1 #ifndef _LINUX__INIT_TASK_H
2 #define _LINUX__INIT_TASK_H
4 #include <linux/rcupdate.h>
5 #include <linux/irqflags.h>
6 #include <linux/utsname.h>
7 #include <linux/lockdep.h>
8 #include <linux/ftrace.h>
10 #include <linux/pid_namespace.h>
11 #include <linux/user_namespace.h>
12 #include <linux/securebits.h>
13 #include <net/net_namespace.h>
16 # define INIT_PUSHABLE_TASKS(tsk) \
17 .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO),
19 # define INIT_PUSHABLE_TASKS(tsk)
22 extern struct files_struct init_files;
23 extern struct fs_struct init_fs;
26 #define INIT_THREADGROUP_FORK_LOCK(sig) \
27 .threadgroup_fork_lock = \
28 __RWSEM_INITIALIZER(sig.threadgroup_fork_lock),
30 #define INIT_THREADGROUP_FORK_LOCK(sig)
34 #define INIT_CPUSET_SEQ \
35 .mems_allowed_seq = SEQCNT_ZERO,
37 #define INIT_CPUSET_SEQ
40 #define INIT_SIGNALS(sig) { \
42 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
44 .list = LIST_HEAD_INIT(sig.shared_pending.list), \
46 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \
47 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \
48 .rlim = INIT_RLIMITS, \
50 .cputime = INIT_CPUTIME, \
52 .lock = __RAW_SPIN_LOCK_UNLOCKED(sig.cputimer.lock), \
55 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \
56 INIT_THREADGROUP_FORK_LOCK(sig) \
59 extern struct nsproxy init_nsproxy;
61 #define INIT_SIGHAND(sighand) { \
62 .count = ATOMIC_INIT(1), \
63 .action = { { { .sa_handler = SIG_DFL, } }, }, \
64 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \
65 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \
68 extern struct group_info init_groups;
70 #define INIT_STRUCT_PID { \
71 .count = ATOMIC_INIT(1), \
81 .pid_chain = { .next = NULL, .pprev = NULL }, \
85 #define INIT_PID_LINK(type) \
91 .pid = &init_struct_pid, \
94 #ifdef CONFIG_AUDITSYSCALL
102 #ifdef CONFIG_RCU_BOOST
103 #define INIT_TASK_RCU_BOOST() \
104 .rcu_boost_mutex = NULL,
106 #define INIT_TASK_RCU_BOOST()
108 #ifdef CONFIG_TREE_PREEMPT_RCU
109 #define INIT_TASK_RCU_TREE_PREEMPT() \
110 .rcu_blocked_node = NULL,
112 #define INIT_TASK_RCU_TREE_PREEMPT(tsk)
114 #ifdef CONFIG_PREEMPT_RCU
115 #define INIT_TASK_RCU_PREEMPT(tsk) \
116 .rcu_read_lock_nesting = 0, \
117 .rcu_read_unlock_special = 0, \
118 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \
119 INIT_TASK_RCU_TREE_PREEMPT() \
120 INIT_TASK_RCU_BOOST()
122 #define INIT_TASK_RCU_PREEMPT(tsk)
125 extern struct cred init_cred;
127 #ifdef CONFIG_PERF_EVENTS
128 # define INIT_PERF_EVENTS(tsk) \
129 .perf_event_mutex = \
130 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \
131 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list),
133 # define INIT_PERF_EVENTS(tsk)
136 #define INIT_TASK_COMM "swapper"
139 * INIT_TASK is used to set up the first task table, touch at
140 * your own risk!. Base=0, limit=0x1fffff (=2MB)
142 #define INIT_TASK(tsk) \
145 .stack = &init_thread_info, \
146 .usage = ATOMIC_INIT(2), \
147 .flags = PF_KTHREAD, \
148 .prio = MAX_PRIO-20, \
149 .static_prio = MAX_PRIO-20, \
150 .normal_prio = MAX_PRIO-20, \
151 .policy = SCHED_NORMAL, \
152 .cpus_allowed = CPU_MASK_ALL, \
154 .active_mm = &init_mm, \
156 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \
159 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \
161 .nr_cpus_allowed = NR_CPUS, \
163 .tasks = LIST_HEAD_INIT(tsk.tasks), \
164 INIT_PUSHABLE_TASKS(tsk) \
165 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \
166 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \
167 .real_parent = &tsk, \
169 .children = LIST_HEAD_INIT(tsk.children), \
170 .sibling = LIST_HEAD_INIT(tsk.sibling), \
171 .group_leader = &tsk, \
172 RCU_INIT_POINTER(.real_cred, &init_cred), \
173 RCU_INIT_POINTER(.cred, &init_cred), \
174 .comm = INIT_TASK_COMM, \
175 .thread = INIT_THREAD, \
177 .files = &init_files, \
178 .signal = &init_signals, \
179 .sighand = &init_sighand, \
180 .nsproxy = &init_nsproxy, \
182 .list = LIST_HEAD_INIT(tsk.pending.list), \
185 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \
186 .journal_info = NULL, \
187 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \
188 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \
189 .timer_slack_ns = 50000, /* 50 usec default slack */ \
191 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \
192 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \
193 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \
195 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \
197 INIT_PERF_EVENTS(tsk) \
198 INIT_TRACE_IRQFLAGS \
201 INIT_TRACE_RECURSION \
202 INIT_TASK_RCU_PREEMPT(tsk) \
207 #define INIT_CPU_TIMERS(cpu_timers) \
209 LIST_HEAD_INIT(cpu_timers[0]), \
210 LIST_HEAD_INIT(cpu_timers[1]), \
211 LIST_HEAD_INIT(cpu_timers[2]), \
214 /* Attach to the init_task data structure for proper alignment */
215 #define __init_task_data __attribute__((__section__(".data..init_task")))