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-rw-r--r--kernel/audit.c4
-rw-r--r--kernel/auditfilter.c26
-rw-r--r--kernel/auditsc.c117
-rw-r--r--kernel/delayacct.c8
-rw-r--r--kernel/hrtimer.c4
-rw-r--r--kernel/irq/manage.c28
-rw-r--r--kernel/kprobes.c1
-rw-r--r--kernel/rcupdate.c4
-rw-r--r--kernel/rtmutex.c2
-rw-r--r--kernel/sched.c22
-rw-r--r--kernel/signal.c25
-rw-r--r--kernel/softirq.c22
-rw-r--r--kernel/softlockup.c4
-rw-r--r--kernel/taskstats.c32
-rw-r--r--kernel/timer.c8
-rw-r--r--kernel/workqueue.c58
16 files changed, 267 insertions, 98 deletions
diff --git a/kernel/audit.c b/kernel/audit.c
index d417ca1db79..0a36091ed71 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -690,9 +690,7 @@ static const struct inotify_operations audit_inotify_ops = {
/* Initialize audit support at boot time. */
static int __init audit_init(void)
{
-#ifdef CONFIG_AUDITSYSCALL
int i;
-#endif
printk(KERN_INFO "audit: initializing netlink socket (%s)\n",
audit_default ? "enabled" : "disabled");
@@ -717,10 +715,10 @@ static int __init audit_init(void)
audit_ih = inotify_init(&audit_inotify_ops);
if (IS_ERR(audit_ih))
audit_panic("cannot initialize inotify handle");
+#endif
for (i = 0; i < AUDIT_INODE_BUCKETS; i++)
INIT_LIST_HEAD(&audit_inode_hash[i]);
-#endif
return 0;
}
diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index 5b4e16276ca..6a9a5c5a4e7 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -442,6 +442,7 @@ static struct audit_entry *audit_rule_to_entry(struct audit_rule *rule)
case AUDIT_EQUAL:
break;
default:
+ err = -EINVAL;
goto exit_free;
}
}
@@ -579,6 +580,7 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data,
case AUDIT_EQUAL:
break;
default:
+ err = -EINVAL;
goto exit_free;
}
}
@@ -1134,6 +1136,14 @@ static inline int audit_add_rule(struct audit_entry *entry,
struct audit_watch *watch = entry->rule.watch;
struct nameidata *ndp, *ndw;
int h, err, putnd_needed = 0;
+#ifdef CONFIG_AUDITSYSCALL
+ int dont_count = 0;
+
+ /* If either of these, don't count towards total */
+ if (entry->rule.listnr == AUDIT_FILTER_USER ||
+ entry->rule.listnr == AUDIT_FILTER_TYPE)
+ dont_count = 1;
+#endif
if (inode_f) {
h = audit_hash_ino(inode_f->val);
@@ -1174,6 +1184,10 @@ static inline int audit_add_rule(struct audit_entry *entry,
} else {
list_add_tail_rcu(&entry->list, list);
}
+#ifdef CONFIG_AUDITSYSCALL
+ if (!dont_count)
+ audit_n_rules++;
+#endif
mutex_unlock(&audit_filter_mutex);
if (putnd_needed)
@@ -1198,6 +1212,14 @@ static inline int audit_del_rule(struct audit_entry *entry,
struct audit_watch *watch, *tmp_watch = entry->rule.watch;
LIST_HEAD(inotify_list);
int h, ret = 0;
+#ifdef CONFIG_AUDITSYSCALL
+ int dont_count = 0;
+
+ /* If either of these, don't count towards total */
+ if (entry->rule.listnr == AUDIT_FILTER_USER ||
+ entry->rule.listnr == AUDIT_FILTER_TYPE)
+ dont_count = 1;
+#endif
if (inode_f) {
h = audit_hash_ino(inode_f->val);
@@ -1235,6 +1257,10 @@ static inline int audit_del_rule(struct audit_entry *entry,
list_del_rcu(&e->list);
call_rcu(&e->rcu, audit_free_rule_rcu);
+#ifdef CONFIG_AUDITSYSCALL
+ if (!dont_count)
+ audit_n_rules--;
+#endif
mutex_unlock(&audit_filter_mutex);
if (!list_empty(&inotify_list))
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index ae40ac8c39e..efc1b74bebf 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -85,6 +85,9 @@ extern int audit_enabled;
/* Indicates that audit should log the full pathname. */
#define AUDIT_NAME_FULL -1
+/* number of audit rules */
+int audit_n_rules;
+
/* When fs/namei.c:getname() is called, we store the pointer in name and
* we don't let putname() free it (instead we free all of the saved
* pointers at syscall exit time).
