aboutsummaryrefslogtreecommitdiff
path: root/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'kernel')
-rw-r--r--kernel/Makefile5
-rw-r--r--kernel/audit.c2
-rw-r--r--kernel/cgroup.c45
-rw-r--r--kernel/debug/kdb/kdb_main.c2
-rw-r--r--kernel/exit.c14
-rw-r--r--kernel/fork.c41
-rw-r--r--kernel/freezer.c9
-rw-r--r--kernel/futex.c62
-rw-r--r--kernel/hrtimer.c2
-rw-r--r--kernel/irq/irqdesc.c40
-rw-r--r--kernel/kexec.c2
-rw-r--r--kernel/latencytop.c23
-rw-r--r--kernel/panic.c1
-rw-r--r--kernel/perf_event.c107
-rw-r--r--kernel/power/Kconfig5
-rw-r--r--kernel/power/Makefile6
-rw-r--r--kernel/power/hibernate.c11
-rw-r--r--kernel/power/nvs.c136
-rw-r--r--kernel/power/process.c8
-rw-r--r--kernel/power/suspend.c6
-rw-r--r--kernel/power/swap.c7
-rw-r--r--kernel/printk.c44
-rw-r--r--kernel/rcutiny.c3
-rw-r--r--kernel/sched.c2
-rw-r--r--kernel/smp.c19
-rw-r--r--kernel/softirq.c19
-rw-r--r--kernel/srcu.c15
-rw-r--r--kernel/sys.c6
-rw-r--r--kernel/sysctl.c31
-rw-r--r--kernel/sysctl_binary.c2
-rw-r--r--kernel/taskstats.c2
-rw-r--r--kernel/time.c4
-rw-r--r--kernel/time/clocksource.c10
-rw-r--r--kernel/time/ntp.c425
-rw-r--r--kernel/time/timekeeping.c47
-rw-r--r--kernel/trace/Makefile2
-rw-r--r--kernel/trace/blktrace.c37
-rw-r--r--kernel/trace/trace.c6
-rw-r--r--kernel/trace/trace_entries.h2
-rw-r--r--kernel/trace/trace_syscalls.c33
-rw-r--r--kernel/user_namespace.c15
41 files changed, 813 insertions, 445 deletions
diff --git a/kernel/Makefile b/kernel/Makefile
index 0b5ff083fa2..353d3fe8ba3 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -43,7 +43,7 @@ obj-$(CONFIG_RT_MUTEXES) += rtmutex.o
obj-$(CONFIG_DEBUG_RT_MUTEXES) += rtmutex-debug.o
obj-$(CONFIG_RT_MUTEX_TESTER) += rtmutex-tester.o
obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o
-obj-$(CONFIG_USE_GENERIC_SMP_HELPERS) += smp.o
+obj-$(CONFIG_SMP) += smp.o
ifneq ($(CONFIG_SMP),y)
obj-y += up.o
endif
@@ -100,6 +100,7 @@ obj-$(CONFIG_FUNCTION_TRACER) += trace/
obj-$(CONFIG_TRACING) += trace/
obj-$(CONFIG_X86_DS) += trace/
obj-$(CONFIG_RING_BUFFER) += trace/
+obj-$(CONFIG_TRACEPOINTS) += trace/
obj-$(CONFIG_SMP) += sched_cpupri.o
obj-$(CONFIG_IRQ_WORK) += irq_work.o
obj-$(CONFIG_PERF_EVENTS) += perf_event.o
@@ -121,7 +122,7 @@ $(obj)/configs.o: $(obj)/config_data.h
# config_data.h contains the same information as ikconfig.h but gzipped.
# Info from config_data can be extracted from /proc/config*
targets += config_data.gz
-$(obj)/config_data.gz: .config FORCE
+$(obj)/config_data.gz: $(KCONFIG_CONFIG) FORCE
$(call if_changed,gzip)
quiet_cmd_ikconfiggz = IKCFG $@
diff --git a/kernel/audit.c b/kernel/audit.c
index 5842f65bedc..162e88e33bc 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -402,7 +402,7 @@ static void kauditd_send_skb(struct sk_buff *skb)
if (err < 0) {
BUG_ON(err != -ECONNREFUSED); /* Shouldn't happen */
printk(KERN_ERR "audit: *NO* daemon at audit_pid=%d\n", audit_pid);
- audit_log_lost("auditd dissapeared\n");
+ audit_log_lost("auditd disappeared\n");
audit_pid = 0;
/* we might get lucky and get this in the next auditd */
audit_hold_skb(skb);
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 51cddc11cd8..b24d7027b83 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -763,9 +763,8 @@ EXPORT_SYMBOL_GPL(cgroup_unlock);
* -> cgroup_mkdir.
