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-rw-r--r--kernel/acct.c2
-rw-r--r--kernel/cgroup.c15
-rw-r--r--kernel/configs.c2
-rw-r--r--kernel/cpuset.c15
-rw-r--r--kernel/events/core.c8
-rw-r--r--kernel/exit.c2
-rw-r--r--kernel/fork.c5
-rw-r--r--kernel/futex.c46
-rw-r--r--kernel/irq/proc.c20
-rw-r--r--kernel/nsproxy.c6
-rw-r--r--kernel/pid.c1
-rw-r--r--kernel/pid_namespace.c2
-rw-r--r--kernel/printk.c80
-rw-r--r--kernel/profile.c6
-rw-r--r--kernel/sched/stats.c7
-rw-r--r--kernel/signal.c5
-rw-r--r--kernel/smpboot.c4
-rw-r--r--kernel/softirq.c21
-rw-r--r--kernel/stop_machine.c2
-rw-r--r--kernel/sys.c57
-rw-r--r--kernel/time/tick-broadcast.c3
-rw-r--r--kernel/trace/Kconfig24
-rw-r--r--kernel/trace/ftrace.c4
-rw-r--r--kernel/trace/trace.c86
-rw-r--r--kernel/trace/trace.h6
-rw-r--r--kernel/trace/trace_irqsoff.c19
-rw-r--r--kernel/trace/trace_sched_wakeup.c18
-rw-r--r--kernel/user.c2
-rw-r--r--kernel/user_namespace.c6
-rw-r--r--kernel/utsname.c2
-rw-r--r--kernel/workqueue.c51
31 files changed, 302 insertions, 225 deletions
diff --git a/kernel/acct.c b/kernel/acct.c
index b9bd7f098ee..85389fe2abd 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -543,6 +543,7 @@ static void do_acct_process(struct bsd_acct_struct *acct,
* Kernel segment override to datasegment and write it
* to the accounting file.
*/
+ file_start_write(file);
fs = get_fs();
set_fs(KERNEL_DS);
/*
@@ -554,6 +555,7 @@ static void do_acct_process(struct bsd_acct_struct *acct,
sizeof(acct_t), &file->f_pos);
current->signal->rlim[RLIMIT_FSIZE].rlim_cur = flim;
set_fs(fs);
+ file_end_write(file);
out:
revert_creds(orig_cred);
}
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index a32f9432666..d5cffe80b46 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -4769,7 +4769,7 @@ out:
*/
/* TODO: Use a proper seq_file iterator */
-static int proc_cgroup_show(struct seq_file *m, void *v)
+int proc_cgroup_show(struct seq_file *m, void *v)
{
struct pid *pid;
struct task_struct *tsk;
@@ -4821,19 +4821,6 @@ out:
return retval;
}
-static int cgroup_open(struct inode *inode, struct file *file)
-{
- struct pid *pid = PROC_I(inode)->pid;
- return single_open(file, proc_cgroup_show, pid);
-}
-
-const struct file_operations proc_cgroup_operations = {
- .open = cgroup_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
/* Display information about each subsystem and each hierarchy */
static int proc_cgroupstats_show(struct seq_file *m, void *v)
{
diff --git a/kernel/configs.c b/kernel/configs.c
index 42e8fa075ee..c18b1f1ae51 100644
--- a/kernel/configs.c
+++ b/kernel/configs.c
@@ -79,7 +79,7 @@ static int __init ikconfig_init(void)
if (!entry)
return -ENOMEM;
- entry->size = kernel_config_data_size;
+ proc_set_size(entry, kernel_config_data_size);
return 0;
}
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 4f9dfe43ecb..1b6f615be58 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -2666,7 +2666,7 @@ void __cpuset_memory_pressure_bump(void)
* and we take cpuset_mutex, keeping cpuset_attach() from changing it
* anyway.
*/
-static int proc_cpuset_show(struct seq_file *m, void *unused_v)
+int proc_cpuset_show(struct seq_file *m, void *unused_v)
{
struct pid *pid;
struct task_struct *tsk;
@@ -2700,19 +2700,6 @@ out_free:
out:
return retval;
}
-
-static int cpuset_open(struct inode *inode, struct file *file)
-{
- struct pid *pid = PROC_I(inode)->pid;
- return single_open(file, proc_cpuset_show, pid);
-}
-
-const struct file_operations proc_cpuset_operations = {
- .open = cpuset_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
#endif /* CONFIG_PROC_PID_CPUSET */
/* Display task mems_allowed in /proc/<pid>/status file. */
diff --git a/kernel/events/core.c b/kernel/events/core.c
index b0cd86501c3..59412d037ee 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -4434,12 +4434,15 @@ static void perf_event_task_event(struct perf_task_event *task_event)
if (ctxn < 0)
goto next;
ctx = rcu_dereference(current->perf_event_ctxp[ctxn]);
+ if (ctx)
+ perf_event_task_ctx(ctx, task_event);
}
- if (ctx)
- perf_event_task_ctx(ctx, task_event);
next:
put_cpu_ptr(pmu->pmu_cpu_context);
}
+ if (task_event->task_ctx)
+ perf_event_task_ctx(task_event->task_ctx, task_event);
+
rcu_read_unlock();
}
@@ -5647,6 +5650,7 @@ static void perf_swevent_init_hrtimer(struct perf_event *event)
event->attr.sample_period = NSEC_PER_SEC / freq;
hwc->sample_period = event->attr.sample_period;
local64_set(&hwc->period_left, hwc->sample_period);
+ hwc->last_period = hwc->sample_period;
event->attr.freq = 0;
}
}
diff --git a/kernel/exit.c b/kernel/exit.c
index 51e485ca993..cd9e9e799bd 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -847,7 +847,7 @@ void do_exit(long code)
exit_io_context(tsk);
if (tsk->splice_pipe)
- __free_pipe_info(tsk->splice_pipe);
+ free_pipe_info(tsk->splice_pipe);
if (tsk->task_frag.page)
put_page(tsk->task_frag.page);
diff --git a/kernel/fork.c b/kernel/fork.c
index 8d932b1c905..1766d324d5e 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1141,6 +1141,9 @@ static struct task_struct *copy_process(unsigned long clone_flags,
if ((clone_flags & (CLONE_NEWNS|CLONE_FS)) == (CLONE_NEWNS|CLONE_FS))
return ERR_PTR(-EINVAL);
+ if ((clone_flags & (CLONE_NEWUSER|CLONE_FS)) == (CLONE_NEWUSER|CLONE_FS))
+ return ERR_PTR(-EINVAL);
+
/*
* Thread groups must share signals as well, and detached threads
* can only be started up within the thread group.