@@ -174,6 +177,7 @@ struct audit_aux_data_path {
/* The per-task audit context. */
struct audit_context {
+ int dummy; /* must be the first element */
int in_syscall; /* 1 if task is in a syscall */
enum audit_state state;
unsigned int serial; /* serial number for record */
@@ -514,7 +518,7 @@ static inline struct audit_context *audit_get_context(struct task_struct *tsk,
context->return_valid = return_valid;
context->return_code = return_code;
- if (context->in_syscall && !context->auditable) {
+ if (context->in_syscall && !context->dummy && !context->auditable) {
enum audit_state state;
state = audit_filter_syscall(tsk, context, &audit_filter_list[AUDIT_FILTER_EXIT]);
@@ -530,17 +534,7 @@ static inline struct audit_context *audit_get_context(struct task_struct *tsk,
}
get_context:
- context->pid = tsk->pid;
- context->ppid = sys_getppid(); /* sic. tsk == current in all cases */
- context->uid = tsk->uid;
- context->gid = tsk->gid;
- context->euid = tsk->euid;
- context->suid = tsk->suid;
- context->fsuid = tsk->fsuid;
- context->egid = tsk->egid;
- context->sgid = tsk->sgid;
- context->fsgid = tsk->fsgid;
- context->personality = tsk->personality;
+
tsk->audit_context = NULL;
return context;
}
@@ -749,6 +743,17 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
const char *tty;
/* tsk == current */
+ context->pid = tsk->pid;
+ context->ppid = sys_getppid(); /* sic. tsk == current in all cases */
+ context->uid = tsk->uid;
+ context->gid = tsk->gid;
+ context->euid = tsk->euid;
+ context->suid = tsk->suid;
+ context->fsuid = tsk->fsuid;
+ context->egid = tsk->egid;
+ context->sgid = tsk->sgid;
+ context->fsgid = tsk->fsgid;
+ context->personality = tsk->personality;
ab = audit_log_start(context, GFP_KERNEL, AUDIT_SYSCALL);
if (!ab)
@@ -1066,7 +1071,8 @@ void audit_syscall_entry(int arch, int major,
context->argv[3] = a4;
state = context->state;
- if (state == AUDIT_SETUP_CONTEXT || state == AUDIT_BUILD_CONTEXT)
+ context->dummy = !audit_n_rules;
+ if (!context->dummy && (state == AUDIT_SETUP_CONTEXT || state == AUDIT_BUILD_CONTEXT))
state = audit_filter_syscall(tsk, context, &audit_filter_list[AUDIT_FILTER_ENTRY]);
if (likely(state == AUDIT_DISABLED))
return;
@@ -1199,14 +1205,18 @@ void audit_putname(const char *name)
#endif
}
-static void audit_inode_context(int idx, const struct inode *inode)
+/* Copy inode data into an audit_names. */
+static void audit_copy_inode(struct audit_names *name, const struct inode *inode)
{
- struct audit_context *context = current->audit_context;
-
- selinux_get_inode_sid(inode, &context->names[idx].osid);
+ name->ino = inode->i_ino;
+ name->dev = inode->i_sb->s_dev;
+ name->mode = inode->i_mode;
+ name->uid = inode->i_uid;
+ name->gid = inode->i_gid;
+ name->rdev = inode->i_rdev;
+ selinux_get_inode_sid(inode, &name->osid);
}
-
/**
* audit_inode - store the inode and device from a lookup
* @name: name being audited
@@ -1240,20 +1250,14 @@ void __audit_inode(const char *name, const struct inode *inode)
++context->ino_count;
#endif
}
- context->names[idx].ino = inode->i_ino;
- context->names[idx].dev = inode->i_sb->s_dev;
- context->names[idx].mode = inode->i_mode;
- context->names[idx].uid = inode->i_uid;
- context->names[idx].gid = inode->i_gid;
- context->names[idx].rdev = inode->i_rdev;
- audit_inode_context(idx, inode);
+ audit_copy_inode(&context->names[idx], inode);
}
/**
* audit_inode_child - collect inode info for created/removed objects
* @dname: inode's dentry name
* @inode: inode being audited
- * @pino: inode number of dentry parent
+ * @parent: inode of dentry parent
*
* For syscalls that create or remove filesystem objects, audit_inode
* can only collect information for the filesystem object's parent.
