rcu: remove all rcu head initializations, except on_stack initializations
[linux-2.6.git] / include / linux / init_task.h
1 #ifndef _LINUX__INIT_TASK_H
2 #define _LINUX__INIT_TASK_H
3
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>
9 #include <linux/ipc.h>
10 #include <linux/pid_namespace.h>
11 #include <linux/user_namespace.h>
12 #include <linux/securebits.h>
13 #include <net/net_namespace.h>
14
15 extern struct files_struct init_files;
16 extern struct fs_struct init_fs;
17
18 #define INIT_SIGNALS(sig) {                                             \
19         .count          = ATOMIC_INIT(1),                               \
20         .wait_chldexit  = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
21         .shared_pending = {                                             \
22                 .list = LIST_HEAD_INIT(sig.shared_pending.list),        \
23                 .signal =  {{0}}},                                      \
24         .posix_timers    = LIST_HEAD_INIT(sig.posix_timers),            \
25         .cpu_timers     = INIT_CPU_TIMERS(sig.cpu_timers),              \
26         .rlim           = INIT_RLIMITS,                                 \
27         .cputimer       = {                                             \
28                 .cputime = INIT_CPUTIME,                                \
29                 .running = 0,                                           \
30                 .lock = __SPIN_LOCK_UNLOCKED(sig.cputimer.lock),        \
31         },                                                              \
32 }
33
34 extern struct nsproxy init_nsproxy;
35
36 #define INIT_SIGHAND(sighand) {                                         \
37         .count          = ATOMIC_INIT(1),                               \
38         .action         = { { { .sa_handler = NULL, } }, },             \
39         .siglock        = __SPIN_LOCK_UNLOCKED(sighand.siglock),        \
40         .signalfd_wqh   = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh),  \
41 }
42
43 extern struct group_info init_groups;
44
45 #define INIT_STRUCT_PID {                                               \
46         .count          = ATOMIC_INIT(1),                               \
47         .tasks          = {                                             \
48                 { .first = &init_task.pids[PIDTYPE_PID].node },         \
49                 { .first = &init_task.pids[PIDTYPE_PGID].node },        \
50                 { .first = &init_task.pids[PIDTYPE_SID].node },         \
51         },                                                              \
52         .level          = 0,                                            \
53         .numbers        = { {                                           \
54                 .nr             = 0,                                    \
55                 .ns             = &init_pid_ns,                         \
56                 .pid_chain      = { .next = NULL, .pprev = NULL },      \
57         }, }                                                            \
58 }
59
60 #define INIT_PID_LINK(type)                                     \
61 {                                                               \
62         .node = {                                               \
63                 .next = NULL,                                   \
64                 .pprev = &init_struct_pid.tasks[type].first,    \
65         },                                                      \
66         .pid = &init_struct_pid,                                \
67 }
68
69 #ifdef CONFIG_AUDITSYSCALL
70 #define INIT_IDS \
71         .loginuid = -1, \
72         .sessionid = -1,
73 #else
74 #define INIT_IDS
75 #endif
76
77 /*
78  * Because of the reduced scope of CAP_SETPCAP when filesystem
79  * capabilities are in effect, it is safe to allow CAP_SETPCAP to
80  * be available in the default configuration.
