summaryrefslogtreecommitdiff
path: root/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'kernel')
-rw-r--r--kernel/exit.c2
-rw-r--r--kernel/hrtimer.c10
-rw-r--r--kernel/irq/proc.c2
-rw-r--r--kernel/kexec.c7
-rw-r--r--kernel/power/hibernate.c10
-rw-r--r--kernel/power/suspend.c5
-rw-r--r--kernel/ptrace.c17
-rw-r--r--kernel/time/posix-clock.c24
-rw-r--r--kernel/trace/Kconfig2
-rw-r--r--kernel/trace/trace.c1
-rw-r--r--kernel/trace/trace_events.c1
-rw-r--r--kernel/watchdog.c5
-rw-r--r--kernel/workqueue.c8
13 files changed, 66 insertions, 28 deletions
diff --git a/kernel/exit.c b/kernel/exit.c
index f5d2f63bae0b..8dd874181542 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -1016,7 +1016,7 @@ NORET_TYPE void do_exit(long code)
/*
* FIXME: do that only when needed, using sched_exit tracepoint
*/
- flush_ptrace_hw_breakpoint(tsk);
+ ptrace_put_breakpoints(tsk);
exit_notify(tsk, group_dead);
#ifdef CONFIG_NUMA
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 9017478c5d4c..87fdb3f8db14 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -81,7 +81,11 @@ DEFINE_PER_CPU(struct hrtimer_cpu_base, hrtimer_bases) =
}
};
-static int hrtimer_clock_to_base_table[MAX_CLOCKS];
+static int hrtimer_clock_to_base_table[MAX_CLOCKS] = {
+ [CLOCK_REALTIME] = HRTIMER_BASE_REALTIME,
+ [CLOCK_MONOTONIC] = HRTIMER_BASE_MONOTONIC,
+ [CLOCK_BOOTTIME] = HRTIMER_BASE_BOOTTIME,
+};
static inline int hrtimer_clockid_to_base(clockid_t clock_id)
{
@@ -1722,10 +1726,6 @@ static struct notifier_block __cpuinitdata hrtimers_nb = {
void __init hrtimers_init(void)
{
- hrtimer_clock_to_base_table[CLOCK_REALTIME] = HRTIMER_BASE_REALTIME;
- hrtimer_clock_to_base_table[CLOCK_MONOTONIC] = HRTIMER_BASE_MONOTONIC;
- hrtimer_clock_to_base_table[CLOCK_BOOTTIME] = HRTIMER_BASE_BOOTTIME;
-
hrtimer_cpu_notify(&hrtimers_nb, (unsigned long)CPU_UP_PREPARE,
(void *)(long)smp_processor_id());
register_cpu_notifier(&hrtimers_nb);
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index dd201bd35103..834899f2500f 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -419,7 +419,7 @@ int show_interrupts(struct seq_file *p, void *v)
} else {
seq_printf(p, " %8s", "None");
}
-#ifdef CONFIG_GENIRC_IRQ_SHOW_LEVEL
+#ifdef CONFIG_GENERIC_IRQ_SHOW_LEVEL
seq_printf(p, " %-8s", irqd_is_level_type(&desc->irq_data) ? "Level" : "Edge");
#endif
if (desc->name)
diff --git a/kernel/kexec.c b/kernel/kexec.c
index 55936f9cb251..87b77de03dd3 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -33,6 +33,7 @@
#include <linux/vmalloc.h>
#include <linux/swap.h>
#include <linux/kmsg_dump.h>
+#include <linux/syscore_ops.h>
#include <asm/page.h>
#include <asm/uaccess.h>
@@ -1532,6 +1533,11 @@ int kernel_kexec(void)
local_irq_disable();
/* Suspend system devices */
error = sysdev_suspend(PMSG_FREEZE);
+ if (!error) {
+ error = syscore_suspend();
+ if (error)
+ sysdev_resume();
+ }
if (error)
goto Enable_irqs;
} else
@@ -1546,6 +1552,7 @@ int kernel_kexec(void)
#ifdef CONFIG_KEXEC_JUMP
if (kexec_image->preserve_context) {
+ syscore_resume();
sysdev_resume();
Enable_irqs:
local_irq_enable();