*/
-static struct dentry *cgroup_lookup(struct inode *dir,
- struct dentry *dentry, struct nameidata *nd);
static int cgroup_mkdir(struct inode *dir, struct dentry *dentry, int mode);
+static struct dentry *cgroup_lookup(struct inode *, struct dentry *, struct nameidata *);
static int cgroup_rmdir(struct inode *unused_dir, struct dentry *dentry);
static int cgroup_populate_dir(struct cgroup *cgrp);
static const struct inode_operations cgroup_dir_inode_operations;
@@ -862,6 +861,11 @@ static void cgroup_diput(struct dentry *dentry, struct inode *inode)
iput(inode);
}
+static int cgroup_delete(const struct dentry *d)
+{
+ return 1;
+}
+
static void remove_dir(struct dentry *d)
{
struct dentry *parent = dget(d->d_parent);
@@ -912,7 +916,7 @@ static void cgroup_d_remove_dir(struct dentry *dentry)
parent = dentry->d_parent;
spin_lock(&parent->d_lock);
- spin_lock(&dentry->d_lock);
+ spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
list_del_init(&dentry->d_u.d_child);
spin_unlock(&dentry->d_lock);
spin_unlock(&parent->d_lock);
@@ -1451,6 +1455,11 @@ static int cgroup_set_super(struct super_block *sb, void *data)
static int cgroup_get_rootdir(struct super_block *sb)
{
+ static const struct dentry_operations cgroup_dops = {
+ .d_iput = cgroup_diput,
+ .d_delete = cgroup_delete,
+ };
+
struct inode *inode =
cgroup_new_inode(S_IFDIR | S_IRUGO | S_IXUGO | S_IWUSR, sb);
struct dentry *dentry;
@@ -1468,6 +1477,8 @@ static int cgroup_get_rootdir(struct super_block *sb)
return -ENOMEM;
}
sb->s_root = dentry;
+ /* for everything else we want ->d_op set */
+ sb->s_d_op = &cgroup_dops;
return 0;
}
@@ -2197,6 +2208,14 @@ static const struct inode_operations cgroup_dir_inode_operations = {
.rename = cgroup_rename,
};
+static struct dentry *cgroup_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+{
+ if (dentry->d_name.len > NAME_MAX)
+ return ERR_PTR(-ENAMETOOLONG);
+ d_add(dentry, NULL);
+ return NULL;
+}
+
/*
* Check if a file is a control file
*/
@@ -2207,26 +2226,6 @@ static inline struct cftype *__file_cft(struct file *file)
return __d_cft(file->f_dentry);
}
-static int cgroup_delete_dentry(const struct dentry *dentry)
-{
- return 1;
-}
-
-static struct dentry *cgroup_lookup(struct inode *dir,
- struct dentry *dentry, struct nameidata *nd)
-{
- static const struct dentry_operations cgroup_dentry_operations = {
- .d_delete = cgroup_delete_dentry,
- .d_iput = cgroup_diput,
- };
-
- if (dentry->d_name.len > NAME_MAX)
- return ERR_PTR(-ENAMETOOLONG);
- d_set_d_op(dentry, &cgroup_dentry_operations);
- d_add(dentry, NULL);
- return NULL;
-}
-
static int cgroup_create_file(struct dentry *dentry, mode_t mode,
struct super_block *sb)
{
diff --git a/kernel/debug/kdb/kdb_main.c b/kernel/debug/kdb/kdb_main.c
index a6e72976682..bd3e8e29caa 100644
--- a/kernel/debug/kdb/kdb_main.c
+++ b/kernel/debug/kdb/kdb_main.c
@@ -2914,7 +2914,7 @@ static void __init kdb_cmd_init(void)
}
}
-/* Intialize kdb_printf, breakpoint tables and kdb state */
+/* Initialize kdb_printf, breakpoint tables and kdb state */
void __init kdb_init(int lvl)
{
static int kdb_init_lvl = KDB_NOT_INITIALIZED;
diff --git a/kernel/exit.c b/kernel/exit.c
index 89c74861a3d..f9a45ebcc7b 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -994,6 +994,15 @@ NORET_TYPE void do_exit(long code)
exit_fs(tsk);
check_stack_usage();
exit_thread();
+
+ /*
+ * Flush inherited counters to the parent - before the parent
+ * gets woken up by child-exit notifications.