@@ -1807,7 +1810,7 @@ SYSCALL_DEFINE1(unshare, unsigned long, unshare_flags)
* If unsharing a user namespace must also unshare the thread.
*/
if (unshare_flags & CLONE_NEWUSER)
- unshare_flags |= CLONE_THREAD;
+ unshare_flags |= CLONE_THREAD | CLONE_FS;
/*
* If unsharing a pid namespace must also unshare the thread.
*/
diff --git a/kernel/futex.c b/kernel/futex.c
index f0090a993da..b26dcfc02c9 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -223,7 +223,8 @@ static void drop_futex_key_refs(union futex_key *key)
* @rw: mapping needs to be read/write (values: VERIFY_READ,
* VERIFY_WRITE)
*
- * Returns a negative error code or 0
+ * Return: a negative error code or 0
+ *
* The key words are stored in *key on success.
*
* For shared mappings, it's (page->index, file_inode(vma->vm_file),
@@ -705,9 +706,9 @@ lookup_pi_state(u32 uval, struct futex_hash_bucket *hb,
* be "current" except in the case of requeue pi.
* @set_waiters: force setting the FUTEX_WAITERS bit (1) or not (0)
*
- * Returns:
- * 0 - ready to wait
- * 1 - acquired the lock
+ * Return:
+ * 0 - ready to wait;
+ * 1 - acquired the lock;
* <0 - error
*
* The hb->lock and futex_key refs shall be held by the caller.
@@ -1191,9 +1192,9 @@ void requeue_pi_wake_futex(struct futex_q *q, union futex_key *key,
* then direct futex_lock_pi_atomic() to force setting the FUTEX_WAITERS bit.
* hb1 and hb2 must be held by the caller.
*
- * Returns:
- * 0 - failed to acquire the lock atomicly
- * 1 - acquired the lock
+ * Return:
+ * 0 - failed to acquire the lock atomically;
+ * 1 - acquired the lock;
* <0 - error
*/
static int futex_proxy_trylock_atomic(u32 __user *pifutex,
@@ -1254,8 +1255,8 @@ static int futex_proxy_trylock_atomic(u32 __user *pifutex,
* Requeue waiters on uaddr1 to uaddr2. In the requeue_pi case, try to acquire
* uaddr2 atomically on behalf of the top waiter.
*
- * Returns:
- * >=0 - on success, the number of tasks requeued or woken
+ * Return:
+ * >=0 - on success, the number of tasks requeued or woken;
* <0 - on error
*/
static int futex_requeue(u32 __user *uaddr1, unsigned int flags,
@@ -1536,8 +1537,8 @@ static inline void queue_me(struct futex_q *q, struct futex_hash_bucket *hb)
* The q->lock_ptr must not be held by the caller. A call to unqueue_me() must
* be paired with exactly one earlier call to queue_me().
*
- * Returns:
- * 1 - if the futex_q was still queued (and we removed unqueued it)
+ * Return:
+ * 1 - if the futex_q was still queued (and we removed unqueued it);
* 0 - if the futex_q was already removed by the waking thread
*/
static int unqueue_me(struct futex_q *q)
@@ -1707,9 +1708,9 @@ static long futex_wait_restart(struct restart_block *restart);
* the pi_state owner as well as handle race conditions that may allow us to
* acquire the lock. Must be called with the hb lock held.
*
- * Returns:
- * 1 - success, lock taken
- * 0 - success, lock not taken
+ * Return:
+ * 1 - success, lock taken;
+ * 0 - success, lock not taken;
* <0 - on error (-EFAULT)
*/
static int fixup_owner(u32 __user *uaddr, struct futex_q *q, int locked)
@@ -1824,8 +1825,8 @@ static void futex_wait_queue_me(struct futex_hash_bucket *hb, struct futex_q *q,
* Return with the hb lock held and a q.key reference on success, and unlocked
* with no q.key reference on failure.
*
- * Returns:
- * 0 - uaddr contains val and hb has been locked
+ * Return:
+ * 0 - uaddr contains val and hb has been locked;
* <1 - -EFAULT or -EWOULDBLOCK (uaddr does not contain val) and hb is unlocked
*/
static int futex_wait_setup(u32 __user *uaddr, u32 val, unsigned int flags,
@@ -2203,9 +2204,9 @@ pi_faulted:
* the wakeup and return the appropriate error code to the caller. Must be
* called with the hb lock held.
*
- * Returns
- * 0 - no early wakeup detected
- * <0 - -ETIMEDOUT or -ERESTARTNOINTR
+ * Return:
+ * 0 = no early wakeup detected;
+ * <0 = -ETIMEDOUT or -ERESTARTNOINTR
*/
static inline
int handle_early_requeue_pi_wakeup(struct futex_hash_bucket *hb,
@@ -2247,7 +2248,6 @@ int handle_early_requeue_pi_wakeup(struct futex_hash_bucket *hb,
* @val: the expected value of uaddr
* @abs_time: absolute timeout
* @bitset: 32 bit wakeup bitset set by userspace, defaults to all
- * @clockrt: whether to use CLOCK_REALTIME (1) or CLOCK_MONOTONIC (0)
* @uaddr2: the pi futex we will take prior to returning to user-space
*
* The caller will wait on uaddr and will be requeued by futex_requeue() to
@@ -2258,7 +2258,7 @@ int handle_early_requeue_pi_wakeup(struct futex_hash_bucket *hb,
* there was a need to.
*
* We call schedule in futex_wait_queue_me() when we enqueue and return there
- * via the following:
+ * via the following--
* 1) wakeup on uaddr2 after an atomic lock acquisition by futex_requeue()
* 2) wakeup on uaddr2 after a requeue
* 3) signal
@@ -2276,8 +2276,8 @@ int handle_early_requeue_pi_wakeup(struct futex_hash_bucket *hb,
*
* If 4 or 7, we cleanup and return with -ETIMEDOUT.