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index aeabd26e3342..50aae660174d 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -273,8 +273,11 @@ static int create_image(int platform_mode)
local_irq_disable();
error = sysdev_suspend(PMSG_FREEZE);
- if (!error)
+ if (!error) {
error = syscore_suspend();
+ if (error)
+ sysdev_resume();
+ }
if (error) {
printk(KERN_ERR "PM: Some system devices failed to power down, "
"aborting hibernation\n");
@@ -407,8 +410,11 @@ static int resume_target_kernel(bool platform_mode)
local_irq_disable();
error = sysdev_suspend(PMSG_QUIESCE);
- if (!error)
+ if (!error) {
error = syscore_suspend();
+ if (error)
+ sysdev_resume();
+ }
if (error)
goto Enable_irqs;
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index 2814c32aed51..8935369d503a 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -164,8 +164,11 @@ static int suspend_enter(suspend_state_t state)
BUG_ON(!irqs_disabled());
error = sysdev_suspend(PMSG_SUSPEND);
- if (!error)
+ if (!error) {
error = syscore_suspend();
+ if (error)
+ sysdev_resume();
+ }
if (!error) {
if (!(suspend_test(TEST_CORE) || pm_wakeup_pending())) {
error = suspend_ops->enter(state);
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 0fc1eed28d27..dc7ab65f3b36 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -22,6 +22,7 @@
#include <linux/syscalls.h>
#include <linux/uaccess.h>
#include <linux/regset.h>
+#include <linux/hw_breakpoint.h>
/*
@@ -879,3 +880,19 @@ asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
return ret;
}
#endif /* CONFIG_COMPAT */
+
+#ifdef CONFIG_HAVE_HW_BREAKPOINT
+int ptrace_get_breakpoints(struct task_struct *tsk)
+{
+ if (atomic_inc_not_zero(&tsk->ptrace_bp_refcnt))
+ return 0;
+
+ return -1;
+}
+
+void ptrace_put_breakpoints(struct task_struct *tsk)
+{
+ if (atomic_dec_and_test(&tsk->ptrace_bp_refcnt))
+ flush_ptrace_hw_breakpoint(tsk);
+}
+#endif /* CONFIG_HAVE_HW_BREAKPOINT */
diff --git a/kernel/time/posix-clock.c b/kernel/time/posix-clock.c
index 25028dd4fa18..c340ca658f37 100644
--- a/kernel/time/posix-clock.c
+++ b/kernel/time/posix-clock.c
@@ -19,7 +19,6 @@
*/
#include <linux/device.h>
#include <linux/file.h>
-#include <linux/mutex.h>
#include <linux/posix-clock.h>
#include <linux/slab.h>
#include <linux/syscalls.h>
@@ -34,19 +33,19 @@ static struct posix_clock *get_posix_clock(struct file *fp)
{
struct posix_clock *clk = fp->private_data;
- mutex_lock(&clk->mutex);
+ down_read(&clk->rwsem);
if (!clk->zombie)
return clk;
- mutex_unlock(&clk->mutex);
+ up_read(&clk->rwsem);
return NULL;
}
static void put_posix_clock(struct posix_clock *clk)
{
- mutex_unlock(&clk->mutex);
+ up_read(&clk->rwsem);
}
static ssize_t posix_clock_read(struct file *fp, char __user *buf,
@@ -156,7 +155,7 @@ static int posix_clock_open(struct inode *inode, struct file *fp)
struct posix_clock *clk =
container_of(inode->i_cdev, struct posix_clock, cdev);
- mutex_lock(&clk->mutex);
+ down_read(&clk->rwsem);
if (clk->zombie) {
err = -ENODEV;
@@ -172,7 +171,7 @@ static int posix_clock_open(struct inode *inode, struct file *fp)
fp->private_data = clk;
}
out:
- mutex_unlock(&clk->mutex);
+ up_read(&clk->rwsem);
return err;
}
@@ -211,25 +210,20 @@ int posix_clock_register(struct posix_clock *clk, dev_t devid)
int err;