+ *
+ * because of cgroup mode, must be called before cgroup_exit()
+ */
+ perf_event_exit_task(tsk);
+
cgroup_exit(tsk, 1);
if (group_dead)
@@ -1007,11 +1016,6 @@ NORET_TYPE void do_exit(long code)
* FIXME: do that only when needed, using sched_exit tracepoint
*/
flush_ptrace_hw_breakpoint(tsk);
- /*
- * Flush inherited counters to the parent - before the parent
- * gets woken up by child-exit notifications.
- */
- perf_event_exit_task(tsk);
exit_notify(tsk, group_dead);
#ifdef CONFIG_NUMA
diff --git a/kernel/fork.c b/kernel/fork.c
index d9b44f20b6b..25e429152dd 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -66,6 +66,7 @@
#include <linux/posix-timers.h>
#include <linux/user-return-notifier.h>
#include <linux/oom.h>
+#include <linux/khugepaged.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
@@ -330,6 +331,9 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
retval = ksm_fork(mm, oldmm);
if (retval)
goto out;
+ retval = khugepaged_fork(mm, oldmm);
+ if (retval)
+ goto out;
prev = NULL;
for (mpnt = oldmm->mmap; mpnt; mpnt = mpnt->vm_next) {
@@ -529,6 +533,9 @@ void __mmdrop(struct mm_struct *mm)
mm_free_pgd(mm);
destroy_context(mm);
mmu_notifier_mm_destroy(mm);
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+ VM_BUG_ON(mm->pmd_huge_pte);
+#endif
free_mm(mm);
}
EXPORT_SYMBOL_GPL(__mmdrop);
@@ -543,6 +550,7 @@ void mmput(struct mm_struct *mm)
if (atomic_dec_and_test(&mm->mm_users)) {
exit_aio(mm);
ksm_exit(mm);
+ khugepaged_exit(mm); /* must run before exit_mmap */
exit_mmap(mm);
set_mm_exe_file(mm, NULL);
if (!list_empty(&mm->mmlist)) {
@@ -669,6 +677,10 @@ struct mm_struct *dup_mm(struct task_struct *tsk)
mm->token_priority = 0;
mm->last_interval = 0;
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+ mm->pmd_huge_pte = NULL;
+#endif
+
if (!mm_init(mm, tsk))
goto fail_nomem;
@@ -910,6 +922,7 @@ static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
sig->oom_adj = current->signal->oom_adj;
sig->oom_score_adj = current->signal->oom_score_adj;
+ sig->oom_score_adj_min = current->signal->oom_score_adj_min;
mutex_init(&sig->cred_guard_mutex);
@@ -1410,23 +1423,6 @@ long do_fork(unsigned long clone_flags,
}
/*
- * We hope to recycle these flags after 2.6.26
- */
- if (unlikely(clone_flags & CLONE_STOPPED)) {
- static int __read_mostly count = 100;
-
- if (count > 0 && printk_ratelimit()) {
- char comm[TASK_COMM_LEN];
-
- count--;
- printk(KERN_INFO "fork(): process `%s' used deprecated "
- "clone flags 0x%lx\n",
- get_task_comm(comm, current),
- clone_flags & CLONE_STOPPED);
- }
- }
-
- /*
* When called from kernel_thread, don't do user tracing stuff.
*/
if (likely(user_mode(regs)))
@@ -1464,16 +1460,7 @@ long do_fork(unsigned long clone_flags,
*/
p->flags &= ~PF_STARTING;
- if (unlikely(clone_flags & CLONE_STOPPED)) {
- /*
- * We'll start up with an immediate SIGSTOP.