*
- * Returns:
- * 0 - On success
+ * Return:
+ * 0 - On success;
* <0 - On error
*/
static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags,
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index 397db02209e..19ed5c425c3 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -76,7 +76,7 @@ static int irq_affinity_list_proc_show(struct seq_file *m, void *v)
static ssize_t write_irq_affinity(int type, struct file *file,
const char __user *buffer, size_t count, loff_t *pos)
{
- unsigned int irq = (int)(long)PDE(file_inode(file))->data;
+ unsigned int irq = (int)(long)PDE_DATA(file_inode(file));
cpumask_var_t new_value;
int err;
@@ -131,17 +131,17 @@ static ssize_t irq_affinity_list_proc_write(struct file *file,
static int irq_affinity_proc_open(struct inode *inode, struct file *file)
{
- return single_open(file, irq_affinity_proc_show, PDE(inode)->data);
+ return single_open(file, irq_affinity_proc_show, PDE_DATA(inode));
}
static int irq_affinity_list_proc_open(struct inode *inode, struct file *file)
{
- return single_open(file, irq_affinity_list_proc_show, PDE(inode)->data);
+ return single_open(file, irq_affinity_list_proc_show, PDE_DATA(inode));
}
static int irq_affinity_hint_proc_open(struct inode *inode, struct file *file)
{
- return single_open(file, irq_affinity_hint_proc_show, PDE(inode)->data);
+ return single_open(file, irq_affinity_hint_proc_show, PDE_DATA(inode));
}
static const struct file_operations irq_affinity_proc_fops = {
@@ -212,7 +212,7 @@ out:
static int default_affinity_open(struct inode *inode, struct file *file)
{
- return single_open(file, default_affinity_show, PDE(inode)->data);
+ return single_open(file, default_affinity_show, PDE_DATA(inode));
}
static const struct file_operations default_affinity_proc_fops = {
@@ -233,7 +233,7 @@ static int irq_node_proc_show(struct seq_file *m, void *v)
static int irq_node_proc_open(struct inode *inode, struct file *file)
{
- return single_open(file, irq_node_proc_show, PDE(inode)->data);
+ return single_open(file, irq_node_proc_show, PDE_DATA(inode));
}
static const struct file_operations irq_node_proc_fops = {
@@ -256,7 +256,7 @@ static int irq_spurious_proc_show(struct seq_file *m, void *v)
static int irq_spurious_proc_open(struct inode *inode, struct file *file)
{
- return single_open(file, irq_spurious_proc_show, PDE(inode)->data);
+ return single_open(file, irq_spurious_proc_show, PDE_DATA(inode));
}
static const struct file_operations irq_spurious_proc_fops = {
@@ -366,11 +366,7 @@ void unregister_irq_proc(unsigned int irq, struct irq_desc *desc)
void unregister_handler_proc(unsigned int irq, struct irqaction *action)
{
- if (action->dir) {
- struct irq_desc *desc = irq_to_desc(irq);
-
- remove_proc_entry(action->dir->name, desc->dir);
- }
+ proc_remove(action->dir);
}
static void register_default_affinity_proc(void)
diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c
index afc0456f227..364ceab15f0 100644
--- a/kernel/nsproxy.c
+++ b/kernel/nsproxy.c
@@ -22,7 +22,7 @@
#include <linux/pid_namespace.h>
#include <net/net_namespace.h>
#include <linux/ipc_namespace.h>
-#include <linux/proc_fs.h>
+#include <linux/proc_ns.h>
#include <linux/file.h>
#include <linux/syscalls.h>
@@ -241,7 +241,7 @@ SYSCALL_DEFINE2(setns, int, fd, int, nstype)
const struct proc_ns_operations *ops;
struct task_struct *tsk = current;
struct nsproxy *new_nsproxy;
- struct proc_inode *ei;
+ struct proc_ns *ei;
struct file *file;
int err;
@@ -250,7 +250,7 @@ SYSCALL_DEFINE2(setns, int, fd, int, nstype)
return PTR_ERR(file);
err = -EINVAL;
- ei = PROC_I(file_inode(file));
+ ei = get_proc_ns(file_inode(file));
ops = ei->ns_ops;
if (nstype && (ops->type != nstype))
goto out;
diff --git a/kernel/pid.c b/kernel/pid.c
index 047dc626463..686255e2c39 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -36,6 +36,7 @@
#include <linux/pid_namespace.h>
#include <linux/init_task.h>
#include <linux/syscalls.h>
+#include <linux/proc_ns.h>
#include <linux/proc_fs.h>
#define pid_hashfn(nr, ns) \
diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c
index c1c3dc1c602..4af28a84906 100644
--- a/kernel/pid_namespace.c
+++ b/kernel/pid_namespace.c
@@ -15,7 +15,7 @@
#include <linux/err.h>
#include <linux/acct.h>
#include <linux/slab.h>
-#include <linux/proc_fs.h>
+#include <linux/proc_ns.h>
#include <linux/reboot.h>
#include <linux/export.h>
diff --git a/kernel/printk.c b/kernel/printk.c
index 0b31715f335..abbdd9e2ac8 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -63,8 +63,6 @@ void asmlinkage __attribute__((weak)) early_printk(const char *fmt, ...)