@@ -1264,7 +1268,7 @@ void __audit_inode(const char *name, const struct inode *inode)
* unsuccessful attempts.
*/
void __audit_inode_child(const char *dname, const struct inode *inode,
- unsigned long pino)
+ const struct inode *parent)
{
int idx;
struct audit_context *context = current->audit_context;
@@ -1278,7 +1282,7 @@ void __audit_inode_child(const char *dname, const struct inode *inode,
if (!dname)
goto update_context;
for (idx = 0; idx < context->name_count; idx++)
- if (context->names[idx].ino == pino) {
+ if (context->names[idx].ino == parent->i_ino) {
const char *name = context->names[idx].name;
if (!name)
@@ -1302,16 +1306,47 @@ update_context:
context->names[idx].name_len = AUDIT_NAME_FULL;
context->names[idx].name_put = 0; /* don't call __putname() */
- if (inode) {
- context->names[idx].ino = inode->i_ino;
- context->names[idx].dev = inode->i_sb->s_dev;
- context->names[idx].mode = inode->i_mode;
- context->names[idx].uid = inode->i_uid;
- context->names[idx].gid = inode->i_gid;
- context->names[idx].rdev = inode->i_rdev;
- audit_inode_context(idx, inode);
- } else
- context->names[idx].ino = (unsigned long)-1;
+ if (!inode)
+ context->names[idx].ino = (unsigned long)-1;
+ else
+ audit_copy_inode(&context->names[idx], inode);
+
+ /* A parent was not found in audit_names, so copy the inode data for the
+ * provided parent. */
+ if (!found_name) {
+ idx = context->name_count++;
+#if AUDIT_DEBUG
+ context->ino_count++;
+#endif
+ audit_copy_inode(&context->names[idx], parent);
+ }
+}
+
+/**
+ * audit_inode_update - update inode info for last collected name
+ * @inode: inode being audited
+ *
+ * When open() is called on an existing object with the O_CREAT flag, the inode
+ * data audit initially collects is incorrect. This additional hook ensures
+ * audit has the inode data for the actual object to be opened.
+ */
+void __audit_inode_update(const struct inode *inode)
+{
+ struct audit_context *context = current->audit_context;
+ int idx;
+
+ if (!context->in_syscall || !inode)
+ return;
+
+ if (context->name_count == 0) {
+ context->name_count++;
+#if AUDIT_DEBUG
+ context->ino_count++;
+#endif
+ }
+ idx = context->name_count - 1;
+
+ audit_copy_inode(&context->names[idx], inode);
}
/**
@@ -1642,7 +1677,7 @@ int audit_bprm(struct linux_binprm *bprm)
unsigned long p, next;
void *to;
- if (likely(!audit_enabled || !context))
+ if (likely(!audit_enabled || !context || context->dummy))
return 0;
ax = kmalloc(sizeof(*ax) + PAGE_SIZE * MAX_ARG_PAGES - bprm->p,
@@ -1680,7 +1715,7 @@ int audit_socketcall(int nargs, unsigned long *args)
struct audit_aux_data_socketcall *ax;
struct audit_context *context = current->audit_context;
- if (likely(!context))
+ if (likely(!context || context->dummy))
return 0;
ax = kmalloc(sizeof(*ax) + nargs * sizeof(unsigned long), GFP_KERNEL);
@@ -1708,7 +1743,7 @@ int audit_sockaddr(int len, void *a)
struct audit_aux_data_sockaddr *ax;
struct audit_context *context = current->audit_context;
- if (likely(!context))
+ if (likely(!context || context->dummy))
return 0;
ax = kmalloc(sizeof(*ax) + len, GFP_KERNEL);
diff --git a/kernel/delayacct.c b/kernel/delayacct.c
index f05392d6426..57ca3730205 100644
--- a/kernel/delayacct.c
+++ b/kernel/delayacct.c
@@ -19,15 +19,15 @@
#include <linux/sysctl.h>
#include <linux/delayacct.h>
-int delayacct_on __read_mostly; /* Delay accounting turned on/off */
+int delayacct_on __read_mostly = 1; /* Delay accounting turned on/off */
kmem_cache_t *delayacct_cache;
-static int __init delayacct_setup_enable(char *str)
+static int __init delayacct_setup_disable(char *str)
{
- delayacct_on = 1;
+ delayacct_on = 0;
return 1;
}
-__setup("delayacct", delayacct_setup_enable);