- */
- sigaddset(&p->pending.signal, SIGSTOP);
- set_tsk_thread_flag(p, TIF_SIGPENDING);
- __set_task_state(p, TASK_STOPPED);
- } else {
- wake_up_new_task(p, clone_flags);
- }
+ wake_up_new_task(p, clone_flags);
tracehook_report_clone_complete(trace, regs,
clone_flags, nr, p);
diff --git a/kernel/freezer.c b/kernel/freezer.c
index bd1d42b17cb..66ecd2ead21 100644
--- a/kernel/freezer.c
+++ b/kernel/freezer.c
@@ -104,8 +104,13 @@ bool freeze_task(struct task_struct *p, bool sig_only)
}
if (should_send_signal(p)) {
- if (!signal_pending(p))
- fake_signal_wake_up(p);
+ fake_signal_wake_up(p);
+ /*
+ * fake_signal_wake_up() goes through p's scheduler
+ * lock and guarantees that TASK_STOPPED/TRACED ->
+ * TASK_RUNNING transition can't race with task state
+ * testing in try_to_freeze_tasks().
+ */
} else if (sig_only) {
return false;
} else {
diff --git a/kernel/futex.c b/kernel/futex.c
index 3019b92e691..b766d28accd 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -233,7 +233,7 @@ get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key)
{
unsigned long address = (unsigned long)uaddr;
struct mm_struct *mm = current->mm;
- struct page *page;
+ struct page *page, *page_head;
int err;
/*
@@ -265,11 +265,46 @@ again:
if (err < 0)
return err;
- page = compound_head(page);
- lock_page(page);
- if (!page->mapping) {
- unlock_page(page);
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+ page_head = page;
+ if (unlikely(PageTail(page))) {
put_page(page);
+ /* serialize against __split_huge_page_splitting() */
+ local_irq_disable();
+ if (likely(__get_user_pages_fast(address, 1, 1, &page) == 1)) {
+ page_head = compound_head(page);
+ /*
+ * page_head is valid pointer but we must pin
+ * it before taking the PG_lock and/or
+ * PG_compound_lock. The moment we re-enable
+ * irqs __split_huge_page_splitting() can
+ * return and the head page can be freed from
+ * under us. We can't take the PG_lock and/or
+ * PG_compound_lock on a page that could be
+ * freed from under us.
+ */
+ if (page != page_head) {
+ get_page(page_head);
+ put_page(page);
+ }
+ local_irq_enable();
+ } else {
+ local_irq_enable();
+ goto again;
+ }
+ }
+#else
+ page_head = compound_head(page);
+ if (page != page_head) {
+ get_page(page_head);
+ put_page(page);
+ }
+#endif
+
+ lock_page(page_head);
+ if (!page_head->mapping) {
+ unlock_page(page_head);
+ put_page(page_head);
goto again;
}
@@ -280,20 +315,20 @@ again:
* it's a read-only handle, it's expected that futexes attach to
* the object not the particular process.
*/
- if (PageAnon(page)) {
+ if (PageAnon(page_head)) {
key->both.offset |= FUT_OFF_MMSHARED; /* ref taken on mm */
key->private.mm = mm;
key->private.address = address;
} else {
key->both.offset |= FUT_OFF_INODE; /* inode-based key */
- key->shared.inode = page->mapping->host;
- key->shared.pgoff = page->index;
+ key->shared.inode = page_head->mapping->host;
+ key->shared.pgoff = page_head->index;
}
get_futex_key_refs(key);
- unlock_page(page);
- put_page(page);
+ unlock_page(page_head);
+ put_page(page_head);
return 0;
}
@@ -791,10 +826,9 @@ static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_q *this)
new_owner = rt_mutex_next_owner(&pi_state->pi_mutex);
/*
- * This happens when we have stolen the lock and the original
- * pending owner did not enqueue itself back on the rt_mutex.
- * Thats not a tragedy. We know that way, that a lock waiter
- * is on the fly. We make the futex_q waiter the pending owner.
+ * It is possible that the next waiter (the one that brought
+ * this owner to the kernel) timed out and is no longer
+ * waiting on the lock.
