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-rw-r--r--kernel/cpu.c2
-rw-r--r--kernel/cpuset.c2
-rw-r--r--kernel/irq/internals.h2
-rw-r--r--kernel/irq/manage.c68
-rw-r--r--kernel/irq/migration.c11
-rw-r--r--kernel/irq/proc.c2
-rw-r--r--kernel/lockdep.c4
-rw-r--r--kernel/panic.c1
-rw-r--r--kernel/profile.c4
-rw-r--r--kernel/ptrace.c4
-rw-r--r--kernel/sched.c5
-rw-r--r--kernel/sysctl.c10
-rw-r--r--kernel/trace/ring_buffer.c2
-rw-r--r--kernel/trace/trace_mmiotrace.c16
-rw-r--r--kernel/trace/trace_stack.c24
15 files changed, 101 insertions, 56 deletions
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 5a732c5ef08b..8ea32e8d68b0 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -462,7 +462,7 @@ out:
* It must be called by the arch code on the new cpu, before the new cpu
* enables interrupts and before the "boot" cpu returns from __cpu_up().
*/
-void notify_cpu_starting(unsigned int cpu)
+void __cpuinit notify_cpu_starting(unsigned int cpu)
{
unsigned long val = CPU_STARTING;
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index da7ff6137f37..96c0ba13b8cd 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -585,7 +585,7 @@ static int generate_sched_domains(cpumask_t **domains,
int i, j, k; /* indices for partition finding loops */
cpumask_t *doms; /* resulting partition; i.e. sched domains */
struct sched_domain_attr *dattr; /* attributes for custom domains */
- int ndoms; /* number of sched domains in result */
+ int ndoms = 0; /* number of sched domains in result */
int nslot; /* next empty doms[] cpumask_t slot */
doms = NULL;
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index c9767e641980..64c1c7253dae 100644
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -25,6 +25,8 @@ static inline void unregister_handler_proc(unsigned int irq,
struct irqaction *action) { }
#endif
+extern int irq_select_affinity_usr(unsigned int irq);
+
/*
* Debugging printout:
*/
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index c498a1b8c621..801addda3c43 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -82,24 +82,27 @@ int irq_can_set_affinity(unsigned int irq)
int irq_set_affinity(unsigned int irq, cpumask_t cpumask)
{
struct irq_desc *desc = irq_to_desc(irq);
+ unsigned long flags;
if (!desc->chip->set_affinity)
return -EINVAL;
+ spin_lock_irqsave(&desc->lock, flags);
+
#ifdef CONFIG_GENERIC_PENDING_IRQ
if (desc->status & IRQ_MOVE_PCNTXT || desc->status & IRQ_DISABLED) {
- unsigned long flags;
-
- spin_lock_irqsave(&desc->lock, flags);
desc->affinity = cpumask;
desc->chip->set_affinity(irq, cpumask);
- spin_unlock_irqrestore(&desc->lock, flags);
- } else
- set_pending_irq(irq, cpumask);
+ } else {
+ desc->status |= IRQ_MOVE_PENDING;
+ desc->pending_mask = cpumask;
+ }
#else
desc->affinity = cpumask;
desc->chip->set_affinity(irq, cpumask);
#endif
+ desc->status |= IRQ_AFFINITY_SET;
+ spin_unlock_irqrestore(&desc->lock, flags);
return 0;
}
@@ -107,24 +110,59 @@ int irq_set_affinity(unsigned int irq, cpumask_t cpumask)
/*
* Generic version of the affinity autoselector.
*/
-int irq_select_affinity(unsigned int irq)
+int do_irq_select_affinity(unsigned int irq, struct irq_desc *desc)
{
cpumask_t mask;
- struct irq_desc *desc;
if (!irq_can_set_affinity(irq))
return 0;
cpus_and(mask, cpu_online_map, irq_default_affinity);
- desc = irq_to_desc(irq);
+ /*
+ * Preserve an userspace affinity setup, but make sure that
+ * one of the targets is online.