+__setup("nodelayacct", delayacct_setup_disable);
void delayacct_init(void)
{
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index d17766d40da..be989efc785 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -835,7 +835,7 @@ static void migrate_hrtimers(int cpu)
}
#endif /* CONFIG_HOTPLUG_CPU */
-static int __devinit hrtimer_cpu_notify(struct notifier_block *self,
+static int __cpuinit hrtimer_cpu_notify(struct notifier_block *self,
unsigned long action, void *hcpu)
{
long cpu = (long)hcpu;
@@ -859,7 +859,7 @@ static int __devinit hrtimer_cpu_notify(struct notifier_block *self,
return NOTIFY_OK;
}
-static struct notifier_block __devinitdata hrtimers_nb = {
+static struct notifier_block __cpuinitdata hrtimers_nb = {
.notifier_call = hrtimer_cpu_notify,
};
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 4e461438e48..92be519eff2 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -137,16 +137,40 @@ EXPORT_SYMBOL(enable_irq);
* @irq: interrupt to control
* @on: enable/disable power management wakeup
*
- * Enable/disable power management wakeup mode
+ * Enable/disable power management wakeup mode, which is
+ * disabled by default. Enables and disables must match,
+ * just as they match for non-wakeup mode support.
+ *
+ * Wakeup mode lets this IRQ wake the system from sleep
+ * states like "suspend to RAM".
*/
int set_irq_wake(unsigned int irq, unsigned int on)
{
struct irq_desc *desc = irq_desc + irq;
unsigned long flags;
int ret = -ENXIO;
+ int (*set_wake)(unsigned, unsigned) = desc->chip->set_wake;
+ /* wakeup-capable irqs can be shared between drivers that
+ * don't need to have the same sleep mode behaviors.
+ */
spin_lock_irqsave(&desc->lock, flags);
- if (desc->chip->set_wake)
+ if (on) {
+ if (desc->wake_depth++ == 0)
+ desc->status |= IRQ_WAKEUP;
+ else
+ set_wake = NULL;
+ } else {
+ if (desc->wake_depth == 0) {
+ printk(KERN_WARNING "Unbalanced IRQ %d "
+ "wake disable\n", irq);
+ WARN_ON(1);
+ } else if (--desc->wake_depth == 0)
+ desc->status &= ~IRQ_WAKEUP;
+ else
+ set_wake = NULL;
+ }
+ if (set_wake)
ret = desc->chip->set_wake(irq, on);
spin_unlock_irqrestore(&desc->lock, flags);
return ret;
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 64aab081153..3f57dfdc8f9 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -393,6 +393,7 @@ static int __kprobes add_new_kprobe(struct kprobe *old_p, struct kprobe *p)
static inline void add_aggr_kprobe(struct kprobe *ap, struct kprobe *p)
{
copy_kprobe(p, ap);
+ flush_insn_slot(ap);
ap->addr = p->addr;
ap->pre_handler = aggr_pre_handler;
ap->fault_handler = aggr_fault_handler;
diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c
index 759805c9859..436ab35f6fa 100644
--- a/kernel/rcupdate.c
+++ b/kernel/rcupdate.c
@@ -548,7 +548,7 @@ static void __devinit rcu_online_cpu(int cpu)
tasklet_init(&per_cpu(rcu_tasklet, cpu), rcu_process_callbacks, 0UL);
}
-static int __devinit rcu_cpu_notify(struct notifier_block *self,
+static int __cpuinit rcu_cpu_notify(struct notifier_block *self,
unsigned long action, void *hcpu)
{
long cpu = (long)hcpu;
@@ -565,7 +565,7 @@ static int __devinit rcu_cpu_notify(struct notifier_block *self,
return NOTIFY_OK;
}
-static struct notifier_block __devinitdata rcu_nb = {
+static struct notifier_block __cpuinitdata rcu_nb = {
.notifier_call = rcu_cpu_notify,
};
diff --git a/kernel/rtmutex.c b/kernel/rtmutex.c
index d2ef13b485e..3e13a1e5856 100644
--- a/kernel/rtmutex.c
+++ b/kernel/rtmutex.c
@@ -7,6 +7,8 @@
* Copyright (C) 2005-2006 Timesys Corp., Thomas Gleixner <tglx@timesys.com>
* Copyright (C) 2005 Kihon Technologies Inc., Steven Rostedt
* Copyright (C) 2006 Esben Nielsen
+ *
+ * See Documentation/rt-mutex-design.txt for details.
