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-rw-r--r--kernel/exit.c4
-rw-r--r--kernel/lockdep.c6
-rw-r--r--kernel/lockdep_proc.c3
-rw-r--r--kernel/module.c2
-rw-r--r--kernel/nsproxy.c1
-rw-r--r--kernel/power/disk.c13
-rw-r--r--kernel/power/main.c5
-rw-r--r--kernel/power/swap.c1
-rw-r--r--kernel/rcupdate.c1
-rw-r--r--kernel/sched_clock.c84
-rw-r--r--kernel/sched_features.h2
-rw-r--r--kernel/sched_rt.c13
-rw-r--r--kernel/signal.c5
-rw-r--r--kernel/smp.c10
-rw-r--r--kernel/sys.c8
-rw-r--r--kernel/time/tick-sched.c6
-rw-r--r--kernel/user_namespace.c1
-rw-r--r--kernel/utsname.c1
-rw-r--r--kernel/utsname_sysctl.c1
19 files changed, 84 insertions, 83 deletions
diff --git a/kernel/exit.c b/kernel/exit.c
index 38ec4063014..75c64738763 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -918,8 +918,8 @@ static void exit_notify(struct task_struct *tsk, int group_dead)
/* mt-exec, de_thread() is waiting for us */
if (thread_group_leader(tsk) &&
- tsk->signal->notify_count < 0 &&
- tsk->signal->group_exit_task)
+ tsk->signal->group_exit_task &&
+ tsk->signal->notify_count < 0)
wake_up_process(tsk->signal->group_exit_task);
write_unlock_irq(&tasklist_lock);
diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index 3bfb1877a00..dbda475b13b 100644
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -875,11 +875,11 @@ static int add_lock_to_list(struct lock_class *class, struct lock_class *this,
if (!entry)
return 0;
- entry->class = this;
- entry->distance = distance;
if (!save_trace(&entry->trace))
return 0;
+ entry->class = this;
+ entry->distance = distance;
/*
* Since we never remove from the dependency list, the list can
* be walked lockless by other CPUs, it's only allocation
@@ -3029,7 +3029,7 @@ found_it:
stats = get_lock_stats(hlock_class(hlock));
if (point < ARRAY_SIZE(stats->contention_point))
- stats->contention_point[i]++;
+ stats->contention_point[point]++;
if (lock->cpu != smp_processor_id())
stats->bounces[bounce_contended + !!hlock->read]++;
put_lock_stats(stats);
diff --git a/kernel/lockdep_proc.c b/kernel/lockdep_proc.c
index 4b194d34d77..20dbcbf9c7d 100644
--- a/kernel/lockdep_proc.c
+++ b/kernel/lockdep_proc.c
@@ -472,8 +472,9 @@ static void snprint_time(char *buf, size_t bufsiz, s64 nr)
{
unsigned long rem;
+ nr += 5; /* for display rounding */
rem = do_div(nr, 1000); /* XXX: do_div_signed */
- snprintf(buf, bufsiz, "%lld.%02d", (long long)nr, ((int)rem+5)/10);
+ snprintf(buf, bufsiz, "%lld.%02d", (long long)nr, (int)rem/10);
}
static void seq_time(struct seq_file *m, s64 time)
diff --git a/kernel/module.c b/kernel/module.c
index 08864d257eb..9db11911e04 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -1799,7 +1799,7 @@ static void *module_alloc_update_bounds(unsigned long size)
/* Allocate and load the module: note that size of section 0 is always
zero, and we rely on this for optional sections. */
-static struct module *load_module(void __user *umod,
+static noinline struct module *load_module(void __user *umod,
unsigned long len,
const char __user *uargs)
{
diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c
index 21575fc46d0..1d3ef29a258 100644
--- a/kernel/nsproxy.c
+++ b/kernel/nsproxy.c
@@ -14,7 +14,6 @@
*/
#include <linux/module.h>
-#include <linux/version.h>
#include <linux/nsproxy.h>
#include <linux/init_task.h>
#include <linux/mnt_namespace.h>
diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index f011e0870b5..bbd85c60f74 100644
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -21,6 +21,7 @@
#include <linux/console.h>
#include <linux/cpu.h>
#include <linux/freezer.h>
+#include <linux/ftrace.h>
#include "power.h"
@@ -255,7 +256,7 @@ static int create_image(int platform_mode)
int hibernation_snapshot(int platform_mode)
{
- int error;
+ int error, ftrace_save;
/* Free memory before shutting down devices. */
error = swsusp_shrink_memory();
@@ -267,6 +268,7 @@ int hibernation_snapshot(int platform_mode)
goto Close;
suspend_console();
+ ftrace_save = __ftrace_enabled_save();
error = device_suspend(PMSG_FREEZE);
if (error)
goto Recover_platform;
@@ -296,6 +298,7 @@ int hibernation_snapshot(int platform_mode)
Resume_devices:
device_resume(in_suspend ?
(error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE);
+ __ftrace_enabled_restore(ftrace_save);
resume_console();
Close:
platform_end(platform_mode);
@@ -366,10 +369,11 @@ static int resume_target_kernel(void)
int hibernation_restore(int platform_mode)
{
- int error;
+ int error, ftrace_save;
pm_prepare_console();
suspend_console();
+ ftrace_save = __ftrace_enabled_save();
error = device_suspend(PMSG_QUIESCE);
if (error)
goto Finish;
@@ -384,6 +388,7 @@ int hibernation_restore(int platform_mode)
platform_restore_cleanup(platform_mode);
device_resume(PMSG_RECOVER);
Finish:
+ __ftrace_enabled_restore(ftrace_save);
resume_console();
pm_restore_console();
return error;
@@ -396,7 +401,7 @@ int hibernation_restore(int platform_mode)
int hibernation_platform_enter(void)
{
- int error;
+ int error, ftrace_save;
if (!hibernation_ops)
return -ENOSYS;
@@ -411,6 +416,7 @@ int hibernation_platform_enter(void)
goto Close;
suspend_console();
+ ftrace_save = __ftrace_enabled_save();
error = device_suspend(PMSG_HIBERNATE);
if (error) {
if (hibernation_ops->recover)
@@ -445,6 +451,7 @@ int hibernation_platform_enter(void)
hibernation_ops->finish();
Resume_devices:
device_resume(PMSG_RESTORE);
+ __ftrace_enabled_restore(ftrace_save);
resume_console();
Close:
hibernation_ops->end();
diff --git a/kernel/power/main.c b/kernel/power/main.c
index 0b7476f5d2a..540b16b6856 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -21,6 +21,7 @@
#include <linux/freezer.h>
#include <linux/vmstat.h>
#include <linux/syscalls.h>
+#include <linux/ftrace.h>
#include "power.h"
@@ -310,7 +311,7 @@ static int suspend_enter(suspend_state_t state)
*/
int suspend_devices_and_enter(suspend_state_t state)
{
- int error;
+ int error, ftrace_save;
if (!suspend_ops)
return -ENOSYS;
@@ -321,6 +322,7 @@ int suspend_devices_and_enter(suspend_state_t state)
goto Close;
}
suspend_console();
+ ftrace_save = __ftrace_enabled_save();
suspend_test_start();
error = device_suspend(PMSG_SUSPEND);
if (error) {
@@ -352,6 +354,7 @@ int suspend_devices_and_enter(suspend_state_t state)
suspend_test_start();
device_resume(PMSG_RESUME);
suspend_test_finish("resume devices");
+ __ftrace_enabled_restore(ftrace_save);
resume_console();
Close:
if (suspend_ops->end)
diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index a0abf9a463f..80ccac849e4 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -14,7 +14,6 @@
#include <linux/module.h>
#include <linux/file.h>
#include <linux/utsname.h>
-#include <linux/version.h>
#include <linux/delay.h>
#include <linux/bitops.h>
#include <linux/genhd.h>
diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c
index f14f372cf6f..467d5940f62 100644
--- a/kernel/rcupdate.c
+++ b/kernel/rcupdate.c
@@ -77,6 +77,7 @@ void wakeme_after_rcu(struct rcu_head *head)
* sections are delimited by rcu_read_lock() and rcu_read_unlock(),
* and may be nested.
*/
+void synchronize_rcu(void); /* Makes kernel-doc tools happy */
synchronize_rcu_xxx(synchronize_rcu, call_rcu)
EXPORT_SYMBOL_GPL(synchronize_rcu);
diff --git a/kernel/sched_clock.c b/kernel/sched_clock.c
index 204991a0bfa..e8ab096ddfe 100644
--- a/kernel/sched_clock.c
+++ b/kernel/sched_clock.c
@@ -12,19 +12,17 @@
*
* Create a semi stable clock from a mixture of other events, including:
* - gtod
- * - jiffies
* - sched_clock()
* - explicit idle events
*
* We use gtod as base and the unstable clock deltas. The deltas are filtered,
- * making it monotonic and keeping it within an expected window. This window
- * is set up using jiffies.
+ * making it monotonic and keeping it within an expected window.
*
* Furthermore, explicit sleep and wakeup hooks allow us to account for time
* that is otherwise invisible (TSC gets stopped).
*
* The clock: sched_clock_cpu() is monotonic per cpu, and should be somewhat
- * consistent between cpus (never more than 1 jiffies difference).
+ * consistent between cpus (never more than 2 jiffies difference).
*/
#include <linux/sched.h>
#include <linux/percpu.h>
@@ -54,7 +52,6 @@ struct sched_clock_data {
*/
raw_spinlock_t lock;
- unsigned long tick_jiffies;
u64 tick_raw;
u64 tick_gtod;
u64 clock;
@@ -75,14 +72,12 @@ static inline struct sched_clock_data *cpu_sdc(int cpu)
void sched_clock_init(void)
{
u64 ktime_now = ktime_to_ns(ktime_get());
- unsigned long now_jiffies = jiffies;
int cpu;
for_each_possible_cpu(cpu) {
struct sched_clock_data *scd = cpu_sdc(cpu);
scd->lock = (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED;
- scd->tick_jiffies = now_jiffies;
scd->tick_raw = 0;
scd->tick_gtod = ktime_now;
scd->clock = ktime_now;
@@ -92,46 +87,51 @@ void sched_clock_init(void)
}
/*
+ * min,max except they take wrapping into account
+ */
+
+static inline u64 wrap_min(u64 x, u64 y)
+{
+ return (s64)(x - y) < 0 ? x : y;
+}
+
+static inline u64 wrap_max(u64 x, u64 y)
+{
+ return (s64)(x - y) > 0 ? x : y;
+}
+
+/*
* update the percpu scd from the raw @now value
*
* - filter out backward motion
- * - use jiffies to generate a min,max window to clip the raw values
+ * - use the GTOD tick value to create a window to filter crazy TSC values
*/
static u64 __update_sched_clock(struct sched_clock_data *scd, u64 now)
{
- unsigned long now_jiffies = jiffies;
- long delta_jiffies = now_jiffies - scd->tick_jiffies;
- u64 clock = scd->clock;
- u64 min_clock, max_clock;
s64 delta = now - scd->tick_raw;
+ u64 clock, min_clock, max_clock;
WARN_ON_ONCE(!irqs_disabled());
- min_clock = scd->tick_gtod + delta_jiffies * TICK_NSEC;
- if (unlikely(delta < 0)) {
- clock++;
- goto out;
- }
+ if (unlikely(delta < 0))
+ delta = 0;
- max_clock = min_clock + TICK_NSEC;
+ /*
+ * scd->clock = clamp(scd->tick_gtod + delta,
+ * max(scd->tick_gtod, scd->clock),
+ * scd->tick_gtod + TICK_NSEC);
+ */
- if (unlikely(clock + delta > max_clock)) {
- if (clock < max_clock)
- clock = max_clock;
- else
- clock++;
- } else {
- clock += delta;
- }
+ clock = scd->tick_gtod + delta;
+ min_clock = wrap_max(scd->tick_gtod, scd->clock);
+ max_clock = scd->tick_gtod + TICK_NSEC;
- out:
- if (unlikely(clock < min_clock))
- clock = min_clock;
+ clock = wrap_max(clock, min_clock);
+ clock = wrap_min(clock, max_clock);
- scd->tick_jiffies = now_jiffies;
scd->clock = clock;
- return clock;
+ return scd->clock;
}
static void lock_double_clock(struct sched_clock_data *data1,
@@ -171,7 +171,7 @@ u64 sched_clock_cpu(int cpu)
* larger time as the latest time for both
* runqueues. (this creates monotonic movement)
*/
- if (likely(remote_clock < this_clock)) {
+ if (likely((s64)(remote_clock - this_clock) < 0)) {
clock = this_clock;
scd->clock = clock;
} else {
@@ -207,14 +207,9 @@ void sched_clock_tick(void)
now = sched_clock();
__raw_spin_lock(&scd->lock);
- __update_sched_clock(scd, now);
- /*
- * update tick_gtod after __update_sched_clock() because that will
- * already observe 1 new jiffy; adding a new tick_gtod to that would
- * increase the clock 2 jiffies.
- */
scd->tick_raw = now;
scd->tick_gtod = now_gtod;
+ __update_sched_clock(scd, now);
__raw_spin_unlock(&scd->lock);
}
@@ -232,18 +227,7 @@ EXPORT_SYMBOL_GPL(sched_clock_idle_sleep_event);
*/
void sched_clock_idle_wakeup_event(u64 delta_ns)
{
- struct sched_clock_data *scd = this_scd();
-
- /*
- * Override the previous timestamp and ignore all
- * sched_clock() deltas that occured while we idled,
- * and use the PM-provided delta_ns to advance the
- * rq clock:
- */
- __raw_spin_lock(&scd->lock);
- scd->clock += delta_ns;
- __raw_spin_unlock(&scd->lock);
-
+ sched_clock_tick();
touch_softlockup_watchdog();
}
EXPORT_SYMBOL_GPL(sched_clock_idle_wakeup_event);
diff --git a/kernel/sched_features.h b/kernel/sched_features.h
index 862b06bd560..9353ca78154 100644
--- a/kernel/sched_features.h
+++ b/kernel/sched_features.h
@@ -8,6 +8,6 @@ SCHED_FEAT(SYNC_WAKEUPS, 1)
SCHED_FEAT(HRTICK, 1)
SCHED_FEAT(DOUBLE_TICK, 0)
SCHED_FEAT(ASYM_GRAN, 1)
-SCHED_FEAT(LB_BIAS, 0)
+SCHED_FEAT(LB_BIAS, 1)
SCHED_FEAT(LB_WAKEUP_UPDATE, 1)
SCHED_FEAT(ASYM_EFF_LOAD, 1)
diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index 998ba54b454..552310798da 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -199,6 +199,8 @@ static inline struct rt_rq *group_rt_rq(struct sched_rt_entity *rt_se)
static inline void sched_rt_rq_enqueue(struct rt_rq *rt_rq)
{
+ if (rt_rq->rt_nr_running)
+ resched_task(rq_of_rt_rq(rt_rq)->curr);
}
static inline void sched_rt_rq_dequeue(struct rt_rq *rt_rq)
@@ -438,9 +440,6 @@ static int sched_rt_runtime_exceeded(struct rt_rq *rt_rq)
{
u64 runtime = sched_rt_runtime(rt_rq);
- if (runtime == RUNTIME_INF)
- return 0;
-
if (rt_rq->rt_throttled)
return rt_rq_throttled(rt_rq);
@@ -491,9 +490,11 @@ static void update_curr_rt(struct rq *rq)
rt_rq = rt_rq_of_se(rt_se);
spin_lock(&rt_rq->rt_runtime_lock);
- rt_rq->rt_time += delta_exec;
- if (sched_rt_runtime_exceeded(rt_rq))
- resched_task(curr);
+ if (sched_rt_runtime(rt_rq) != RUNTIME_INF) {
+ rt_rq->rt_time += delta_exec;
+ if (sched_rt_runtime_exceeded(rt_rq))
+ resched_task(curr);
+ }
spin_unlock(&rt_rq->rt_runtime_lock);
}
}
diff --git a/kernel/signal.c b/kernel/signal.c
index c539f60c6f4..e661b01d340 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1338,6 +1338,7 @@ int do_notify_parent(struct task_struct *tsk, int sig)
struct siginfo info;
unsigned long flags;
struct sighand_struct *psig;
+ int ret = sig;
BUG_ON(sig == -1);
@@ -1402,7 +1403,7 @@ int do_notify_parent(struct task_struct *tsk, int sig)
* is implementation-defined: we do (if you don't want
* it, just use SIG_IGN instead).