+ */
+ if (desc->status & (IRQ_AFFINITY_SET | IRQ_NO_BALANCING)) {
+ if (cpus_intersects(desc->affinity, cpu_online_map))
+ mask = desc->affinity;
+ else
+ desc->status &= ~IRQ_AFFINITY_SET;
+ }
+
desc->affinity = mask;
desc->chip->set_affinity(irq, mask);
return 0;
}
+#else
+static inline int do_irq_select_affinity(unsigned int irq, struct irq_desc *d)
+{
+ return irq_select_affinity(irq);
+}
#endif
+/*
+ * Called when affinity is set via /proc/irq
+ */
+int irq_select_affinity_usr(unsigned int irq)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&desc->lock, flags);
+ ret = do_irq_select_affinity(irq, desc);
+ spin_unlock_irqrestore(&desc->lock, flags);
+
+ return ret;
+}
+
+#else
+static inline int do_irq_select_affinity(int irq, struct irq_desc *desc)
+{
+ return 0;
+}
#endif
/**
@@ -327,7 +365,7 @@ int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
* IRQF_TRIGGER_* but the PIC does not support multiple
* flow-types?
*/
- pr_warning("No set_type function for IRQ %d (%s)\n", irq,
+ pr_debug("No set_type function for IRQ %d (%s)\n", irq,
chip ? (chip->name ? : "unknown") : "unknown");
return 0;
}
@@ -445,8 +483,12 @@ __setup_irq(unsigned int irq, struct irq_desc * desc, struct irqaction *new)
/* Undo nested disables: */
desc->depth = 1;
+ /* Exclude IRQ from balancing if requested */
+ if (new->flags & IRQF_NOBALANCING)
+ desc->status |= IRQ_NO_BALANCING;
+
/* Set default affinity mask once everything is setup */
- irq_select_affinity(irq);
+ do_irq_select_affinity(irq, desc);
} else if ((new->flags & IRQF_TRIGGER_MASK)
&& (new->flags & IRQF_TRIGGER_MASK)
@@ -459,10 +501,6 @@ __setup_irq(unsigned int irq, struct irq_desc * desc, struct irqaction *new)
*p = new;
- /* Exclude IRQ from balancing */
- if (new->flags & IRQF_NOBALANCING)
- desc->status |= IRQ_NO_BALANCING;
-
/* Reset broken irq detection when installing new handler */
desc->irq_count = 0;
desc->irqs_unhandled = 0;
diff --git a/kernel/irq/migration.c b/kernel/irq/migration.c
index 90b920d3f52b..9db681d95814 100644
--- a/kernel/irq/migration.c
+++ b/kernel/irq/migration.c
@@ -1,17 +1,6 @@
#include <linux/irq.h>
-void set_pending_irq(unsigned int irq, cpumask_t mask)
-{
- struct irq_desc *desc = irq_to_desc(irq);
- unsigned long flags;
-
- spin_lock_irqsave(&desc->lock, flags);
- desc->status |= IRQ_MOVE_PENDING;
- desc->pending_mask = mask;
- spin_unlock_irqrestore(&desc->lock, flags);
-}
-
void move_masked_irq(int irq)
{
struct irq_desc *desc = irq_to_desc(irq);
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index 4d161c70ba55..d257e7d6a8a4 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -62,7 +62,7 @@ static ssize_t irq_affinity_proc_write(struct file *file,
if (!cpus_intersects(new_value, cpu_online_map))
/* Special case for empty set - allow the architecture
code to set default SMP affinity. */
- return irq_select_affinity(irq) ? -EINVAL : count;
+ return irq_select_affinity_usr(irq) ? -EINVAL : count;
irq_set_affinity(irq, new_value);
diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index 06e157119d2b..46a404173db2 100644
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -3276,10 +3276,10 @@ void __init lockdep_info(void)
{
printk("Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar\n");
- printk("... MAX_LOCKDEP_SUBCLASSES: %lu\n", MAX_LOCKDEP_SUBCLASSES);
+ printk("... MAX_LOCKDEP_SUBCLASSES: %lu\n", MAX_LOCKDEP_SUBCLASSES);
printk("... MAX_LOCK_DEPTH: %lu\n", MAX_LOCK_DEPTH);
printk("... MAX_LOCKDEP_KEYS: %lu\n", MAX_LOCKDEP_KEYS);
- printk("... CLASSHASH_SIZE: %lu\n", CLASSHASH_SIZE);
+ printk("... CLASSHASH_SIZE: %lu\n", CLASSHASH_SIZE);
printk("... MAX_LOCKDEP_ENTRIES: %lu\n", MAX_LOCKDEP_ENTRIES);
printk("... MAX_LOCKDEP_CHAINS: %lu\n", MAX_LOCKDEP_CHAINS);
printk("... CHAINHASH_SIZE: %lu\n", CHAINHASH_SIZE);
diff --git a/kernel/panic.c b/kernel/panic.c
index 6513aac8e992..4d5088355bfe 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -167,6 +167,7 @@ static const struct tnt tnts[] = {
* 'M' - System experienced a machine check exception.