*/
#include <linux/spinlock.h>
#include <linux/module.h>
diff --git a/kernel/sched.c b/kernel/sched.c
index b44b9a43b0f..a2be2d05529 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -4456,9 +4456,9 @@ asmlinkage long sys_sched_yield(void)
return 0;
}
-static inline int __resched_legal(void)
+static inline int __resched_legal(int expected_preempt_count)
{
- if (unlikely(preempt_count()))
+ if (unlikely(preempt_count() != expected_preempt_count))
return 0;
if (unlikely(system_state != SYSTEM_RUNNING))
return 0;
@@ -4484,7 +4484,7 @@ static void __cond_resched(void)
int __sched cond_resched(void)
{
- if (need_resched() && __resched_legal()) {
+ if (need_resched() && __resched_legal(0)) {
__cond_resched();
return 1;
}
@@ -4510,7 +4510,7 @@ int cond_resched_lock(spinlock_t *lock)
ret = 1;
spin_lock(lock);
}
- if (need_resched() && __resched_legal()) {
+ if (need_resched() && __resched_legal(1)) {
spin_release(&lock->dep_map, 1, _THIS_IP_);
_raw_spin_unlock(lock);
preempt_enable_no_resched();
@@ -4526,7 +4526,7 @@ int __sched cond_resched_softirq(void)
{
BUG_ON(!in_softirq());
- if (need_resched() && __resched_legal()) {
+ if (need_resched() && __resched_legal(0)) {
raw_local_irq_disable();
_local_bh_enable();
raw_local_irq_enable();
@@ -6494,7 +6494,12 @@ static int build_sched_domains(const cpumask_t *cpu_map)
for (i = 0; i < MAX_NUMNODES; i++)
init_numa_sched_groups_power(sched_group_nodes[i]);
- init_numa_sched_groups_power(sched_group_allnodes);
+ if (sched_group_allnodes) {
+ int group = cpu_to_allnodes_group(first_cpu(*cpu_map));
+ struct sched_group *sg = &sched_group_allnodes[group];
+
+ init_numa_sched_groups_power(sg);
+ }
#endif
/* Attach the domains */
@@ -6761,6 +6766,11 @@ void __init sched_init(void)
}
set_load_weight(&init_task);
+
+#ifdef CONFIG_RT_MUTEXES
+ plist_head_init(&init_task.pi_waiters, &init_task.pi_lock);
+#endif
+
/*
* The boot idle thread does lazy MMU switching as well:
*/
diff --git a/kernel/signal.c b/kernel/signal.c
index 7fe874d12fa..bfdb5686fa3 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -791,22 +791,31 @@ out:
/*
* Force a signal that the process can't ignore: if necessary
* we unblock the signal and change any SIG_IGN to SIG_DFL.
+ *
+ * Note: If we unblock the signal, we always reset it to SIG_DFL,
+ * since we do not want to have a signal handler that was blocked
+ * be invoked when user space had explicitly blocked it.
+ *
+ * We don't want to have recursive SIGSEGV's etc, for example.
