *fmt, ...)
ret = call_usermodehelper(modprobe_path, argv, envp, 1);
atomic_dec(&kmod_concurrent);
-out:
return ret;
}
EXPORT_SYMBOL(request_module);
-
-static ssize_t store_mod_request(struct module_attribute *mattr,
- struct module *mod,
- const char *buffer, size_t count)
-{
- char name[MODULE_NAME_LEN];
- int ret;
-
- if (count < 1 || count+1 > MODULE_NAME_LEN)
- return -EINVAL;
- memcpy(name, buffer, count);
- name[count] = '\0';
- if (name[count-1] == '\n')
- name[count-1] = '\0';
-
- ret = request_module(name);
- if (ret < 0)
- return ret;
- return count;
-}
-
-static struct module_attribute mod_request = {
- .attr = { .name = "mod_request", .mode = S_IWUSR, .owner = THIS_MODULE },
- .store = store_mod_request,
-};
-
-#ifdef CONFIG_MODULE_UNLOAD
-static ssize_t store_mod_unload(struct module_attribute *mattr,
- struct module *mod,
- const char *buffer, size_t count)
-{
- char name[MODULE_NAME_LEN];
- int ret;
-
- if (count < 1 || count+1 > MODULE_NAME_LEN)
- return -EINVAL;
- memcpy(name, buffer, count);
- name[count] = '\0';
- if (name[count-1] == '\n')
- name[count-1] = '\0';
-
- ret = delete_module(name, O_NONBLOCK);
- if (ret < 0)
- return ret;
- return count;
-}
-
-static struct module_attribute mod_unload = {
- .attr = { .name = "mod_unload", .mode = S_IWUSR, .owner = THIS_MODULE },
- .store = store_mod_unload,
-};
-#endif
-
-static ssize_t show_mod_request_helper(struct module_attribute *mattr,
- struct module *mod,
- char *buffer)
-{
- return sprintf(buffer, "%s\n", modprobe_path);
-}
-
-static ssize_t store_mod_request_helper(struct module_attribute *mattr,
- struct module *mod,
- const char *buffer, size_t count)
-{
- if (count < 1 || count+1 > KMOD_PATH_LEN)
- return -EINVAL;
- memcpy(modprobe_path, buffer, count);
- modprobe_path[count] = '\0';
- if (modprobe_path[count-1] == '\n')
- modprobe_path[count-1] = '\0';
- return count;
-}
-
-static struct module_attribute mod_request_helper = {
- .attr = {
- .name = "mod_request_helper",
- .mode = S_IWUSR | S_IRUGO,
- .owner = THIS_MODULE
- },
- .show = show_mod_request_helper,
- .store = store_mod_request_helper,
-};
-
-void __init kmod_sysfs_init(void)
-{
- int ret;
-
- kmod_mk.mod = THIS_MODULE;
- kobj_set_kset_s(&kmod_mk, module_subsys);
- kobject_set_name(&kmod_mk.kobj, "kmod");
- kobject_init(&kmod_mk.kobj);
- ret = kobject_add(&kmod_mk.kobj);
- if (ret < 0)
- goto out;
-
- ret = sysfs_create_file(&kmod_mk.kobj, &mod_request_helper.attr);
- ret = sysfs_create_file(&kmod_mk.kobj, &mod_request.attr);
-#ifdef CONFIG_MODULE_UNLOAD
- ret = sysfs_create_file(&kmod_mk.kobj, &mod_unload.attr);
-#endif
-
- kobject_uevent(&kmod_mk.kobj, KOBJ_ADD);
-out:
- return;
-}
#endif /* CONFIG_KMOD */
struct subprocess_info {
diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index a08a17218df..8dc24c92dc6 100644
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -2602,7 +2602,7 @@ out_restore:
raw_local_irq_restore(flags);
}
-void __init lockdep_init(void)
+void lockdep_init(void)
{
int i;
diff --git a/kernel/module.c b/kernel/module.c
index 8c25b1a04fa..f77e893e462 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -653,11 +653,20 @@ static void wait_for_zero_refcount(struct module *mod)
mutex_lock(&module_mutex);
}
-int delete_module(const char *name, unsigned int flags)
+asmlinkage long
+sys_delete_module(const char __user *name_user, unsigned int flags)