#define MINIMUM_CONSOLE_LOGLEVEL 1 /* Minimum loglevel we let people use */
#define DEFAULT_CONSOLE_LOGLEVEL 7 /* anything MORE serious than KERN_DEBUG */
-DECLARE_WAIT_QUEUE_HEAD(log_wait);
-
int console_printk[4] = {
DEFAULT_CONSOLE_LOGLEVEL, /* console_loglevel */
DEFAULT_MESSAGE_LOGLEVEL, /* default_message_loglevel */
@@ -224,6 +222,7 @@ struct log {
static DEFINE_RAW_SPINLOCK(logbuf_lock);
#ifdef CONFIG_PRINTK
+DECLARE_WAIT_QUEUE_HEAD(log_wait);
/* the next printk record to read by syslog(READ) or /proc/kmsg */
static u64 syslog_seq;
static u32 syslog_idx;
@@ -1957,45 +1956,6 @@ int is_console_locked(void)
return console_locked;
}
-/*
- * Delayed printk version, for scheduler-internal messages:
- */
-#define PRINTK_BUF_SIZE 512
-
-#define PRINTK_PENDING_WAKEUP 0x01
-#define PRINTK_PENDING_SCHED 0x02
-
-static DEFINE_PER_CPU(int, printk_pending);
-static DEFINE_PER_CPU(char [PRINTK_BUF_SIZE], printk_sched_buf);
-
-static void wake_up_klogd_work_func(struct irq_work *irq_work)
-{
- int pending = __this_cpu_xchg(printk_pending, 0);
-
- if (pending & PRINTK_PENDING_SCHED) {
- char *buf = __get_cpu_var(printk_sched_buf);
- printk(KERN_WARNING "[sched_delayed] %s", buf);
- }
-
- if (pending & PRINTK_PENDING_WAKEUP)
- wake_up_interruptible(&log_wait);
-}
-
-static DEFINE_PER_CPU(struct irq_work, wake_up_klogd_work) = {
- .func = wake_up_klogd_work_func,
- .flags = IRQ_WORK_LAZY,
-};
-
-void wake_up_klogd(void)
-{
- preempt_disable();
- if (waitqueue_active(&log_wait)) {
- this_cpu_or(printk_pending, PRINTK_PENDING_WAKEUP);
- irq_work_queue(&__get_cpu_var(wake_up_klogd_work));
- }
- preempt_enable();
-}
-
static void console_cont_flush(char *text, size_t size)
{
unsigned long flags;
@@ -2458,6 +2418,44 @@ static int __init printk_late_init(void)
late_initcall(printk_late_init);
#if defined CONFIG_PRINTK
+/*
+ * Delayed printk version, for scheduler-internal messages:
+ */
+#define PRINTK_BUF_SIZE 512
+
+#define PRINTK_PENDING_WAKEUP 0x01
+#define PRINTK_PENDING_SCHED 0x02
+
+static DEFINE_PER_CPU(int, printk_pending);
+static DEFINE_PER_CPU(char [PRINTK_BUF_SIZE], printk_sched_buf);
+
+static void wake_up_klogd_work_func(struct irq_work *irq_work)
+{
+ int pending = __this_cpu_xchg(printk_pending, 0);
+
+ if (pending & PRINTK_PENDING_SCHED) {
+ char *buf = __get_cpu_var(printk_sched_buf);
+ printk(KERN_WARNING "[sched_delayed] %s", buf);
+ }
+
+ if (pending & PRINTK_PENDING_WAKEUP)
+ wake_up_interruptible(&log_wait);
+}
+
+static DEFINE_PER_CPU(struct irq_work, wake_up_klogd_work) = {
+ .func = wake_up_klogd_work_func,
+ .flags = IRQ_WORK_LAZY,
+};
+
+void wake_up_klogd(void)
+{
+ preempt_disable();
+ if (waitqueue_active(&log_wait)) {
+ this_cpu_or(printk_pending, PRINTK_PENDING_WAKEUP);
+ irq_work_queue(&__get_cpu_var(wake_up_klogd_work));
+ }
+ preempt_enable();
+}
int printk_sched(const char *fmt, ...)
{
diff --git a/kernel/profile.c b/kernel/profile.c
index dc3384ee874..0bf40073766 100644
--- a/kernel/profile.c
+++ b/kernel/profile.c
@@ -462,10 +462,10 @@ static const struct file_operations prof_cpu_mask_proc_fops = {
.write = prof_cpu_mask_proc_write,
};
-void create_prof_cpu_mask(struct proc_dir_entry *root_irq_dir)
+void create_prof_cpu_mask(void)
{
/* create /proc/irq/prof_cpu_mask */
- proc_create("prof_cpu_mask", 0600, root_irq_dir, &prof_cpu_mask_proc_fops);
+ proc_create("irq/prof_cpu_mask", 0600, NULL, &prof_cpu_mask_proc_fops);
}
/*
@@ -600,7 +600,7 @@ int __ref create_proc_profile(void) /* false positive from hotcpu_notifier */
NULL, &proc_profile_operations);
if (!entry)
return 0;
- entry->size = (1+prof_len) * sizeof(atomic_t);
+ proc_set_size(entry, (1 + prof_len) * sizeof(atomic_t));
hotcpu_notifier(profile_cpu_callback, 0);
return 0;
}
diff --git a/kernel/sched/stats.c b/kernel/sched/stats.c
index e036eda1a9c..da98af347e8 100644
--- a/kernel/sched/stats.c
+++ b/kernel/sched/stats.c
@@ -130,16 +130,11 @@ static int schedstat_open(struct inode *inode, struct file *file)
return seq_open(file, &schedstat_sops);
}
-static int schedstat_release(struct inode *inode, struct file *file)
-{
- return 0;
-};
-
static const struct file_operations proc_schedstat_operations = {
.open = schedstat_open,
.read = seq_read,
.llseek = seq_lseek,
- .release = schedstat_release,
+ .release = seq_release,
};
static int __init proc_schedstat_init(void)
diff --git a/kernel/signal.c b/kernel/signal.c
index 2ec870a4c3c..dd72567767d 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -485,6 +485,9 @@ flush_signal_handlers(struct task_struct *t, int force_default)
if (force_default || ka->sa.sa_handler != SIG_IGN)
ka->sa.sa_handler = SIG_DFL;
ka->sa.sa_flags = 0;
+#ifdef __ARCH_HAS_SA_RESTORER
+ ka->sa.sa_restorer = NULL;
+#endif
sigemptyset(&ka->sa.sa_mask);
ka++;
}
@@ -2682,7 +2685,7 @@ static int do_sigpending(void *set, unsigned long sigsetsize)
/**
* sys_rt_sigpending - examine a pending signal that has been raised
* while blocked
- * @set: stores pending signals
+ * @uset: stores pending signals
* @sigsetsize: size of sigset_t type or larger
*/
SYSCALL_DEFINE2(rt_sigpending, sigset_t __user *, uset, size_t, sigsetsize)
diff --git a/kernel/smpboot.c b/kernel/smpboot.c
index b9bde572782..8eaed9aa9cf 100644
--- a/kernel/smpboot.c
+++ b/kernel/smpboot.c
@@ -131,7 +131,7 @@ static int smpboot_thread_fn(void *data)
continue;
}
- //BUG_ON(td->cpu != smp_processor_id());
+ BUG_ON(td->cpu != smp_processor_id());
/* Check for state change setup */
switch (td->status) {