*/
-
int
force_sig_info(int sig, struct siginfo *info, struct task_struct *t)
{
unsigned long int flags;
- int ret;
+ int ret, blocked, ignored;
+ struct k_sigaction *action;
spin_lock_irqsave(&t->sighand->siglock, flags);
- if (t->sighand->action[sig-1].sa.sa_handler == SIG_IGN) {
- t->sighand->action[sig-1].sa.sa_handler = SIG_DFL;
- }
- if (sigismember(&t->blocked, sig)) {
- sigdelset(&t->blocked, sig);
+ action = &t->sighand->action[sig-1];
+ ignored = action->sa.sa_handler == SIG_IGN;
+ blocked = sigismember(&t->blocked, sig);
+ if (blocked || ignored) {
+ action->sa.sa_handler = SIG_DFL;
+ if (blocked) {
+ sigdelset(&t->blocked, sig);
+ recalc_sigpending_tsk(t);
+ }
}
- recalc_sigpending_tsk(t);
ret = specific_send_sig_info(sig, info, t);
spin_unlock_irqrestore(&t->sighand->siglock, flags);
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 0f08a84ae30..3789ca98197 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -65,6 +65,7 @@ static inline void wakeup_softirqd(void)
* This one is for softirq.c-internal use,
* where hardirqs are disabled legitimately:
*/
+#ifdef CONFIG_TRACE_IRQFLAGS
static void __local_bh_disable(unsigned long ip)
{
unsigned long flags;
@@ -80,6 +81,13 @@ static void __local_bh_disable(unsigned long ip)
trace_softirqs_off(ip);
raw_local_irq_restore(flags);
}
+#else /* !CONFIG_TRACE_IRQFLAGS */
+static inline void __local_bh_disable(unsigned long ip)
+{
+ add_preempt_count(SOFTIRQ_OFFSET);
+ barrier();
+}
+#endif /* CONFIG_TRACE_IRQFLAGS */
void local_bh_disable(void)
{
@@ -121,12 +129,16 @@ EXPORT_SYMBOL(_local_bh_enable);
void local_bh_enable(void)
{
+#ifdef CONFIG_TRACE_IRQFLAGS
unsigned long flags;
WARN_ON_ONCE(in_irq());
+#endif
WARN_ON_ONCE(irqs_disabled());
+#ifdef CONFIG_TRACE_IRQFLAGS
local_irq_save(flags);
+#endif
/*
* Are softirqs going to be turned on now:
*/
@@ -142,18 +154,22 @@ void local_bh_enable(void)
do_softirq();
dec_preempt_count();
+#ifdef CONFIG_TRACE_IRQFLAGS
local_irq_restore(flags);
+#endif
preempt_check_resched();
}
EXPORT_SYMBOL(local_bh_enable);
void local_bh_enable_ip(unsigned long ip)
{
+#ifdef CONFIG_TRACE_IRQFLAGS
unsigned long flags;
WARN_ON_ONCE(in_irq());
local_irq_save(flags);
+#endif
/*
* Are softirqs going to be turned on now:
*/
@@ -169,7 +185,9 @@ void local_bh_enable_ip(unsigned long ip)
do_softirq();
dec_preempt_count();
+#ifdef CONFIG_TRACE_IRQFLAGS
local_irq_restore(flags);
+#endif
preempt_check_resched();
}
EXPORT_SYMBOL(local_bh_enable_ip);
@@ -547,7 +565,7 @@ static void takeover_tasklets(unsigned int cpu)
}
#endif /* CONFIG_HOTPLUG_CPU */
-static int __devinit cpu_callback(struct notifier_block *nfb,
+static int __cpuinit cpu_callback(struct notifier_block *nfb,
unsigned long action,
void *hcpu)
{
@@ -587,7 +605,7 @@ static int __devinit cpu_callback(struct notifier_block *nfb,
return NOTIFY_OK;
}
-static struct notifier_block __devinitdata cpu_nfb = {
+static struct notifier_block __cpuinitdata cpu_nfb = {
.notifier_call = cpu_callback
};
diff --git a/kernel/softlockup.c b/kernel/softlockup.c
index 6b76caa2298..03e6a2b0b78 100644
--- a/kernel/softlockup.c
+++ b/kernel/softlockup.c
@@ -104,7 +104,7 @@ static int watchdog(void * __bind_cpu)
/*
* Create/destroy watchdog threads as CPUs come and go:
*/
-static int __devinit