* 'B' - System has hit bad_page.
* 'U' - Userspace-defined naughtiness.
+ * 'D' - Kernel has oopsed before
* 'A' - ACPI table overridden.
* 'W' - Taint on warning.
* 'C' - modules from drivers/staging are loaded.
diff --git a/kernel/profile.c b/kernel/profile.c
index 5b7d1ac7124c..dc41827fbfee 100644
--- a/kernel/profile.c
+++ b/kernel/profile.c
@@ -351,7 +351,7 @@ out:
put_cpu();
}
-static int __devinit profile_cpu_callback(struct notifier_block *info,
+static int __cpuinit profile_cpu_callback(struct notifier_block *info,
unsigned long action, void *__cpu)
{
int node, cpu = (unsigned long)__cpu;
@@ -596,7 +596,7 @@ out_cleanup:
#define create_hash_tables() ({ 0; })
#endif
-int create_proc_profile(void)
+int __ref create_proc_profile(void) /* false positive from hotcpu_notifier */
{
struct proc_dir_entry *entry;
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 1e68e4c39e2c..4c8bcd7dd8e0 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -612,7 +612,7 @@ int generic_ptrace_pokedata(struct task_struct *tsk, long addr, long data)
return (copied == sizeof(data)) ? 0 : -EIO;
}
-#if defined CONFIG_COMPAT && defined __ARCH_WANT_COMPAT_SYS_PTRACE
+#if defined CONFIG_COMPAT
#include <linux/compat.h>
int compat_ptrace_request(struct task_struct *child, compat_long_t request,
@@ -709,4 +709,4 @@ asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
unlock_kernel();
return ret;
}
-#endif /* CONFIG_COMPAT && __ARCH_WANT_COMPAT_SYS_PTRACE */
+#endif /* CONFIG_COMPAT */
diff --git a/kernel/sched.c b/kernel/sched.c
index 9b1e79371c20..b7480fb5c3dc 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1453,9 +1453,10 @@ static int task_hot(struct task_struct *p, u64 now, struct sched_domain *sd);
static unsigned long cpu_avg_load_per_task(int cpu)
{
struct rq *rq = cpu_rq(cpu);
+ unsigned long nr_running = ACCESS_ONCE(rq->nr_running);
- if (rq->nr_running)
- rq->avg_load_per_task = rq->load.weight / rq->nr_running;
+ if (nr_running)
+ rq->avg_load_per_task = rq->load.weight / nr_running;
else
rq->avg_load_per_task = 0;
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 9d048fa2d902..3d56fe7570da 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -176,6 +176,9 @@ extern struct ctl_table random_table[];
#ifdef CONFIG_INOTIFY_USER
extern struct ctl_table inotify_table[];
#endif
+#ifdef CONFIG_EPOLL
+extern struct ctl_table epoll_table[];
+#endif
#ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
int sysctl_legacy_va_layout;
@@ -1325,6 +1328,13 @@ static struct ctl_table fs_table[] = {
.child = inotify_table,
},
#endif
+#ifdef CONFIG_EPOLL
+ {
+ .procname = "epoll",
+ .mode = 0555,
+ .child = epoll_table,
+ },
+#endif
#endif
{
.ctl_name = KERN_SETUID_DUMPABLE,
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index f780e9552f91..668bbb5ef2bd 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -1215,7 +1215,7 @@ ring_buffer_lock_reserve(struct ring_buffer *buffer,