@@ -209,6 +209,8 @@ static void smpboot_unpark_thread(struct smp_hotplug_thread *ht, unsigned int cp
{
struct task_struct *tsk = *per_cpu_ptr(ht->store, cpu);
+ if (ht->pre_unpark)
+ ht->pre_unpark(cpu);
kthread_unpark(tsk);
}
diff --git a/kernel/softirq.c b/kernel/softirq.c
index b4d252fd195..14d7758074a 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -323,18 +323,10 @@ void irq_enter(void)
static inline void invoke_softirq(void)
{
- if (!force_irqthreads) {
-#ifdef __ARCH_IRQ_EXIT_IRQS_DISABLED
+ if (!force_irqthreads)
__do_softirq();
-#else
- do_softirq();
-#endif
- } else {
- __local_bh_disable((unsigned long)__builtin_return_address(0),
- SOFTIRQ_OFFSET);
+ else
wakeup_softirqd();
- __local_bh_enable(SOFTIRQ_OFFSET);
- }
}
/*
@@ -342,9 +334,15 @@ static inline void invoke_softirq(void)
*/
void irq_exit(void)
{
+#ifndef __ARCH_IRQ_EXIT_IRQS_DISABLED
+ local_irq_disable();
+#else
+ WARN_ON_ONCE(!irqs_disabled());
+#endif
+
account_irq_exit_time(current);
trace_hardirq_exit();
- sub_preempt_count(IRQ_EXIT_OFFSET);
+ sub_preempt_count(HARDIRQ_OFFSET);
if (!in_interrupt() && local_softirq_pending())
invoke_softirq();
@@ -354,7 +352,6 @@ void irq_exit(void)
tick_nohz_irq_exit();
#endif
rcu_irq_exit();
- sched_preempt_enable_no_resched();
}
/*
diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c
index 95d178c62d5..c09f2955ae3 100644
--- a/kernel/stop_machine.c
+++ b/kernel/stop_machine.c
@@ -336,7 +336,7 @@ static struct smp_hotplug_thread cpu_stop_threads = {
.create = cpu_stop_create,
.setup = cpu_stop_unpark,
.park = cpu_stop_park,
- .unpark = cpu_stop_unpark,
+ .pre_unpark = cpu_stop_unpark,
.selfparking = true,
};
diff --git a/kernel/sys.c b/kernel/sys.c
index 81f56445fba..39c9c4a2949 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -2185,9 +2185,8 @@ SYSCALL_DEFINE3(getcpu, unsigned __user *, cpup, unsigned __user *, nodep,
char poweroff_cmd[POWEROFF_CMD_PATH_LEN] = "/sbin/poweroff";
-static int __orderly_poweroff(void)
+static int __orderly_poweroff(bool force)
{
- int argc;
char **argv;
static char *envp[] = {
"HOME=/",
@@ -2196,20 +2195,40 @@ static int __orderly_poweroff(void)
};
int ret;
- argv = argv_split(GFP_ATOMIC, poweroff_cmd, &argc);
- if (argv == NULL) {
+ argv = argv_split(GFP_KERNEL, poweroff_cmd, NULL);
+ if (argv) {
+ ret = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_EXEC);
+ argv_free(argv);
+ } else {
printk(KERN_WARNING "%s failed to allocate memory for \"%s\"\n",
- __func__, poweroff_cmd);
- return -ENOMEM;
+ __func__, poweroff_cmd);
+ ret = -ENOMEM;
}
- ret = call_usermodehelper_fns(argv[0], argv, envp, UMH_WAIT_EXEC,
- NULL, NULL, NULL);
- argv_free(argv);
+ if (ret && force) {
+ printk(KERN_WARNING "Failed to start orderly shutdown: "
+ "forcing the issue\n");
+ /*
+ * I guess this should try to kick off some daemon to sync and
+ * poweroff asap. Or not even bother syncing if we're doing an
+ * emergency shutdown?
+ */
+ emergency_sync();
+ kernel_power_off();
+ }
return ret;
}
+static bool poweroff_force;
+
+static void poweroff_work_func(struct work_struct *work)
+{
+ __orderly_poweroff(poweroff_force);
+}
+
+static DECLARE_WORK(poweroff_work, poweroff_work_func);
+
/**
* orderly_poweroff - Trigger an orderly system poweroff
* @force: force poweroff if command execution fails
@@ -2219,21 +2238,9 @@ static int __orderly_poweroff(void)
*/
int orderly_poweroff(bool force)
{
- int ret = __orderly_poweroff();
-
- if (ret && force) {
- printk(KERN_WARNING "Failed to start orderly shutdown: "
- "forcing the issue\n");
-
- /*
- * I guess this should try to kick off some daemon to sync and
- * poweroff asap. Or not even bother syncing if we're doing an
- * emergency shutdown?
- */
- emergency_sync();
- kernel_power_off();
- }
-
- return ret;
+ if (force) /* do not override the pending "true" */
+ poweroff_force = true;
+ schedule_work(&poweroff_work);
+ return 0;
}
EXPORT_SYMBOL_GPL(orderly_poweroff);
diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index 2fb8cb88df8..7f32fe0e52c 100644
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -67,7 +67,8 @@ static void tick_broadcast_start_periodic(struct clock_event_device *bc)
*/
int tick_check_broadcast_device(struct clock_event_device *dev)
{
- if ((tick_broadcast_device.evtdev &&
+ if ((dev->features & CLOCK_EVT_FEAT_DUMMY) ||
+ (tick_broadcast_device.evtdev &&
tick_broadcast_device.evtdev->rating >= dev->rating) ||
(dev->features & CLOCK_EVT_FEAT_C3STOP))
return 0;
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 192473b2279..fc382d6e276 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -414,24 +414,28 @@ config PROBE_EVENTS
def_bool n
config DYNAMIC_FTRACE
- bool "enable/disable ftrace tracepoints dynamically"
+ bool "enable/disable function tracing dynamically"
depends on FUNCTION_TRACER
depends on HAVE_DYNAMIC_FTRACE
default y
help
- This option will modify all the calls to ftrace dynamically
- (will patch them out of the binary image and replace them
- with a No-Op instruction) as they are called. A table is
- created to dynamically enable them again.
+ This option will modify all the calls to function tracing
+ dynamically (will patch them out of the binary image and
+ replace them with a No-Op instruction) on boot up. During
+ compile time, a table is made of all the locations that ftrace
+ can function trace, and this table is linked into the kernel
+ image. When this is enabled, functions can be individually
+ enabled, and the functions not enabled will not affect
+ performance of the system.