{
struct module *mod;
+ char name[MODULE_NAME_LEN];
int ret, forced = 0;
+ if (!capable(CAP_SYS_MODULE))
+ return -EPERM;
+
+ if (strncpy_from_user(name, name_user, MODULE_NAME_LEN-1) < 0)
+ return -EFAULT;
+ name[MODULE_NAME_LEN-1] = '\0';
+
if (mutex_lock_interruptible(&module_mutex) != 0)
return -EINTR;
@@ -718,21 +727,6 @@ int delete_module(const char *name, unsigned int flags)
return ret;
}
-asmlinkage long
-sys_delete_module(const char __user *name_user, unsigned int flags)
-{
- char name[MODULE_NAME_LEN];
-
- if (!capable(CAP_SYS_MODULE))
- return -EPERM;
-
- if (strncpy_from_user(name, name_user, MODULE_NAME_LEN-1) < 0)
- return -EFAULT;
- name[MODULE_NAME_LEN-1] = '\0';
-
- return delete_module(name, flags);
-}
-
static void print_unload_info(struct seq_file *m, struct module *mod)
{
struct module_use *use;
@@ -2425,6 +2419,12 @@ void module_remove_driver(struct device_driver *drv)
kfree(driver_name);
}
}
+ /*
+ * Undo the additional reference we added in module_add_driver()
+ * via kset_find_obj()
+ */
+ if (drv->mod_name)
+ kobject_put(&drv->kobj);
}
EXPORT_SYMBOL(module_remove_driver);
#endif
diff --git a/kernel/params.c b/kernel/params.c
index 7a751570b56..e265b13195b 100644
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -707,7 +707,6 @@ static int __init param_sysfs_init(void)
}
param_sysfs_builtin();
- kmod_sysfs_init();
return 0;
}
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index 95f6657fff7..51a4dd0f1b7 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -81,29 +81,34 @@ config SOFTWARE_SUSPEND
bool "Software Suspend"
depends on PM && SWAP && ((X86 && (!SMP || SUSPEND_SMP)) || ((FRV || PPC32) && !SMP))
---help---
- Enable the possibility of suspending the machine.
- It doesn't need ACPI or APM.
- You may suspend your machine by 'swsusp' or 'shutdown -z <time>'
- (patch for sysvinit needed).
+ Enable the suspend to disk (STD) functionality.
- It creates an image which is saved in your active swap. Upon next
+ You can suspend your machine with 'echo disk > /sys/power/state'.
+ Alternatively, you can use the additional userland tools available
+ from <http://suspend.sf.net>.
+
+ In principle it does not require ACPI or APM, although for example
+ ACPI will be used if available.
+
+ It creates an image which is saved in your active swap. Upon the next
boot, pass the 'resume=/dev/swappartition' argument to the kernel to
have it detect the saved image, restore memory state from it, and
continue to run as before. If you do not want the previous state to
- be reloaded, then use the 'noresume' kernel argument. However, note
- that your partitions will be fsck'd and you must re-mkswap your swap
- partitions. It does not work with swap files.
+ be reloaded, then use the 'noresume' kernel command line argument.
+ Note, however, that fsck will be run on your filesystems and you will
+ need to run mkswap against the swap partition used for the suspend.
- Right now you may boot without resuming and then later resume but
- in meantime you cannot use those swap partitions/files which were
- involved in suspending. Also in this case there is a risk that buffers
- on disk won't match with saved ones.
+ It also works with swap files to a limited extent (for details see
+ <file:Documentation/power/swsusp-and-swap-files.txt>).
- For more information take a look at <file:Documentation/power/swsusp.txt>.