*/
if (!new_owner)
new_owner = this->task;
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 45da2b6920a..0c8d7c04861 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -1745,7 +1745,7 @@ schedule_hrtimeout_range_clock(ktime_t *expires, unsigned long delta,
}
/*
- * A NULL parameter means "inifinte"
+ * A NULL parameter means "infinite"
*/
if (!expires) {
schedule();
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 9988d03797f..282f20230e6 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -72,6 +72,8 @@ static inline int desc_node(struct irq_desc *desc) { return 0; }
static void desc_set_defaults(unsigned int irq, struct irq_desc *desc, int node)
{
+ int cpu;
+
desc->irq_data.irq = irq;
desc->irq_data.chip = &no_irq_chip;
desc->irq_data.chip_data = NULL;
@@ -83,7 +85,8 @@ static void desc_set_defaults(unsigned int irq, struct irq_desc *desc, int node)
desc->irq_count = 0;
desc->irqs_unhandled = 0;
desc->name = NULL;
- memset(desc->kstat_irqs, 0, nr_cpu_ids * sizeof(*(desc->kstat_irqs)));
+ for_each_possible_cpu(cpu)
+ *per_cpu_ptr(desc->kstat_irqs, cpu) = 0;
desc_smp_init(desc, node);
}
@@ -133,8 +136,7 @@ static struct irq_desc *alloc_desc(int irq, int node)
if (!desc)
return NULL;
/* allocate based on nr_cpu_ids */
- desc->kstat_irqs = kzalloc_node(nr_cpu_ids * sizeof(*desc->kstat_irqs),
- gfp, node);
+ desc->kstat_irqs = alloc_percpu(unsigned int);
if (!desc->kstat_irqs)
goto err_desc;
@@ -149,7 +151,7 @@ static struct irq_desc *alloc_desc(int irq, int node)
return desc;
err_kstat:
- kfree(desc->kstat_irqs);
+ free_percpu(desc->kstat_irqs);
err_desc:
kfree(desc);
return NULL;
@@ -166,7 +168,7 @@ static void free_desc(unsigned int irq)
mutex_unlock(&sparse_irq_lock);
free_masks(desc);
- kfree(desc->kstat_irqs);
+ free_percpu(desc->kstat_irqs);
kfree(desc);
}
@@ -234,7 +236,6 @@ struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
}
};
-static unsigned int kstat_irqs_all[NR_IRQS][NR_CPUS];
int __init early_irq_init(void)
{
int count, i, node = first_online_node;
@@ -250,7 +251,8 @@ int __init early_irq_init(void)
for (i = 0; i < count; i++) {
desc[i].irq_data.irq = i;
desc[i].irq_data.chip = &no_irq_chip;
- desc[i].kstat_irqs = kstat_irqs_all[i];
+ /* TODO : do this allocation on-demand ... */
+ desc[i].kstat_irqs = alloc_percpu(unsigned int);
alloc_masks(desc + i, GFP_KERNEL, node);
desc_smp_init(desc + i, node);
lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);
@@ -275,6 +277,22 @@ static void free_desc(unsigned int irq)
static inline int alloc_descs(unsigned int start, unsigned int cnt, int node)
{
+#if defined(CONFIG_KSTAT_IRQS_ONDEMAND)
+ struct irq_desc *desc;
+ unsigned int i;
+
+ for (i = 0; i < cnt; i++) {
+ desc = irq_to_desc(start + i);
+ if (desc && !desc->kstat_irqs) {
+ unsigned int __percpu *stats = alloc_percpu(unsigned int);
+
+ if (!stats)
+ return -1;
+ if (cmpxchg(&desc->kstat_irqs, NULL, stats) != NULL)
+ free_percpu(stats);
+ }
+ }
+#endif
return start;
}
#endif /* !CONFIG_SPARSE_IRQ */
@@ -391,7 +409,9 @@ void dynamic_irq_cleanup(unsigned int irq)
unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
{
struct irq_desc *desc = irq_to_desc(irq);
- return desc ? desc->kstat_irqs[cpu] : 0;
+
+ return desc && desc->kstat_irqs ?
+ *per_cpu_ptr(desc->kstat_irqs, cpu) : 0;
}
#ifdef CONFIG_GENERIC_HARDIRQS
@@ -401,10 +421,10 @@ unsigned int kstat_irqs(unsigned int irq)
int cpu;
int sum = 0;
- if (!desc)
+ if (!desc || !desc->kstat_irqs)
return 0;
for_each_possible_cpu(cpu)
- sum += desc->kstat_irqs[cpu];
+ sum += *per_cpu_ptr(desc->kstat_irqs, cpu);
return sum;
}
#endif /* CONFIG_GENERIC_HARDIRQS */
diff --git a/kernel/kexec.c b/kernel/kexec.c
index b55045bc756..ec19b92c7eb 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -163,7 +163,7 @@ static int do_kimage_alloc(struct kimage **rimage, unsigned long entry,
* just verifies it is an address we can use.