+
+ See the files in /sys/kernel/debug/tracing:
+ available_filter_functions
+ set_ftrace_filter
+ set_ftrace_notrace
This way a CONFIG_FUNCTION_TRACER kernel is slightly larger, but
otherwise has native performance as long as no tracing is active.
- The changes to the code are done by a kernel thread that
- wakes up once a second and checks to see if any ftrace calls
- were made. If so, it runs stop_machine (stops all CPUS)
- and modifies the code to jump over the call to ftrace.
-
config DYNAMIC_FTRACE_WITH_REGS
def_bool y
depends on DYNAMIC_FTRACE
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index ab25b88aae5..6893d5a2bf0 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -3104,8 +3104,8 @@ __unregister_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
continue;
}
- hlist_del(&entry->node);
- call_rcu(&entry->rcu, ftrace_free_entry_rcu);
+ hlist_del_rcu(&entry->node);
+ call_rcu_sched(&entry->rcu, ftrace_free_entry_rcu);
}
}
__disable_ftrace_function_probe();
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index c2e2c231037..4f1dade5698 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -704,7 +704,7 @@ __update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu)
void
update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu)
{
- struct ring_buffer *buf = tr->buffer;
+ struct ring_buffer *buf;
if (trace_stop_count)
return;
@@ -719,6 +719,7 @@ update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu)
arch_spin_lock(&ftrace_max_lock);
+ buf = tr->buffer;
tr->buffer = max_tr.buffer;
max_tr.buffer = buf;
@@ -2400,6 +2401,27 @@ static void test_ftrace_alive(struct seq_file *m)
seq_printf(m, "# MAY BE MISSING FUNCTION EVENTS\n");
}
+#ifdef CONFIG_TRACER_MAX_TRACE
+static void print_snapshot_help(struct seq_file *m, struct trace_iterator *iter)
+{
+ if (iter->trace->allocated_snapshot)
+ seq_printf(m, "#\n# * Snapshot is allocated *\n#\n");
+ else
+ seq_printf(m, "#\n# * Snapshot is freed *\n#\n");
+
+ seq_printf(m, "# Snapshot commands:\n");
+ seq_printf(m, "# echo 0 > snapshot : Clears and frees snapshot buffer\n");
+ seq_printf(m, "# echo 1 > snapshot : Allocates snapshot buffer, if not already allocated.\n");
+ seq_printf(m, "# Takes a snapshot of the main buffer.\n");
+ seq_printf(m, "# echo 2 > snapshot : Clears snapshot buffer (but does not allocate)\n");
+ seq_printf(m, "# (Doesn't have to be '2' works with any number that\n");
+ seq_printf(m, "# is not a '0' or '1')\n");
+}
+#else
+/* Should never be called */
+static inline void print_snapshot_help(struct seq_file *m, struct trace_iterator *iter) { }
+#endif
+
static int s_show(struct seq_file *m, void *v)
{
struct trace_iterator *iter = v;
@@ -2411,7 +2433,9 @@ static int s_show(struct seq_file *m, void *v)
seq_puts(m, "#\n");
test_ftrace_alive(m);
}
- if (iter->trace && iter->trace->print_header)
+ if (iter->snapshot && trace_empty(iter))
+ print_snapshot_help(m, iter);
+ else if (iter->trace && iter->trace->print_header)
iter->trace->print_header(m);
else
trace_default_header(m);
@@ -2857,11 +2881,25 @@ static int set_tracer_option(struct tracer *trace, char *cmp, int neg)
return -EINVAL;
}
-static void set_tracer_flags(unsigned int mask, int enabled)
+/* Some tracers require overwrite to stay enabled */
+int trace_keep_overwrite(struct tracer *tracer, u32 mask, int set)
+{
+ if (tracer->enabled && (mask & TRACE_ITER_OVERWRITE) && !set)
+ return -1;
+
+ return 0;
+}
+
+int set_tracer_flag(unsigned int mask, int enabled)
{
/* do nothing if flag is already set */
if (!!(trace_flags & mask) == !!enabled)
- return;
+ return 0;
+
+ /* Give the tracer a chance to approve the change */
+ if (current_trace->flag_changed)
+ if (current_trace->flag_changed(current_trace, mask, !!enabled))
+ return -EINVAL;
if (enabled)
trace_flags |= mask;
@@ -2871,18 +2909,24 @@ static void set_tracer_flags(unsigned int mask, int enabled)
if (mask == TRACE_ITER_RECORD_CMD)
trace_event_enable_cmd_record(enabled);
- if (mask == TRACE_ITER_OVERWRITE)
+ if (mask == TRACE_ITER_OVERWRITE) {
ring_buffer_change_overwrite(global_trace.buffer, enabled);
+#ifdef CONFIG_TRACER_MAX_TRACE
+ ring_buffer_change_overwrite(max_tr.buffer, enabled);
+#endif
+ }
if (mask == TRACE_ITER_PRINTK)
trace_printk_start_stop_comm(enabled);
+
+ return 0;
}
static int trace_set_options(char *option)
{
char *cmp;
int neg = 0;
- int ret = 0;
+ int ret = -ENODEV;
int i;
cmp = strstrip(option);
@@ -2892,19 +2936,20 @@ static int trace_set_options(char *option)
cmp += 2;
}
+ mutex_lock(&trace_types_lock);
+
for (i = 0; trace_options[i]; i++) {
if (strcmp(cmp, trace_options[i]) == 0) {
- set_tracer_flags(1 << i, !neg);
+ ret = set_tracer_flag(1 << i, !neg);
break;
}
}
/* If no option could be set, test the specific tracer options */
- if (!trace_options[i]) {
- mutex_lock(&trace_types_lock);
+ if (!trace_options[i])
ret = set_tracer_option(current_trace, cmp, neg);
- mutex_unlock(&trace_types_lock);
- }
+
+ mutex_unlock(&trace_types_lock);
return ret;
}
@@ -2914,6 +2959,7 @@ tracing_trace_options_write(struct file *filp, const char __user *ubuf,
size_t cnt, loff_t *ppos)
{
char buf[64];
+ int ret;