+static int __cpuinit
cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
{
int hotcpu = (unsigned long)hcpu;
@@ -142,7 +142,7 @@ cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
return NOTIFY_OK;
}
-static struct notifier_block __devinitdata cpu_nfb = {
+static struct notifier_block __cpuinitdata cpu_nfb = {
.notifier_call = cpu_callback
};
diff --git a/kernel/taskstats.c b/kernel/taskstats.c
index f45179ce028..e7818765733 100644
--- a/kernel/taskstats.c
+++ b/kernel/taskstats.c
@@ -121,46 +121,45 @@ static int send_reply(struct sk_buff *skb, pid_t pid)
/*
* Send taskstats data in @skb to listeners registered for @cpu's exit data
*/
-static int send_cpu_listeners(struct sk_buff *skb, unsigned int cpu)
+static void send_cpu_listeners(struct sk_buff *skb, unsigned int cpu)
{
struct genlmsghdr *genlhdr = nlmsg_data((struct nlmsghdr *)skb->data);
struct listener_list *listeners;
struct listener *s, *tmp;
struct sk_buff *skb_next, *skb_cur = skb;
void *reply = genlmsg_data(genlhdr);
- int rc, ret, delcount = 0;
+ int rc, delcount = 0;
rc = genlmsg_end(skb, reply);
if (rc < 0) {
nlmsg_free(skb);
- return rc;
+ return;
}
rc = 0;
listeners = &per_cpu(listener_array, cpu);
down_read(&listeners->sem);
- list_for_each_entry_safe(s, tmp, &listeners->list, list) {
+ list_for_each_entry(s, &listeners->list, list) {
skb_next = NULL;
if (!list_is_last(&s->list, &listeners->list)) {
skb_next = skb_clone(skb_cur, GFP_KERNEL);
- if (!skb_next) {
- nlmsg_free(skb_cur);
- rc = -ENOMEM;
+ if (!skb_next)
break;
- }
}
- ret = genlmsg_unicast(skb_cur, s->pid);
- if (ret == -ECONNREFUSED) {
+ rc = genlmsg_unicast(skb_cur, s->pid);
+ if (rc == -ECONNREFUSED) {
s->valid = 0;
delcount++;
- rc = ret;
}
skb_cur = skb_next;
}
up_read(&listeners->sem);
+ if (skb_cur)
+ nlmsg_free(skb_cur);
+
if (!delcount)
- return rc;
+ return;
/* Delete invalidated entries */
down_write(&listeners->sem);
@@ -171,13 +170,12 @@ static int send_cpu_listeners(struct sk_buff *skb, unsigned int cpu)
}
}
up_write(&listeners->sem);
- return rc;
}
static int fill_pid(pid_t pid, struct task_struct *pidtsk,
struct taskstats *stats)
{
- int rc;
+ int rc = 0;
struct task_struct *tsk = pidtsk;
if (!pidtsk) {
@@ -196,12 +194,10 @@ static int fill_pid(pid_t pid, struct task_struct *pidtsk,
* Each accounting subsystem adds calls to its functions to
* fill in relevant parts of struct taskstsats as follows
*
- * rc = per-task-foo(stats, tsk);
- * if (rc)
- * goto err;
+ * per-task-foo(stats, tsk);
*/
- rc = delayacct_add_tsk(stats, tsk);
+ delayacct_add_tsk(stats, tsk);
stats->version = TASKSTATS_VERSION;
/* Define err: label here if needed */
diff --git a/kernel/timer.c b/kernel/timer.c
index 05809c2e2fd..b650f04888e 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -84,7 +84,7 @@ typedef struct tvec_t_base_s tvec_base_t;
tvec_base_t boot_tvec_bases;
EXPORT_SYMBOL(boot_tvec_bases);
-static DEFINE_PER_CPU(tvec_base_t *, tvec_bases) = { &boot_tvec_bases };
+static DEFINE_PER_CPU(tvec_base_t *, tvec_bases) = &boot_tvec_bases;
static inline void set_running_timer(tvec_base_t *base,
struct timer_list *timer)
@@ -408,7 +408,7 @@ static int cascade(tvec_base_t *base, tvec_t *tv, int index)
* This function cascades all vectors and executes all expired timer
* vectors.