out:
if (resched)
- preempt_enable_notrace();
+ preempt_enable_no_resched_notrace();
else
preempt_enable_notrace();
return NULL;
diff --git a/kernel/trace/trace_mmiotrace.c b/kernel/trace/trace_mmiotrace.c
index f28484618ff0..e62cbf78eab6 100644
--- a/kernel/trace/trace_mmiotrace.c
+++ b/kernel/trace/trace_mmiotrace.c
@@ -18,12 +18,14 @@ struct header_iter {
static struct trace_array *mmio_trace_array;
static bool overrun_detected;
+static unsigned long prev_overruns;
static void mmio_reset_data(struct trace_array *tr)
{
int cpu;
overrun_detected = false;
+ prev_overruns = 0;
tr->time_start = ftrace_now(tr->cpu);
for_each_online_cpu(cpu)
@@ -128,16 +130,12 @@ static void mmio_close(struct trace_iterator *iter)
static unsigned long count_overruns(struct trace_iterator *iter)
{
- int cpu;
unsigned long cnt = 0;
-/* FIXME: */
-#if 0
- for_each_online_cpu(cpu) {
- cnt += iter->overrun[cpu];
- iter->overrun[cpu] = 0;
- }
-#endif
- (void)cpu;
+ unsigned long over = ring_buffer_overruns(iter->tr->buffer);
+
+ if (over > prev_overruns)
+ cnt = over - prev_overruns;
+ prev_overruns = over;
return cnt;
}
diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c
index be682b62fe58..3bdb44bde4b7 100644
--- a/kernel/trace/trace_stack.c
+++ b/kernel/trace/trace_stack.c
@@ -184,11 +184,16 @@ static struct file_operations stack_max_size_fops = {
static void *
t_next(struct seq_file *m, void *v, loff_t *pos)
{
- long i = (long)m->private;
+ long i;
(*pos)++;
- i++;
+ if (v == SEQ_START_TOKEN)
+ i = 0;
+ else {
+ i = *(long *)v;
+ i++;
+ }
if (i >= max_stack_trace.nr_entries ||
stack_dump_trace[i] == ULONG_MAX)
@@ -201,12 +206,15 @@ t_next(struct seq_file *m, void *v, loff_t *pos)
static void *t_start(struct seq_file *m, loff_t *pos)
{
- void *t = &m->private;
+ void *t = SEQ_START_TOKEN;
loff_t l = 0;
local_irq_disable();
__raw_spin_lock(&max_stack_lock);
+ if (*pos == 0)
+ return SEQ_START_TOKEN;
+
for (; t && l < *pos; t = t_next(m, t, &l))
;
@@ -235,10 +243,10 @@ static int trace_lookup_stack(struct seq_file *m, long i)
static int t_show(struct seq_file *m, void *v)
{
- long i = *(long *)v;
+ long i;
int size;
- if (i < 0) {
+ if (v == SEQ_START_TOKEN) {
seq_printf(m, " Depth Size Location"
" (%d entries)\n"
" ----- ---- --------\n",
@@ -246,6 +254,8 @@ static int t_show(struct seq_file *m, void *v)
return 0;
}
+ i = *(long *)v;
+
if (i >= max_stack_trace.nr_entries ||
stack_dump_trace[i] == ULONG_MAX)
return 0;
@@ -275,10 +285,6 @@ static int stack_trace_open(struct inode *inode, struct file *file)
int ret;
ret = seq_open(file, &stack_trace_seq_ops);
- if (!ret) {
- struct seq_file *m = file->private_data;
- m->private = (void *)-1;
- }
return ret;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 02:05:09 +0100