if (cnt >= sizeof(buf))
return -EINVAL;
@@ -2923,7 +2969,9 @@ tracing_trace_options_write(struct file *filp, const char __user *ubuf,
buf[cnt] = 0;
- trace_set_options(buf);
+ ret = trace_set_options(buf);
+ if (ret < 0)
+ return ret;
*ppos += cnt;
@@ -3227,6 +3275,9 @@ static int tracing_set_tracer(const char *buf)
goto out;
trace_branch_disable();
+
+ current_trace->enabled = false;
+
if (current_trace->reset)
current_trace->reset(tr);
@@ -3271,6 +3322,7 @@ static int tracing_set_tracer(const char *buf)
}
current_trace = t;
+ current_trace->enabled = true;
trace_branch_enable(tr);
out:
mutex_unlock(&trace_types_lock);
@@ -4144,8 +4196,6 @@ tracing_snapshot_write(struct file *filp, const char __user *ubuf, size_t cnt,
default:
if (current_trace->allocated_snapshot)
tracing_reset_online_cpus(&max_tr);
- else
- ret = -EINVAL;
break;
}
@@ -4759,7 +4809,13 @@ trace_options_core_write(struct file *filp, const char __user *ubuf, size_t cnt,
if (val != 0 && val != 1)
return -EINVAL;
- set_tracer_flags(1 << index, val);
+
+ mutex_lock(&trace_types_lock);
+ ret = set_tracer_flag(1 << index, val);
+ mutex_unlock(&trace_types_lock);
+
+ if (ret < 0)
+ return ret;
*ppos += cnt;
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 57d7e5397d5..2081971367e 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -283,11 +283,15 @@ struct tracer {
enum print_line_t (*print_line)(struct trace_iterator *iter);
/* If you handled the flag setting, return 0 */
int (*set_flag)(u32 old_flags, u32 bit, int set);
+ /* Return 0 if OK with change, else return non-zero */
+ int (*flag_changed)(struct tracer *tracer,
+ u32 mask, int set);
struct tracer *next;
struct tracer_flags *flags;
bool print_max;
bool use_max_tr;
bool allocated_snapshot;
+ bool enabled;
};
@@ -943,6 +947,8 @@ extern const char *__stop___trace_bprintk_fmt[];
void trace_printk_init_buffers(void);
void trace_printk_start_comm(void);
+int trace_keep_overwrite(struct tracer *tracer, u32 mask, int set);
+int set_tracer_flag(unsigned int mask, int enabled);
#undef FTRACE_ENTRY
#define FTRACE_ENTRY(call, struct_name, id, tstruct, print, filter) \
diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c
index 713a2cac488..443b25b43b4 100644
--- a/kernel/trace/trace_irqsoff.c
+++ b/kernel/trace/trace_irqsoff.c
@@ -32,7 +32,7 @@ enum {
static int trace_type __read_mostly;
-static int save_lat_flag;
+static int save_flags;
static void stop_irqsoff_tracer(struct trace_array *tr, int graph);
static int start_irqsoff_tracer(struct trace_array *tr, int graph);
@@ -558,8 +558,11 @@ static void stop_irqsoff_tracer(struct trace_array *tr, int graph)
static void __irqsoff_tracer_init(struct trace_array *tr)
{
- save_lat_flag = trace_flags & TRACE_ITER_LATENCY_FMT;
- trace_flags |= TRACE_ITER_LATENCY_FMT;
+ save_flags = trace_flags;
+
+ /* non overwrite screws up the latency tracers */
+ set_tracer_flag(TRACE_ITER_OVERWRITE, 1);
+ set_tracer_flag(TRACE_ITER_LATENCY_FMT, 1);
tracing_max_latency = 0;
irqsoff_trace = tr;
@@ -573,10 +576,13 @@ static void __irqsoff_tracer_init(struct trace_array *tr)
static void irqsoff_tracer_reset(struct trace_array *tr)
{
+ int lat_flag = save_flags & TRACE_ITER_LATENCY_FMT;
+ int overwrite_flag = save_flags & TRACE_ITER_OVERWRITE;
+
stop_irqsoff_tracer(tr, is_graph());
- if (!save_lat_flag)
- trace_flags &= ~TRACE_ITER_LATENCY_FMT;
+ set_tracer_flag(TRACE_ITER_LATENCY_FMT, lat_flag);
+ set_tracer_flag(TRACE_ITER_OVERWRITE, overwrite_flag);
}
static void irqsoff_tracer_start(struct trace_array *tr)
@@ -609,6 +615,7 @@ static struct tracer irqsoff_tracer __read_mostly =
.print_line = irqsoff_print_line,
.flags = &tracer_flags,
.set_flag = irqsoff_set_flag,
+ .flag_changed = trace_keep_overwrite,
#ifdef CONFIG_FTRACE_SELFTEST
.selftest = trace_selftest_startup_irqsoff,
#endif
@@ -642,6 +649,7 @@ static struct tracer preemptoff_tracer __read_mostly =
.print_line = irqsoff_print_line,
.flags = &tracer_flags,
.set_flag = irqsoff_set_flag,
+ .flag_changed = trace_keep_overwrite,
#ifdef CONFIG_FTRACE_SELFTEST
.selftest = trace_selftest_startup_preemptoff,
#endif
@@ -677,6 +685,7 @@ static struct tracer preemptirqsoff_tracer __read_mostly =
.print_line = irqsoff_print_line,
.flags = &tracer_flags,
.set_flag = irqsoff_set_flag,
+ .flag_changed = trace_keep_overwrite,
#ifdef CONFIG_FTRACE_SELFTEST
.selftest = trace_selftest_startup_preemptirqsoff,
#endif
diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index 75aa97fbe1a..fde652c9a51 100644
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -36,7 +36,7 @@ static void __wakeup_reset(struct trace_array *tr);
static int wakeup_graph_entry(struct ftrace_graph_ent *trace);
static void wakeup_graph_return(struct ftrace_graph_ret *trace);
-static int save_lat_flag;
+static int save_flags;
#define TRACE_DISPLAY_GRAPH 1
@@ -540,8 +540,11 @@ static void stop_wakeup_tracer(struct trace_array *tr)
static int __wakeup_tracer_init(struct trace_array *tr)
{
- save_lat_flag = trace_flags & TRACE_ITER_LATENCY_FMT;
- trace_flags |= TRACE_ITER_LATENCY_FMT;
+ save_flags = trace_flags;
+
+ /* non overwrite screws up the latency tracers */
