aboutsummaryrefslogtreecommitdiffstats
path: root/kernel
diff options
context:
space:
mode:
authorIngo Molnar <mingo@elte.hu>2009-01-30 18:23:30 +0100
committerIngo Molnar <mingo@elte.hu>2009-01-30 18:23:30 +0100
commitc43e0e46adf79c321ed3fbf0351e1005fb8a2413 (patch)
tree35b9ab361651f649d3c9aa69f159812eba50d154 /kernel
parentdba3d36b2f0842ed7f25c33cd3a2ccdb3d0df9db (diff)
parentf2257b70b0f9b2fe8f2afd83fc6798dca75930b8 (diff)
downloadmrst-s0i3-test-c43e0e46adf79c321ed3fbf0351e1005fb8a2413.tar.gz
mrst-s0i3-test-c43e0e46adf79c321ed3fbf0351e1005fb8a2413.tar.xz
mrst-s0i3-test-c43e0e46adf79c321ed3fbf0351e1005fb8a2413.zip
Merge branch 'linus' into core/percpu
Conflicts: kernel/irq/handle.c
Diffstat (limited to 'kernel')
-rw-r--r--kernel/cgroup.c28
-rw-r--r--kernel/irq/handle.c16
-rw-r--r--kernel/irq/manage.c10
-rw-r--r--kernel/power/disk.c10
4 files changed, 45 insertions, 19 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index c29831076e7..5a54ff42874 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1115,8 +1115,10 @@ static void cgroup_kill_sb(struct super_block *sb) {
}
write_unlock(&css_set_lock);
- list_del(&root->root_list);
- root_count--;
+ if (!list_empty(&root->root_list)) {
+ list_del(&root->root_list);
+ root_count--;
+ }
mutex_unlock(&cgroup_mutex);
@@ -2434,7 +2436,9 @@ static long cgroup_create(struct cgroup *parent, struct dentry *dentry,
err_remove:
+ cgroup_lock_hierarchy(root);
list_del(&cgrp->sibling);
+ cgroup_unlock_hierarchy(root);
root->number_of_cgroups--;
err_destroy:
@@ -2507,7 +2511,7 @@ static int cgroup_clear_css_refs(struct cgroup *cgrp)
for_each_subsys(cgrp->root, ss) {
struct cgroup_subsys_state *css = cgrp->subsys[ss->subsys_id];
int refcnt;
- do {
+ while (1) {
/* We can only remove a CSS with a refcnt==1 */
refcnt = atomic_read(&css->refcnt);
if (refcnt > 1) {
@@ -2521,7 +2525,10 @@ static int cgroup_clear_css_refs(struct cgroup *cgrp)
* css_tryget() to spin until we set the
* CSS_REMOVED bits or abort
*/
- } while (atomic_cmpxchg(&css->refcnt, refcnt, 0) != refcnt);
+ if (atomic_cmpxchg(&css->refcnt, refcnt, 0) == refcnt)
+ break;
+ cpu_relax();
+ }
}
done:
for_each_subsys(cgrp->root, ss) {
@@ -2991,20 +2998,21 @@ int cgroup_clone(struct task_struct *tsk, struct cgroup_subsys *subsys,
mutex_unlock(&cgroup_mutex);
return 0;
}
- task_lock(tsk);
- cg = tsk->cgroups;
- parent = task_cgroup(tsk, subsys->subsys_id);
/* Pin the hierarchy */
- if (!atomic_inc_not_zero(&parent->root->sb->s_active)) {
+ if (!atomic_inc_not_zero(&root->sb->s_active)) {
/* We race with the final deactivate_super() */
mutex_unlock(&cgroup_mutex);
return 0;
}
/* Keep the cgroup alive */
+ task_lock(tsk);
+ parent = task_cgroup(tsk, subsys->subsys_id);
+ cg = tsk->cgroups;
get_css_set(cg);
task_unlock(tsk);
+
mutex_unlock(&cgroup_mutex);
/* Now do the VFS work to create a cgroup */
@@ -3043,7 +3051,7 @@ int cgroup_clone(struct task_struct *tsk, struct cgroup_subsys *subsys,
mutex_unlock(&inode->i_mutex);
put_css_set(cg);
- deactivate_super(parent->root->sb);
+ deactivate_super(root->sb);
/* The cgroup is still accessible in the VFS, but
* we're not going to try to rmdir() it at this
* point. */
@@ -3069,7 +3077,7 @@ int cgroup_clone(struct task_struct *tsk, struct cgroup_subsys *subsys,
mutex_lock(&cgroup_mutex);
put_css_set(cg);
mutex_unlock(&cgroup_mutex);
- deactivate_super(parent->root->sb);
+ deactivate_super(root->sb);
return ret;
}
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 375d68cd5bf..f51eaee921b 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -40,6 +40,18 @@ void handle_bad_irq(unsigned int irq, struct irq_desc *desc)
ack_bad_irq(irq);
}
+#if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_HARDIRQS)
+static void __init init_irq_default_affinity(void)
+{
+ alloc_bootmem_cpumask_var(&irq_default_affinity);
+ cpumask_setall(irq_default_affinity);
+}
+#else
+static void __init init_irq_default_affinity(void)
+{
+}
+#endif
+
/*
* Linux has a controller-independent interrupt architecture.
* Every controller has a 'controller-template', that is used
@@ -133,6 +145,8 @@ int __init early_irq_init(void)
int legacy_count;
int i;
+ init_irq_default_affinity();
+
/* initialize nr_irqs based on nr_cpu_ids */
arch_probe_nr_irqs();
printk(KERN_INFO "NR_IRQS:%d nr_irqs:%d\n", NR_IRQS, nr_irqs);
@@ -229,6 +243,8 @@ int __init early_irq_init(void)
int count;
int i;
+ init_irq_default_affinity();
+
printk(KERN_INFO "NR_IRQS:%d\n", NR_IRQS);
desc = irq_desc;
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index b98739af455..a3a5dc9ef34 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -15,17 +15,9 @@
#include "internals.h"
-#ifdef CONFIG_SMP
+#if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_HARDIRQS)
cpumask_var_t irq_default_affinity;
-static int init_irq_default_affinity(void)
-{
- alloc_cpumask_var(&irq_default_affinity, GFP_KERNEL);
- cpumask_setall(irq_default_affinity);
- return 0;
-}
-core_initcall(init_irq_default_affinity);
-
/**
* synchronize_irq - wait for pending IRQ handlers (on other CPUs)
* @irq: interrupt number to wait for
diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index 45e8541ab7e..432ee575c9e 100644
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -71,6 +71,14 @@ void hibernation_set_ops(struct platform_hibernation_ops *ops)
mutex_unlock(&pm_mutex);
}
+static bool entering_platform_hibernation;
+
+bool system_entering_hibernation(void)
+{
+ return entering_platform_hibernation;
+}
+EXPORT_SYMBOL(system_entering_hibernation);
+
#ifdef CONFIG_PM_DEBUG
static void hibernation_debug_sleep(void)
{
@@ -411,6 +419,7 @@ int hibernation_platform_enter(void)
if (error)
goto Close;
+ entering_platform_hibernation = true;
suspend_console();
error = device_suspend(PMSG_HIBERNATE);
if (error) {
@@ -445,6 +454,7 @@ int hibernation_platform_enter(void)
Finish:
hibernation_ops->finish();
Resume_devices:
+ entering_platform_hibernation = false;
device_resume(PMSG_RESTORE);
resume_console();
Close: