v4.19.13 snapshot.
diff --git a/init/init_task.c b/init/init_task.c
new file mode 100644
index 0000000..5aebe3b
--- /dev/null
+++ b/init/init_task.c
@@ -0,0 +1,191 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/init_task.h>
+#include <linux/export.h>
+#include <linux/mqueue.h>
+#include <linux/sched.h>
+#include <linux/sched/sysctl.h>
+#include <linux/sched/rt.h>
+#include <linux/sched/task.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/audit.h>
+
+#include <asm/pgtable.h>
+#include <linux/uaccess.h>
+
+static struct signal_struct init_signals = {
+ .nr_threads = 1,
+ .thread_head = LIST_HEAD_INIT(init_task.thread_node),
+ .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(init_signals.wait_chldexit),
+ .shared_pending = {
+ .list = LIST_HEAD_INIT(init_signals.shared_pending.list),
+ .signal = {{0}}
+ },
+ .multiprocess = HLIST_HEAD_INIT,
+ .rlim = INIT_RLIMITS,
+ .cred_guard_mutex = __MUTEX_INITIALIZER(init_signals.cred_guard_mutex),
+#ifdef CONFIG_POSIX_TIMERS
+ .posix_timers = LIST_HEAD_INIT(init_signals.posix_timers),
+ .cputimer = {
+ .cputime_atomic = INIT_CPUTIME_ATOMIC,
+ .running = false,
+ .checking_timer = false,
+ },
+#endif
+ INIT_CPU_TIMERS(init_signals)
+ .pids = {
+ [PIDTYPE_PID] = &init_struct_pid,
+ [PIDTYPE_TGID] = &init_struct_pid,
+ [PIDTYPE_PGID] = &init_struct_pid,
+ [PIDTYPE_SID] = &init_struct_pid,
+ },
+ INIT_PREV_CPUTIME(init_signals)
+};
+
+static struct sighand_struct init_sighand = {
+ .count = ATOMIC_INIT(1),
+ .action = { { { .sa_handler = SIG_DFL, } }, },
+ .siglock = __SPIN_LOCK_UNLOCKED(init_sighand.siglock),
+ .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(init_sighand.signalfd_wqh),
+};
+
+/*
+ * Set up the first task table, touch at your own risk!. Base=0,
+ * limit=0x1fffff (=2MB)
+ */
+struct task_struct init_task
+#ifdef CONFIG_ARCH_TASK_STRUCT_ON_STACK
+ __init_task_data
+#endif
+= {
+#ifdef CONFIG_THREAD_INFO_IN_TASK
+ .thread_info = INIT_THREAD_INFO(init_task),
+ .stack_refcount = ATOMIC_INIT(1),
+#endif
+ .state = 0,
+ .stack = init_stack,
+ .usage = ATOMIC_INIT(2),
+ .flags = PF_KTHREAD,
+ .prio = MAX_PRIO - 20,
+ .static_prio = MAX_PRIO - 20,
+ .normal_prio = MAX_PRIO - 20,
+ .policy = SCHED_NORMAL,
+ .cpus_allowed = CPU_MASK_ALL,
+ .nr_cpus_allowed= NR_CPUS,
+ .mm = NULL,
+ .active_mm = &init_mm,
+ .restart_block = {
+ .fn = do_no_restart_syscall,
+ },
+ .se = {
+ .group_node = LIST_HEAD_INIT(init_task.se.group_node),
+ },
+ .rt = {
+ .run_list = LIST_HEAD_INIT(init_task.rt.run_list),
+ .time_slice = RR_TIMESLICE,
+ },
+ .tasks = LIST_HEAD_INIT(init_task.tasks),
+#ifdef CONFIG_SMP
+ .pushable_tasks = PLIST_NODE_INIT(init_task.pushable_tasks, MAX_PRIO),
+#endif
+#ifdef CONFIG_CGROUP_SCHED
+ .sched_task_group = &root_task_group,
+#endif
+ .ptraced = LIST_HEAD_INIT(init_task.ptraced),
+ .ptrace_entry = LIST_HEAD_INIT(init_task.ptrace_entry),
+ .real_parent = &init_task,
+ .parent = &init_task,
+ .children = LIST_HEAD_INIT(init_task.children),
+ .sibling = LIST_HEAD_INIT(init_task.sibling),
+ .group_leader = &init_task,
+ RCU_POINTER_INITIALIZER(real_cred, &init_cred),
+ RCU_POINTER_INITIALIZER(cred, &init_cred),
+ .comm = INIT_TASK_COMM,
+ .thread = INIT_THREAD,
+ .fs = &init_fs,
+ .files = &init_files,
+ .signal = &init_signals,
+ .sighand = &init_sighand,
+ .nsproxy = &init_nsproxy,
+ .pending = {
+ .list = LIST_HEAD_INIT(init_task.pending.list),
+ .signal = {{0}}
+ },
+ .blocked = {{0}},
+ .alloc_lock = __SPIN_LOCK_UNLOCKED(init_task.alloc_lock),
+ .journal_info = NULL,
+ INIT_CPU_TIMERS(init_task)
+ .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(init_task.pi_lock),
+ .timer_slack_ns = 50000, /* 50 usec default slack */
+ .thread_pid = &init_struct_pid,
+ .thread_group = LIST_HEAD_INIT(init_task.thread_group),
+ .thread_node = LIST_HEAD_INIT(init_signals.thread_head),
+#ifdef CONFIG_AUDITSYSCALL
+ .loginuid = INVALID_UID,
+ .sessionid = AUDIT_SID_UNSET,
+#endif
+#ifdef CONFIG_PERF_EVENTS
+ .perf_event_mutex = __MUTEX_INITIALIZER(init_task.perf_event_mutex),
+ .perf_event_list = LIST_HEAD_INIT(init_task.perf_event_list),
+#endif
+#ifdef CONFIG_PREEMPT_RCU
+ .rcu_read_lock_nesting = 0,
+ .rcu_read_unlock_special.s = 0,
+ .rcu_node_entry = LIST_HEAD_INIT(init_task.rcu_node_entry),
+ .rcu_blocked_node = NULL,
+#endif
+#ifdef CONFIG_TASKS_RCU
+ .rcu_tasks_holdout = false,
+ .rcu_tasks_holdout_list = LIST_HEAD_INIT(init_task.rcu_tasks_holdout_list),
+ .rcu_tasks_idle_cpu = -1,
+#endif
+#ifdef CONFIG_CPUSETS
+ .mems_allowed_seq = SEQCNT_ZERO(init_task.mems_allowed_seq),
+#endif
+#ifdef CONFIG_RT_MUTEXES
+ .pi_waiters = RB_ROOT_CACHED,
+ .pi_top_task = NULL,
+#endif
+ INIT_PREV_CPUTIME(init_task)
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
+ .vtime.seqcount = SEQCNT_ZERO(init_task.vtime_seqcount),
+ .vtime.starttime = 0,
+ .vtime.state = VTIME_SYS,
+#endif
+#ifdef CONFIG_NUMA_BALANCING
+ .numa_preferred_nid = -1,
+ .numa_group = NULL,
+ .numa_faults = NULL,
+#endif
+#ifdef CONFIG_KASAN
+ .kasan_depth = 1,
+#endif
+#ifdef CONFIG_TRACE_IRQFLAGS
+ .softirqs_enabled = 1,
+#endif
+#ifdef CONFIG_LOCKDEP
+ .lockdep_recursion = 0,
+#endif
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ .ret_stack = NULL,
+#endif
+#if defined(CONFIG_TRACING) && defined(CONFIG_PREEMPT)
+ .trace_recursion = 0,
+#endif
+#ifdef CONFIG_LIVEPATCH
+ .patch_state = KLP_UNDEFINED,
+#endif
+#ifdef CONFIG_SECURITY
+ .security = NULL,
+#endif
+};
+EXPORT_SYMBOL(init_task);
+
+/*
+ * Initial thread structure. Alignment of this is handled by a special
+ * linker map entry.
+ */
+#ifndef CONFIG_THREAD_INFO_IN_TASK
+struct thread_info init_thread_info __init_thread_info = INIT_THREAD_INFO(init_task);
+#endif