+ Right now you may boot without resuming and resume later but in the
+ meantime you cannot use the swap partition(s)/file(s) involved in
+ suspending. Also in this case you must not use the filesystems
+ that were mounted before the suspend. In particular, you MUST NOT
+ MOUNT any journaled filesystems mounted before the suspend or they
+ will get corrupted in a nasty way.
- (For now, swsusp is incompatible with PAE aka HIGHMEM_64G on i386.
- we need identity mapping for resume to work, and that is trivial
- to get with 4MB pages, but less than trivial on PAE).
+ For more information take a look at <file:Documentation/power/swsusp.txt>.
config PM_STD_PARTITION
string "Default resume partition"
diff --git a/kernel/power/main.c b/kernel/power/main.c
index e1c41312046..a064dfd8877 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -167,7 +167,10 @@ static inline int valid_state(suspend_state_t state)
if (state == PM_SUSPEND_DISK)
return 1;
- if (pm_ops && pm_ops->valid && !pm_ops->valid(state))
+ /* all other states need lowlevel support and need to be
+ * valid to the lowlevel implementation, no valid callback
+ * implies that all are valid. */
+ if (!pm_ops || (pm_ops->valid && !pm_ops->valid(state)))
return 0;
return 1;
}
diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
index 482b11ff65c..bcd14e83ef3 100644
--- a/kernel/rcutorture.c
+++ b/kernel/rcutorture.c
@@ -60,19 +60,19 @@ static int test_no_idle_hz; /* Test RCU's support for tickless idle CPUs. */
static int shuffle_interval = 5; /* Interval between shuffles (in sec)*/
static char *torture_type = "rcu"; /* What RCU implementation to torture. */
-module_param(nreaders, int, 0);
+module_param(nreaders, int, 0444);
MODULE_PARM_DESC(nreaders, "Number of RCU reader threads");
-module_param(nfakewriters, int, 0);
+module_param(nfakewriters, int, 0444);
MODULE_PARM_DESC(nfakewriters, "Number of RCU fake writer threads");
-module_param(stat_interval, int, 0);
+module_param(stat_interval, int, 0444);
MODULE_PARM_DESC(stat_interval, "Number of seconds between stats printk()s");
-module_param(verbose, bool, 0);
+module_param(verbose, bool, 0444);
MODULE_PARM_DESC(verbose, "Enable verbose debugging printk()s");
-module_param(test_no_idle_hz, bool, 0);
+module_param(test_no_idle_hz, bool, 0444);
MODULE_PARM_DESC(test_no_idle_hz, "Test support for tickless idle CPUs");
-module_param(shuffle_interval, int, 0);
+module_param(shuffle_interval, int, 0444);
MODULE_PARM_DESC(shuffle_interval, "Number of seconds between shuffles");
-module_param(torture_type, charp, 0);
+module_param(torture_type, charp, 0444);
MODULE_PARM_DESC(torture_type, "Type of RCU to torture (rcu, rcu_bh, srcu)");
#define TORTURE_FLAG "-torture:"
diff --git a/kernel/relay.c b/kernel/relay.c
index ef8a935710a..577f251c7e2 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -474,13 +474,12 @@ static void setup_callbacks(struct rchan *chan,
}
/**
- *
* relay_hotcpu_callback - CPU hotplug callback
* @nb: notifier block
* @action: hotplug action to take
* @hcpu: CPU number
*
- * Returns the success/failure of the operation. (NOTIFY_OK, NOTIFY_BAD)
+ * Returns the success/failure of the operation. (%NOTIFY_OK, %NOTIFY_BAD)
*/
static int __cpuinit relay_hotcpu_callback(struct notifier_block *nb,
unsigned long action,
diff --git a/kernel/sched.c b/kernel/sched.c
index 0dc757246d8..a4ca632c477 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3006,23 +3006,6 @@ static inline void idle_balance(int cpu, struct rq *rq)
}
#endif
-static inline void wake_priority_sleeper(struct rq *rq)
-{
-#ifdef CONFIG_SCHED_SMT
- if (!rq->nr_running)
- return;
-
- spin_lock(&rq->lock);
- /*
- * If an SMT sibling task has been put to sleep for priority
- * reasons reschedule the idle task to see if it can now run.