*/
- tsk->exit_signal = -1;
+ ret = tsk->exit_signal = -1;
if (psig->action[SIGCHLD-1].sa.sa_handler == SIG_IGN)
sig = -1;
}
@@ -1411,7 +1412,7 @@ int do_notify_parent(struct task_struct *tsk, int sig)
__wake_up_parent(tsk, tsk->parent);
spin_unlock_irqrestore(&psig->siglock, flags);
- return sig;
+ return ret;
}
static void do_notify_parent_cldstop(struct task_struct *tsk, int why)
diff --git a/kernel/smp.c b/kernel/smp.c
index 782e2b93e46..f362a855377 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -210,8 +210,10 @@ int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
{
struct call_single_data d;
unsigned long flags;
- /* prevent preemption and reschedule on another processor */
+ /* prevent preemption and reschedule on another processor,
+ as well as CPU removal */
int me = get_cpu();
+ int err = 0;
/* Can deadlock when called with interrupts disabled */
WARN_ON(irqs_disabled());
@@ -220,7 +222,7 @@ int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
local_irq_save(flags);
func(info);
local_irq_restore(flags);
- } else {
+ } else if ((unsigned)cpu < NR_CPUS && cpu_online(cpu)) {
struct call_single_data *data = NULL;
if (!wait) {
@@ -236,10 +238,12 @@ int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
data->func = func;
data->info = info;
generic_exec_single(cpu, data);
+ } else {
+ err = -ENXIO; /* CPU not online */
}
put_cpu();
- return 0;
+ return err;
}
EXPORT_SYMBOL(smp_call_function_single);
diff --git a/kernel/sys.c b/kernel/sys.c
index 3dacb00a7f7..038a7bc0901 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -169,9 +169,9 @@ asmlinkage long sys_setpriority(int which, int who, int niceval)
pgrp = find_vpid(who);
else
pgrp = task_pgrp(current);
- do_each_pid_task(pgrp, PIDTYPE_PGID, p) {
+ do_each_pid_thread(pgrp, PIDTYPE_PGID, p) {
error = set_one_prio(p, niceval, error);
- } while_each_pid_task(pgrp, PIDTYPE_PGID, p);
+ } while_each_pid_thread(pgrp, PIDTYPE_PGID, p);
break;
case PRIO_USER:
user = current->user;
@@ -229,11 +229,11 @@ asmlinkage long sys_getpriority(int which, int who)
pgrp = find_vpid(who);
else
pgrp = task_pgrp(current);
- do_each_pid_task(pgrp, PIDTYPE_PGID, p) {
+ do_each_pid_thread(pgrp, PIDTYPE_PGID, p) {
niceval = 20 - task_nice(p);
if (niceval > retval)
retval = niceval;
- } while_each_pid_task(pgrp, PIDTYPE_PGID, p);
+ } while_each_pid_thread(pgrp, PIDTYPE_PGID, p);
break;
case PRIO_USER:
user = current->user;
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index f5da526424a..7a46bde78c6 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -643,17 +643,21 @@ void tick_setup_sched_timer(void)
ts->nohz_mode = NOHZ_MODE_HIGHRES;
#endif
}
+#endif /* HIGH_RES_TIMERS */
+#if defined CONFIG_NO_HZ || defined CONFIG_HIGH_RES_TIMERS
void tick_cancel_sched_timer(int cpu)
{
struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
+# ifdef CONFIG_HIGH_RES_TIMERS
if (ts->sched_timer.base)
hrtimer_cancel(&ts->sched_timer);
+# endif
ts->nohz_mode = NOHZ_MODE_INACTIVE;
}
-#endif /* HIGH_RES_TIMERS */
+#endif
/**
* Async notification about clocksource changes
diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c
index a9ab0596de4..532858fa5b8 100644
--- a/kernel/user_namespace.c
+++ b/kernel/user_namespace.c
@@ -6,7 +6,6 @@
*/
#include <linux/module.h>
-#include <linux/version.h>
#include <linux/nsproxy.h>
#include <linux/slab.h>
#include <linux/user_namespace.h>
diff --git a/kernel/utsname.c b/kernel/utsname.c
index 64d398f1244..815237a55af 100644
--- a/kernel/utsname.c
+++ b/kernel/utsname.c
@@ -12,7 +12,6 @@
#include <linux/module.h>
#include <linux/uts.h>
#include <linux/utsname.h>
-#include <linux/version.h>
#include <linux/err.h>
#include <linux/slab.h>
diff --git a/kernel/utsname_sysctl.c b/kernel/utsname_sysctl.c
index fe3a56c2256..4ab9659d269 100644
--- a/kernel/utsname_sysctl.c
+++ b/kernel/utsname_sysctl.c
@@ -12,7 +12,6 @@
#include <linux/module.h>
#include <linux/uts.h>
#include <linux/utsname.h>
-#include <linux/version.h>
#include <linux/sysctl.h>
static void *get_uts(ctl_table *table, int write)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-01-06 16:04:02 +0000