+ set_tracer_flag(TRACE_ITER_OVERWRITE, 1);
+ set_tracer_flag(TRACE_ITER_LATENCY_FMT, 1);
tracing_max_latency = 0;
wakeup_trace = tr;
@@ -563,12 +566,15 @@ static int wakeup_rt_tracer_init(struct trace_array *tr)
static void wakeup_tracer_reset(struct trace_array *tr)
{
+ int lat_flag = save_flags & TRACE_ITER_LATENCY_FMT;
+ int overwrite_flag = save_flags & TRACE_ITER_OVERWRITE;
+
stop_wakeup_tracer(tr);
/* make sure we put back any tasks we are tracing */
wakeup_reset(tr);
- if (!save_lat_flag)
- trace_flags &= ~TRACE_ITER_LATENCY_FMT;
+ set_tracer_flag(TRACE_ITER_LATENCY_FMT, lat_flag);
+ set_tracer_flag(TRACE_ITER_OVERWRITE, overwrite_flag);
}
static void wakeup_tracer_start(struct trace_array *tr)
@@ -594,6 +600,7 @@ static struct tracer wakeup_tracer __read_mostly =
.print_line = wakeup_print_line,
.flags = &tracer_flags,
.set_flag = wakeup_set_flag,
+ .flag_changed = trace_keep_overwrite,
#ifdef CONFIG_FTRACE_SELFTEST
.selftest = trace_selftest_startup_wakeup,
#endif
@@ -615,6 +622,7 @@ static struct tracer wakeup_rt_tracer __read_mostly =
.print_line = wakeup_print_line,
.flags = &tracer_flags,
.set_flag = wakeup_set_flag,
+ .flag_changed = trace_keep_overwrite,
#ifdef CONFIG_FTRACE_SELFTEST
.selftest = trace_selftest_startup_wakeup,
#endif
diff --git a/kernel/user.c b/kernel/user.c
index e81978e8c03..5bbb91988e6 100644
--- a/kernel/user.c
+++ b/kernel/user.c
@@ -16,7 +16,7 @@
#include <linux/interrupt.h>
#include <linux/export.h>
#include <linux/user_namespace.h>
-#include <linux/proc_fs.h>
+#include <linux/proc_ns.h>
/*
* userns count is 1 for root user, 1 for init_uts_ns,
diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c
index 8b650837083..51855f5f631 100644
--- a/kernel/user_namespace.c
+++ b/kernel/user_namespace.c
@@ -9,7 +9,7 @@
#include <linux/nsproxy.h>
#include <linux/slab.h>
#include <linux/user_namespace.h>
-#include <linux/proc_fs.h>
+#include <linux/proc_ns.h>
#include <linux/highuid.h>
#include <linux/cred.h>
#include <linux/securebits.h>
@@ -21,6 +21,7 @@
#include <linux/uaccess.h>
#include <linux/ctype.h>
#include <linux/projid.h>
+#include <linux/fs_struct.h>
static struct kmem_cache *user_ns_cachep __read_mostly;
@@ -837,6 +838,9 @@ static int userns_install(struct nsproxy *nsproxy, void *ns)
if (atomic_read(&current->mm->mm_users) > 1)
return -EINVAL;
+ if (current->fs->users != 1)
+ return -EINVAL;
+
if (!ns_capable(user_ns, CAP_SYS_ADMIN))
return -EPERM;
diff --git a/kernel/utsname.c b/kernel/utsname.c
index a47fc5de311..2fc8576efaa 100644
--- a/kernel/utsname.c
+++ b/kernel/utsname.c
@@ -15,7 +15,7 @@
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/user_namespace.h>
-#include <linux/proc_fs.h>
+#include <linux/proc_ns.h>
static struct uts_namespace *create_uts_ns(void)
{
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 81f2457811e..b48cd597145 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -457,11 +457,12 @@ static int worker_pool_assign_id(struct worker_pool *pool)
int ret;
mutex_lock(&worker_pool_idr_mutex);
- idr_pre_get(&worker_pool_idr, GFP_KERNEL);
- ret = idr_get_new(&worker_pool_idr, pool, &pool->id);
+ ret = idr_alloc(&worker_pool_idr, pool, 0, 0, GFP_KERNEL);
+ if (ret >= 0)
+ pool->id = ret;
mutex_unlock(&worker_pool_idr_mutex);
- return ret;
+ return ret < 0 ? ret : 0;
}
/*
@@ -3446,28 +3447,34 @@ static void wq_unbind_fn(struct work_struct *work)
spin_unlock_irq(&pool->lock);
mutex_unlock(&pool->assoc_mutex);
- }
- /*
- * Call schedule() so that we cross rq->lock and thus can guarantee
- * sched callbacks see the %WORKER_UNBOUND flag. This is necessary
- * as scheduler callbacks may be invoked from other cpus.
- */
- schedule();
+ /*
+ * Call schedule() so that we cross rq->lock and thus can
+ * guarantee sched callbacks see the %WORKER_UNBOUND flag.
+ * This is necessary as scheduler callbacks may be invoked
+ * from other cpus.
+ */
+ schedule();
- /*
- * Sched callbacks are disabled now. Zap nr_running. After this,
- * nr_running stays zero and need_more_worker() and keep_working()
- * are always true as long as the worklist is not empty. Pools on
- * @cpu now behave as unbound (in terms of concurrency management)
- * pools which are served by workers tied to the CPU.
- *
- * On return from this function, the current worker would trigger
- * unbound chain execution of pending work items if other workers
- * didn't already.
- */
- for_each_std_worker_pool(pool, cpu)
+ /*
+ * Sched callbacks are disabled now. Zap nr_running.
+ * After this, nr_running stays zero and need_more_worker()
+ * and keep_working() are always true as long as the
+ * worklist is not empty. This pool now behaves as an
+ * unbound (in terms of concurrency management) pool which
+ * are served by workers tied to the pool.
+ */
atomic_set(&pool->nr_running, 0);
+
+ /*
+ * With concurrency management just turned off, a busy
+ * worker blocking could lead to lengthy stalls. Kick off
+ * unbound chain execution of currently pending work items.
+ */
+ spin_lock_irq(&pool->lock);
+ wake_up_worker(pool);
+ spin_unlock_irq(&pool->lock);
+ }
}
/*
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-11-04 11:09:31 +0000