- */
- if (rq->nr_running)
- resched_task(rq->idle);
- spin_unlock(&rq->lock);
-#endif
-}
-
DEFINE_PER_CPU(struct kernel_stat, kstat);
EXPORT_PER_CPU_SYMBOL(kstat);
@@ -3239,10 +3222,7 @@ void scheduler_tick(void)
update_cpu_clock(p, rq, now);
- if (p == rq->idle)
- /* Task on the idle queue */
- wake_priority_sleeper(rq);
- else
+ if (p != rq->idle)
task_running_tick(rq, p);
#ifdef CONFIG_SMP
update_load(rq);
@@ -3251,136 +3231,6 @@ void scheduler_tick(void)
#endif
}
-#ifdef CONFIG_SCHED_SMT
-static inline void wakeup_busy_runqueue(struct rq *rq)
-{
- /* If an SMT runqueue is sleeping due to priority reasons wake it up */
- if (rq->curr == rq->idle && rq->nr_running)
- resched_task(rq->idle);
-}
-
-/*
- * Called with interrupt disabled and this_rq's runqueue locked.
- */
-static void wake_sleeping_dependent(int this_cpu)
-{
- struct sched_domain *tmp, *sd = NULL;
- int i;
-
- for_each_domain(this_cpu, tmp) {
- if (tmp->flags & SD_SHARE_CPUPOWER) {
- sd = tmp;
- break;
- }
- }
-
- if (!sd)
- return;
-
- for_each_cpu_mask(i, sd->span) {
- struct rq *smt_rq = cpu_rq(i);
-
- if (i == this_cpu)
- continue;
- if (unlikely(!spin_trylock(&smt_rq->lock)))
- continue;
-
- wakeup_busy_runqueue(smt_rq);
- spin_unlock(&smt_rq->lock);
- }
-}
-
-/*
- * number of 'lost' timeslices this task wont be able to fully
- * utilize, if another task runs on a sibling. This models the
- * slowdown effect of other tasks running on siblings:
- */
-static inline unsigned long
-smt_slice(struct task_struct *p, struct sched_domain *sd)
-{
- return p->time_slice * (100 - sd->per_cpu_gain) / 100;
-}
-
-/*
- * To minimise lock contention and not have to drop this_rq's runlock we only
- * trylock the sibling runqueues and bypass those runqueues if we fail to
- * acquire their lock. As we only trylock the normal locking order does not
- * need to be obeyed.
- */
-static int
-dependent_sleeper(int this_cpu, struct rq *this_rq, struct task_struct *p)
-{
- struct sched_domain *tmp, *sd = NULL;
- int ret = 0, i;
-
- /* kernel/rt threads do not participate in dependent sleeping */
- if (!p->mm || rt_task(p))
- return 0;
-
- for_each_domain(this_cpu, tmp) {
- if (tmp->flags & SD_SHARE_CPUPOWER) {
- sd = tmp;
- break;
- }
- }
-
- if (!sd)
- return 0;
-
- for_each_cpu_mask(i, sd->span) {
- struct task_struct *smt_curr;
- struct rq *smt_rq;
-
- if (i == this_cpu)
- continue;
-
- smt_rq = cpu_rq(i);
- if (unlikely(!spin_trylock(&smt_rq->lock)))
- continue;
-
- smt_curr = smt_rq->curr;
-
- if (!smt_curr->mm)
- goto unlock;
-
- /*
- * If a user task with lower static priority than the
- * running task on the SMT sibling is trying to schedule,
- * delay it till there is proportionately less timeslice
- * left of the sibling task to prevent a lower priority
- * task from using an unfair proportion of the
- * physical cpu's resources. -ck
- */
- if (rt_task(smt_curr)) {
- /*
- * With real time tasks we run non-rt tasks only
- * per_cpu_gain% of the time.