*
* Since the kernel does everything in page size chunks ensure
- * the destination addreses are page aligned. Too many
+ * the destination addresses are page aligned. Too many
* special cases crop of when we don't do this. The most
* insidious is getting overlapping destination addresses
* simply because addresses are changed to page size
diff --git a/kernel/latencytop.c b/kernel/latencytop.c
index 17110a4a4fc..ee74b35e528 100644
--- a/kernel/latencytop.c
+++ b/kernel/latencytop.c
@@ -241,24 +241,19 @@ static int lstats_show(struct seq_file *m, void *v)
seq_puts(m, "Latency Top version : v0.1\n");
for (i = 0; i < MAXLR; i++) {
- if (latency_record[i].backtrace[0]) {
+ struct latency_record *lr = &latency_record[i];
+
+ if (lr->backtrace[0]) {
int q;
- seq_printf(m, "%i %lu %lu ",
- latency_record[i].count,
- latency_record[i].time,
- latency_record[i].max);
+ seq_printf(m, "%i %lu %lu",
+ lr->count, lr->time, lr->max);
for (q = 0; q < LT_BACKTRACEDEPTH; q++) {
- char sym[KSYM_SYMBOL_LEN];
- char *c;
- if (!latency_record[i].backtrace[q])
+ unsigned long bt = lr->backtrace[q];
+ if (!bt)
break;
- if (latency_record[i].backtrace[q] == ULONG_MAX)
+ if (bt == ULONG_MAX)
break;
- sprint_symbol(sym, latency_record[i].backtrace[q]);
- c = strchr(sym, '+');
- if (c)
- *c = 0;
- seq_printf(m, "%s ", sym);
+ seq_printf(m, " %ps", (void *)bt);
}
seq_printf(m, "\n");
}
diff --git a/kernel/panic.c b/kernel/panic.c
index 4c13b1a88eb..991bb87a170 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -34,6 +34,7 @@ static int pause_on_oops_flag;
static DEFINE_SPINLOCK(pause_on_oops_lock);
int panic_timeout;
+EXPORT_SYMBOL_GPL(panic_timeout);
ATOMIC_NOTIFIER_HEAD(panic_notifier_list);
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 11847bf1e8c..84522c79698 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -38,6 +38,12 @@
#include <asm/irq_regs.h>
+enum event_type_t {
+ EVENT_FLEXIBLE = 0x1,
+ EVENT_PINNED = 0x2,
+ EVENT_ALL = EVENT_FLEXIBLE | EVENT_PINNED,
+};
+
atomic_t perf_task_events __read_mostly;
static atomic_t nr_mmap_events __read_mostly;
static atomic_t nr_comm_events __read_mostly;
@@ -65,6 +71,12 @@ int sysctl_perf_event_sample_rate __read_mostly = 100000;
static atomic64_t perf_event_id;
+static void cpu_ctx_sched_out(struct perf_cpu_context *cpuctx,
+ enum event_type_t event_type);
+
+static void cpu_ctx_sched_in(struct perf_cpu_context *cpuctx,
+ enum event_type_t event_type);
+
void __weak perf_event_print_debug(void) { }
extern __weak const char *perf_pmu_name(void)
@@ -72,6 +84,11 @@ extern __weak const char *perf_pmu_name(void)
return "pmu";
}
+static inline u64 perf_clock(void)
+{
+ return local_clock();
+}
+
void perf_pmu_disable(struct pmu *pmu)
{
int *count = this_cpu_ptr(pmu->pmu_disable_count);
@@ -240,11 +257,6 @@ static void perf_unpin_context(struct perf_event_context *ctx)
put_ctx(ctx);
}
-static inline u64 perf_clock(void)
-{
- return local_clock();
-}
-
/*
* Update the record of the current time in a context.
*/
@@ -256,6 +268,12 @@ static void update_context_time(struct perf_event_context *ctx)
ctx->timestamp = now;
}
+static u64 perf_event_time(struct perf_event *event)
+{
+ struct perf_event_context *ctx = event->ctx;
+ return ctx ? ctx->time : 0;
+}
+
/*
* Update the total_time_enabled and total_time_running fields for a event.