81  */
82 # define CAP_INIT_BSET  CAP_FULL_SET
83
84 #ifdef CONFIG_TREE_PREEMPT_RCU
85 #define INIT_TASK_RCU_PREEMPT(tsk)                                      \
86         .rcu_read_lock_nesting = 0,                                     \
87         .rcu_read_unlock_special = 0,                                   \
88         .rcu_blocked_node = NULL,                                       \
89         .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry),
90 #else
91 #define INIT_TASK_RCU_PREEMPT(tsk)
92 #endif
93
94 extern struct cred init_cred;
95
96 #ifdef CONFIG_PERF_EVENTS
97 # define INIT_PERF_EVENTS(tsk)                                  \
98         .perf_event_mutex =                                             \
99                  __MUTEX_INITIALIZER(tsk.perf_event_mutex),             \
100         .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list),
101 #else
102 # define INIT_PERF_EVENTS(tsk)
103 #endif
104
105 /*
106  *  INIT_TASK is used to set up the first task table, touch at
107  * your own risk!. Base=0, limit=0x1fffff (=2MB)
108  */
109 #define INIT_TASK(tsk)  \
110 {                                                                       \
111         .state          = 0,                                            \
112         .stack          = &init_thread_info,                            \
113         .usage          = ATOMIC_INIT(2),                               \
114         .flags          = PF_KTHREAD,                                   \
115         .lock_depth     = -1,                                           \
116         .prio           = MAX_PRIO-20,                                  \
117         .static_prio    = MAX_PRIO-20,                                  \
118         .normal_prio    = MAX_PRIO-20,                                  \
119         .policy         = SCHED_NORMAL,                                 \
120         .cpus_allowed   = CPU_MASK_ALL,                                 \
121         .mm             = NULL,                                         \
122         .active_mm      = &init_mm,                                     \
123         .se             = {                                             \
124                 .group_node     = LIST_HEAD_INIT(tsk.se.group_node),    \
125         },                                                              \
126         .rt             = {                                             \
127                 .run_list       = LIST_HEAD_INIT(tsk.rt.run_list),      \
128                 .time_slice     = HZ,                                   \
129                 .nr_cpus_allowed = NR_CPUS,                             \
130         },                                                              \
131         .tasks          = LIST_HEAD_INIT(tsk.tasks),                    \
132         .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO), \
133         .ptraced        = LIST_HEAD_INIT(tsk.ptraced),                  \
134         .ptrace_entry   = LIST_HEAD_INIT(tsk.ptrace_entry),             \
135         .real_parent    = &tsk,                                         \
136         .parent         = &tsk,                                         \
137         .children       = LIST_HEAD_INIT(tsk.children),                 \
138         .sibling        = LIST_HEAD_INIT(tsk.sibling),                  \
139         .group_leader   = &tsk,                                         \
140         .real_cred      = &init_cred,                                   \
141         .cred           = &init_cred,                                   \
142         .cred_guard_mutex =                                             \
143                  __MUTEX_INITIALIZER(tsk.cred_guard_mutex),             \
144         .comm           = "swapper",                                    \
145         .thread         = INIT_THREAD,                                  \
146         .fs             = &init_fs,                                     \
147         .files          = &init_files,                                  \
148         .signal         = &init_signals,                                \
149         .sighand        = &init_sighand,                                \
150         .nsproxy        = &init_nsproxy,                                \
151         .pending        = {                                             \
152                 .list = LIST_HEAD_INIT(tsk.pending.list),               \
153                 .signal = {{0}}},                                       \
154         .blocked        = {{0}},                                        \
155         .alloc_lock     = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock),         \
156         .journal_info   = NULL,                                         \
157         .cpu_timers     = INIT_CPU_TIMERS(tsk.cpu_timers),              \
158         .fs_excl        = ATOMIC_INIT(0),                               \
159         .pi_lock        = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock),        \
160         .timer_slack_ns = 50000, /* 50 usec default slack */            \
161         .pids = {                                                       \
162                 [PIDTYPE_PID]  = INIT_PID_LINK(PIDTYPE_PID),            \
163                 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID),           \
164                 [PIDTYPE_SID]  = INIT_PID_LINK(PIDTYPE_SID),            \
165         },                                                              \
166         .dirties = INIT_PROP_LOCAL_SINGLE(dirties),                     \
167         INIT_IDS                                                        \
168         INIT_PERF_EVENTS(tsk)                                           \
169         INIT_TRACE_IRQFLAGS                                             \
170         INIT_LOCKDEP                                                    \
171         INIT_FTRACE_GRAPH                                               \
172         INIT_TRACE_RECURSION                                            \
173         INIT_TASK_RCU_PREEMPT(tsk)                                      \
174 }
175
176
177 #define INIT_CPU_TIMERS(cpu_timers)                                     \
178 {                                                                       \
179         LIST_HEAD_INIT(cpu_timers[0]),                                  \
180         LIST_HEAD_INIT(cpu_timers[1]),                                  \
181         LIST_HEAD_INIT(cpu_timers[2]),                                  \
182 }
183
184 /* Attach to the init_task data structure for proper alignment */
185 #define __init_task_data __attribute__((__section__(".data.init_task")))
186
187
188 #endif