- */
- if ((jiffies % DEF_TIMESLICE) >
- (sd->per_cpu_gain * DEF_TIMESLICE / 100))
- ret = 1;
- } else {
- if (smt_curr->static_prio < p->static_prio &&
- !TASK_PREEMPTS_CURR(p, smt_rq) &&
- smt_slice(smt_curr, sd) > task_timeslice(p))
- ret = 1;
- }
-unlock:
- spin_unlock(&smt_rq->lock);
- }
- return ret;
-}
-#else
-static inline void wake_sleeping_dependent(int this_cpu)
-{
-}
-static inline int
-dependent_sleeper(int this_cpu, struct rq *this_rq, struct task_struct *p)
-{
- return 0;
-}
-#endif
-
#if defined(CONFIG_PREEMPT) && defined(CONFIG_DEBUG_PREEMPT)
void fastcall add_preempt_count(int val)
@@ -3507,7 +3357,6 @@ need_resched_nonpreemptible:
if (!rq->nr_running) {
next = rq->idle;
rq->expired_timestamp = 0;
- wake_sleeping_dependent(cpu);
goto switch_tasks;
}
}
@@ -3547,8 +3396,6 @@ need_resched_nonpreemptible:
}
}
next->sleep_type = SLEEP_NORMAL;
- if (dependent_sleeper(cpu, rq, next))
- next = rq->idle;
switch_tasks:
if (next == rq->idle)
schedstat_inc(rq, sched_goidle);
@@ -3566,7 +3413,7 @@ switch_tasks:
sched_info_switch(prev, next);
if (likely(prev != next)) {
- next->timestamp = now;
+ next->timestamp = next->last_ran = now;
rq->nr_switches++;
rq->curr = next;
++*switch_count;
diff --git a/kernel/signal.c b/kernel/signal.c
index e2a7d4bf7d5..3670225ecbc 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1140,7 +1140,8 @@ int kill_pid_info(int sig, struct siginfo *info, struct pid *pid)
return error;
}
-static int kill_proc_info(int sig, struct siginfo *info, pid_t pid)
+int
+kill_proc_info(int sig, struct siginfo *info, pid_t pid)
{
int error;
rcu_read_lock();
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 3ca1d5ff031..1b255df4fcd 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -846,7 +846,8 @@ static ctl_table vm_table[] = {
.extra2 = &one_hundred,
},
#endif
-#ifdef CONFIG_X86_32
+#if defined(CONFIG_X86_32) || \
+ (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL))
{
.ctl_name = VM_VDSO_ENABLED,
.procname = "vdso_enabled",
@@ -1359,8 +1360,7 @@ void unregister_sysctl_table(struct ctl_table_header * header)
}
#else /* !CONFIG_SYSCTL */
-struct ctl_table_header * register_sysctl_table(ctl_table * table,
- int insert_at_head)
+struct ctl_table_header *register_sysctl_table(ctl_table * table)
{
return NULL;
}
diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index 193a0793af9..5b0e46b56fd 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -55,16 +55,18 @@ static DEFINE_SPINLOCK(clocksource_lock);
static char override_name[32];
static int finished_booting;
-/* clocksource_done_booting - Called near the end of bootup
+/* clocksource_done_booting - Called near the end of core bootup
*
- * Hack to avoid lots of clocksource churn at boot time
+ * Hack to avoid lots of clocksource churn at boot time.
+ * We use fs_initcall because we want this to start before
+ * device_initcall but after subsys_initcall.