kref_init(&clk->kref);
- mutex_init(&clk->mutex);
+ init_rwsem(&clk->rwsem);
cdev_init(&clk->cdev, &posix_clock_file_operations);
clk->cdev.owner = clk->ops.owner;
err = cdev_add(&clk->cdev, devid, 1);
- if (err)
- goto no_cdev;
return err;
-no_cdev:
- mutex_destroy(&clk->mutex);
- return err;
}
EXPORT_SYMBOL_GPL(posix_clock_register);
static void delete_clock(struct kref *kref)
{
struct posix_clock *clk = container_of(kref, struct posix_clock, kref);
- mutex_destroy(&clk->mutex);
+
if (clk->release)
clk->release(clk);
}
@@ -238,9 +232,9 @@ void posix_clock_unregister(struct posix_clock *clk)
{
cdev_del(&clk->cdev);
- mutex_lock(&clk->mutex);
+ down_write(&clk->rwsem);
clk->zombie = true;
- mutex_unlock(&clk->mutex);
+ up_write(&clk->rwsem);
kref_put(&clk->kref, delete_clock);
}
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 61d7d59f4a1a..2ad39e556cb4 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -141,7 +141,7 @@ if FTRACE
config FUNCTION_TRACER
bool "Kernel Function Tracer"
depends on HAVE_FUNCTION_TRACER
- select FRAME_POINTER if !ARM_UNWIND && !S390
+ select FRAME_POINTER if !ARM_UNWIND && !S390 && !MICROBLAZE
select KALLSYMS
select GENERIC_TRACER
select CONTEXT_SWITCH_TRACER
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index d38c16a06a6f..1cb49be7c7fb 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -1110,6 +1110,7 @@ tracing_generic_entry_update(struct trace_entry *entry, unsigned long flags,
entry->preempt_count = pc & 0xff;
entry->pid = (tsk) ? tsk->pid : 0;
+ entry->padding = 0;
entry->flags =
#ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
(irqs_disabled_flags(flags) ? TRACE_FLAG_IRQS_OFF : 0) |
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index e88f74fe1d4c..2fe110341359 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -116,6 +116,7 @@ static int trace_define_common_fields(void)
__common_field(unsigned char, flags);
__common_field(unsigned char, preempt_count);
__common_field(int, pid);
+ __common_field(int, padding);
return ret;
}
diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 140dce750450..14733d4d156b 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -430,9 +430,12 @@ static int watchdog_enable(int cpu)
p = kthread_create(watchdog, (void *)(unsigned long)cpu, "watchdog/%d", cpu);
if (IS_ERR(p)) {
printk(KERN_ERR "softlockup watchdog for %i failed\n", cpu);
- if (!err)
+ if (!err) {
/* if hardlockup hasn't already set this */
err = PTR_ERR(p);
+ /* and disable the perf event */
+ watchdog_nmi_disable(cpu);
+ }
goto out;
}
kthread_bind(p, cpu);
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 8859a41806dd..e3378e8d3a5c 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -1291,8 +1291,14 @@ __acquires(&gcwq->lock)
return true;
spin_unlock_irq(&gcwq->lock);
- /* CPU has come up in between, retry migration */
+ /*
+ * We've raced with CPU hot[un]plug. Give it a breather
+ * and retry migration. cond_resched() is required here;
+ * otherwise, we might deadlock against cpu_stop trying to
+ * bring down the CPU on non-preemptive kernel.
+ */
cpu_relax();
+ cond_resched();
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 08:20:09 +0000