*/
@@ -269,7 +287,7 @@ static void update_event_times(struct perf_event *event)
return;
if (ctx->is_active)
- run_end = ctx->time;
+ run_end = perf_event_time(event);
else
run_end = event->tstamp_stopped;
@@ -278,7 +296,7 @@ static void update_event_times(struct perf_event *event)
if (event->state == PERF_EVENT_STATE_INACTIVE)
run_end = event->tstamp_stopped;
else
- run_end = ctx->time;
+ run_end = perf_event_time(event);
event->total_time_running = run_end - event->tstamp_running;
}
@@ -534,6 +552,7 @@ event_sched_out(struct perf_event *event,
struct perf_cpu_context *cpuctx,
struct perf_event_context *ctx)
{
+ u64 tstamp = perf_event_time(event);
u64 delta;
/*
* An event which could not be activated because of
@@ -545,7 +564,7 @@ event_sched_out(struct perf_event *event,
&& !event_filter_match(event)) {
delta = ctx->time - event->tstamp_stopped;
event->tstamp_running += delta;
- event->tstamp_stopped = ctx->time;
+ event->tstamp_stopped = tstamp;
}
if (event->state != PERF_EVENT_STATE_ACTIVE)
@@ -556,7 +575,7 @@ event_sched_out(struct perf_event *event,
event->pending_disable = 0;
event->state = PERF_EVENT_STATE_OFF;
}
- event->tstamp_stopped = ctx->time;
+ event->tstamp_stopped = tstamp;
event->pmu->del(event, 0);
event->oncpu = -1;
@@ -768,6 +787,8 @@ event_sched_in(struct perf_event *event,
struct perf_cpu_context *cpuctx,
struct perf_event_context *ctx)
{
+ u64 tstamp = perf_event_time(event);
+
if (event->state <= PERF_EVENT_STATE_OFF)
return 0;
@@ -784,9 +805,9 @@ event_sched_in(struct perf_event *event,
return -EAGAIN;
}
- event->tstamp_running += ctx->time - event->tstamp_stopped;
+ event->tstamp_running += tstamp - event->tstamp_stopped;
- event->shadow_ctx_time = ctx->time - ctx->timestamp;
+ event->shadow_ctx_time = tstamp - ctx->timestamp;
if (!is_software_event(event))
cpuctx->active_oncpu++;
@@ -898,11 +919,13 @@ static int group_can_go_on(struct perf_event *event,
static void add_event_to_ctx(struct perf_event *event,
struct perf_event_context *ctx)
{
+ u64 tstamp = perf_event_time(event);
+
list_add_event(event, ctx);
perf_group_attach(event);
- event->tstamp_enabled = ctx->time;
- event->tstamp_running = ctx->time;
- event->tstamp_stopped = ctx->time;
+ event->tstamp_enabled = tstamp;
+ event->tstamp_running = tstamp;
+ event->tstamp_stopped = tstamp;
}
/*
@@ -937,7 +960,7 @@ static void __perf_install_in_context(void *info)
add_event_to_ctx(event, ctx);
- if (event->cpu != -1 && event->cpu != smp_processor_id())
+ if (!event_filter_match(event))
goto unlock;
/*
@@ -1042,14 +1065,13 @@ static void __perf_event_mark_enabled(struct perf_event *event,
struct perf_event_context *ctx)
{
struct perf_event *sub;
+ u64 tstamp = perf_event_time(event);
event->state = PERF_EVENT_STATE_INACTIVE;
- event->tstamp_enabled = ctx->time - event->total_time_enabled;
+ event->tstamp_enabled = tstamp - event->total_time_enabled;
list_for_each_entry(sub, &event->sibling_list, group_entry) {
- if (sub->state >= PERF_EVENT_STATE_INACTIVE) {
- sub->tstamp_enabled =
- ctx->time - sub->total_time_enabled;
- }
+ if (sub->state >= PERF_EVENT_STATE_INACTIVE)
+ sub->tstamp_enabled = tstamp - sub->total_time_enabled;
}
}
@@ -1082,7 +1104,7 @@ static void __perf_event_enable(void *info)
goto unlock;
__perf_event_mark_enabled(event, ctx);
- if (event->cpu != -1 && event->cpu != smp_processor_id())
+ if (!event_filter_match(event))
goto unlock;
/*
@@ -1193,12 +1215,6 @@ static int perf_event_refresh(struct perf_event *event, int refresh)
return 0;
}
-enum event_type_t {
- EVENT_FLEXIBLE = 0x1,
- EVENT_PINNED = 0x2,
- EVENT_ALL = EVENT_FLEXIBLE | EVENT_PINNED,
-};
-
static void ctx_sched_out(struct perf_event_context *ctx,
struct perf_cpu_context *cpuctx,
enum event_type_t event_type)
@@ -1435,7 +1451,7 @@ ctx_pinned_sched_in(struct perf_event_context *