*/
static int __init clocksource_done_booting(void)
{
finished_booting = 1;
return 0;
}
-late_initcall(clocksource_done_booting);
+fs_initcall(clocksource_done_booting);
#ifdef CONFIG_CLOCKSOURCE_WATCHDOG
static LIST_HEAD(watchdog_list);
diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index 12b3efeb9f6..5567745470f 100644
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -284,6 +284,42 @@ void tick_shutdown_broadcast(unsigned int *cpup)
spin_unlock_irqrestore(&tick_broadcast_lock, flags);
}
+void tick_suspend_broadcast(void)
+{
+ struct clock_event_device *bc;
+ unsigned long flags;
+
+ spin_lock_irqsave(&tick_broadcast_lock, flags);
+
+ bc = tick_broadcast_device.evtdev;
+ if (bc && tick_broadcast_device.mode == TICKDEV_MODE_PERIODIC)
+ clockevents_set_mode(bc, CLOCK_EVT_MODE_SHUTDOWN);
+
+ spin_unlock_irqrestore(&tick_broadcast_lock, flags);
+}
+
+int tick_resume_broadcast(void)
+{
+ struct clock_event_device *bc;
+ unsigned long flags;
+ int broadcast = 0;
+
+ spin_lock_irqsave(&tick_broadcast_lock, flags);
+
+ bc = tick_broadcast_device.evtdev;
+ if (bc) {
+ if (tick_broadcast_device.mode == TICKDEV_MODE_PERIODIC &&
+ !cpus_empty(tick_broadcast_mask))
+ tick_broadcast_start_periodic(bc);
+
+ broadcast = cpu_isset(smp_processor_id(), tick_broadcast_mask);
+ }
+ spin_unlock_irqrestore(&tick_broadcast_lock, flags);
+
+ return broadcast;
+}
+
+
#ifdef CONFIG_TICK_ONESHOT
static cpumask_t tick_broadcast_oneshot_mask;
diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c
index 4500e347f1b..43ba1bdec14 100644
--- a/kernel/time/tick-common.c
+++ b/kernel/time/tick-common.c
@@ -77,6 +77,7 @@ static void tick_periodic(int cpu)
void tick_handle_periodic(struct clock_event_device *dev)
{
int cpu = smp_processor_id();
+ ktime_t next;
tick_periodic(cpu);
@@ -86,12 +87,12 @@ void tick_handle_periodic(struct clock_event_device *dev)
* Setup the next period for devices, which do not have
* periodic mode:
*/
+ next = ktime_add(dev->next_event, tick_period);
for (;;) {
- ktime_t next = ktime_add(dev->next_event, tick_period);
-
if (!clockevents_program_event(dev, next, ktime_get()))
return;
tick_periodic(cpu);
+ next = ktime_add(next, tick_period);
}
}
@@ -297,6 +298,28 @@ static void tick_shutdown(unsigned int *cpup)
spin_unlock_irqrestore(&tick_device_lock, flags);
}
+static void tick_suspend_periodic(void)
+{
+ struct tick_device *td = &__get_cpu_var(tick_cpu_device);
+ unsigned long flags;
+
+ spin_lock_irqsave(&tick_device_lock, flags);
+ if (td->mode == TICKDEV_MODE_PERIODIC)
+ clockevents_set_mode(td->evtdev, CLOCK_EVT_MODE_SHUTDOWN);
+ spin_unlock_irqrestore(&tick_device_lock, flags);
+}
+
+static void tick_resume_periodic(void)
+{
+ struct tick_device *td = &__get_cpu_var(tick_cpu_device);
+ unsigned long flags;
+
+ spin_lock_irqsave(&tick_device_lock, flags);
+ if (td->mode == TICKDEV_MODE_PERIODIC)
+ tick_setup_periodic(td->evtdev, 0);
+ spin_unlock_irqrestore(&tick_device_lock, flags);
+}
+
/*
* Notification about clock event devices
*/
@@ -324,6 +347,16 @@ static int tick_notify(struct notifier_block *nb, unsigned long reason,
tick_shutdown(dev);
break;
+ case CLOCK_EVT_NOTIFY_SUSPEND:
+ tick_suspend_periodic();
+ tick_suspend_broadcast();
+ break;
+
+ case CLOCK_EVT_NOTIFY_RESUME:
+ if (!tick_resume_broadcast())
+ tick_resume_periodic();
+ break;
+
default:
break;
}
diff --git a/kernel/time/tick-internal.h b/kernel/time/tick-internal.h