*/
-#define INDEX(N) (base->timer_jiffies >> (TVR_BITS + N * TVN_BITS)) & TVN_MASK
+#define INDEX(N) ((base->timer_jiffies >> (TVR_BITS + (N) * TVN_BITS)) & TVN_MASK)
static inline void __run_timers(tvec_base_t *base)
{
@@ -1688,7 +1688,7 @@ static void __devinit migrate_timers(int cpu)
}
#endif /* CONFIG_HOTPLUG_CPU */
-static int __devinit timer_cpu_notify(struct notifier_block *self,
+static int __cpuinit timer_cpu_notify(struct notifier_block *self,
unsigned long action, void *hcpu)
{
long cpu = (long)hcpu;
@@ -1708,7 +1708,7 @@ static int __devinit timer_cpu_notify(struct notifier_block *self,
return NOTIFY_OK;
}
-static struct notifier_block __devinitdata timers_nb = {
+static struct notifier_block __cpuinitdata timers_nb = {
.notifier_call = timer_cpu_notify,
};
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index eebb1d83923..448e8f7b342 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -93,9 +93,12 @@ static void __queue_work(struct cpu_workqueue_struct *cwq,
spin_unlock_irqrestore(&cwq->lock, flags);
}
-/*
- * Queue work on a workqueue. Return non-zero if it was successfully
- * added.
+/**
+ * queue_work - queue work on a workqueue
+ * @wq: workqueue to use
+ * @work: work to queue
+ *
+ * Returns non-zero if it was successfully added.
*
* We queue the work to the CPU it was submitted, but there is no
* guarantee that it will be processed by that CPU.
@@ -128,6 +131,14 @@ static void delayed_work_timer_fn(unsigned long __data)
__queue_work(per_cpu_ptr(wq->cpu_wq, cpu), work);
}
+/**
+ * queue_delayed_work - queue work on a workqueue after delay
+ * @wq: workqueue to use
+ * @work: work to queue
+ * @delay: number of jiffies to wait before queueing
+ *
+ * Returns non-zero if it was successfully added.
+ */
int fastcall queue_delayed_work(struct workqueue_struct *wq,
struct work_struct *work, unsigned long delay)
{
@@ -150,6 +161,15 @@ int fastcall queue_delayed_work(struct workqueue_struct *wq,
}
EXPORT_SYMBOL_GPL(queue_delayed_work);
+/**
+ * queue_delayed_work_on - queue work on specific CPU after delay
+ * @cpu: CPU number to execute work on
+ * @wq: workqueue to use
+ * @work: work to queue
+ * @delay: number of jiffies to wait before queueing
+ *
+ * Returns non-zero if it was successfully added.
+ */
int queue_delayed_work_on(int cpu, struct workqueue_struct *wq,
struct work_struct *work, unsigned long delay)
{
@@ -275,8 +295,9 @@ static void flush_cpu_workqueue(struct cpu_workqueue_struct *cwq)
}
}
-/*
+/**
* flush_workqueue - ensure that any scheduled work has run to completion.
+ * @wq: workqueue to flush
*
* Forces execution of the workqueue and blocks until its completion.
* This is typically used in driver shutdown handlers.
@@ -400,6 +421,12 @@ static void cleanup_workqueue_thread(struct workqueue_struct *wq, int cpu)
kthread_stop(p);
}
+/**
+ * destroy_workqueue - safely terminate a workqueue
+ * @wq: target workqueue
+ *
+ * Safely destroy a workqueue. All work currently pending will be done first.
+ */
void destroy_workqueue(struct workqueue_struct *wq)
{
int cpu;
@@ -425,18 +452,41 @@ EXPORT_SYMBOL_GPL(destroy_workqueue);
static struct workqueue_struct *keventd_wq;
+/**
+ * schedule_work - put work task in global workqueue
+ * @work: job to be done
+ *
+ * This puts a job in the kernel-global workqueue.
+ */
int fastcall schedule_work(struct work_struct *work)
{
return queue_work(keventd_wq, work);
}
EXPORT_SYMBOL(schedule_work);
+/**
+ * schedule_delayed_work - put work task in global workqueue after delay
+ * @work: job to be done
+ * @delay: number of jiffies to wait
+ *
+ * After waiting for a given time this puts a job in the kernel-global
+ * workqueue.
+ */
int fastcall schedule_delayed_work(struct work_struct *work, unsigned long delay)
{
return queue_delayed_work(keventd_wq, work, delay);
}
EXPORT_SYMBOL(schedule_delayed_work);
+/**
+ * schedule_delayed_work_on - queue work in global workqueue on CPU after delay
+ * @cpu: cpu to use
+ * @work: job to be done
+ * @delay: number of jiffies to wait
+ *
+ * After waiting for a given time this puts a job in the kernel-global
+ * workqueue on the specified CPU.
+ */
int schedule_delayed_work_on(int cpu,
struct work_struct *work, unsigned long delay)
{
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-24 17:23:20 +0000