index 54861a0f29f..75890efd24f 100644
--- a/kernel/time/tick-internal.h
+++ b/kernel/time/tick-internal.h
@@ -67,6 +67,8 @@ extern int tick_check_broadcast_device(struct clock_event_device *dev);
extern int tick_is_broadcast_device(struct clock_event_device *dev);
extern void tick_broadcast_on_off(unsigned long reason, int *oncpu);
extern void tick_shutdown_broadcast(unsigned int *cpup);
+extern void tick_suspend_broadcast(void);
+extern int tick_resume_broadcast(void);
extern void
tick_set_periodic_handler(struct clock_event_device *dev, int broadcast);
@@ -90,6 +92,8 @@ static inline int tick_device_uses_broadcast(struct clock_event_device *dev,
static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { }
static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { }
static inline void tick_shutdown_broadcast(unsigned int *cpup) { }
+static inline void tick_suspend_broadcast(void) { }
+static inline int tick_resume_broadcast(void) { return 0; }
/*
* Set the periodic handler in non broadcast mode
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 512a4a90646..51556b95f60 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -21,6 +21,8 @@
#include <linux/sched.h>
#include <linux/tick.h>
+#include <asm/irq_regs.h>
+
#include "tick-internal.h"
/*
diff --git a/kernel/timer.c b/kernel/timer.c
index cb1b86a9c52..797cccb8643 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -711,6 +711,7 @@ static unsigned long cmp_next_hrtimer_event(unsigned long now,
/**
* next_timer_interrupt - return the jiffy of the next pending timer
+ * @now: current time (in jiffies)
*/
unsigned long get_next_timer_interrupt(unsigned long now)
{
@@ -861,6 +862,8 @@ int do_settimeofday(struct timespec *tv)
clock->error = 0;
ntp_clear();
+ update_vsyscall(&xtime, clock);
+
write_sequnlock_irqrestore(&xtime_lock, flags);
/* signal hrtimers about time change */
@@ -908,7 +911,7 @@ static inline void change_clocksource(void) { }
#endif
/**
- * timeofday_is_continuous - check to see if timekeeping is free running
+ * timekeeping_is_continuous - check to see if timekeeping is free running
*/
int timekeeping_is_continuous(void)
{
@@ -996,6 +999,9 @@ static int timekeeping_resume(struct sys_device *dev)
write_sequnlock_irqrestore(&xtime_lock, flags);
touch_softlockup_watchdog();
+
+ clockevents_notify(CLOCK_EVT_NOTIFY_RESUME, NULL);
+
/* Resume hrtimers */
clock_was_set();
@@ -1010,6 +1016,9 @@ static int timekeeping_suspend(struct sys_device *dev, pm_message_t state)
timekeeping_suspended = 1;
timekeeping_suspend_time = read_persistent_clock();
write_sequnlock_irqrestore(&xtime_lock, flags);
+
+ clockevents_notify(CLOCK_EVT_NOTIFY_SUSPEND, NULL);
+
return 0;
}
@@ -1650,8 +1659,8 @@ static void __devinit migrate_timers(int cpu)
new_base = get_cpu_var(tvec_bases);
local_irq_disable();
- spin_lock(&new_base->lock);
- spin_lock(&old_base->lock);
+ double_spin_lock(&new_base->lock, &old_base->lock,
+ smp_processor_id() < cpu);
BUG_ON(old_base->running_timer);
@@ -1664,8 +1673,8 @@ static void __devinit migrate_timers(int cpu)
migrate_timer_list(new_base, old_base->tv5.vec + i);
}
- spin_unlock(&old_base->lock);
- spin_unlock(&new_base->lock);
+ double_spin_unlock(&new_base->lock, &old_base->lock,
+ smp_processor_id() < cpu);
local_irq_enable();
put_cpu_var(tvec_bases);
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-03 13:10:41 +0000