X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=kernel%2Ffork.c;h=0c969f4fade05391a8faaf6a2ff30ad1837861db;hb=1020387f5f3b52929b387103cf976321981f8e26;hp=ddafdfac9456e151b2d8731b52475a5af4ca68e1;hpb=cfa76f024f7c9e65169425804e5b32e71f66d0ee;p=linux-2.6

diff --git a/kernel/fork.c b/kernel/fork.c
index ddafdfac94..0c969f4fad 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1045,6 +1045,10 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 	copy_flags(clone_flags, p);
 	INIT_LIST_HEAD(&p->children);
 	INIT_LIST_HEAD(&p->sibling);
+#ifdef CONFIG_PREEMPT_RCU
+	p->rcu_read_lock_nesting = 0;
+	p->rcu_flipctr_idx = 0;
+#endif /* #ifdef CONFIG_PREEMPT_RCU */
 	p->vfork_done = NULL;
 	spin_lock_init(&p->alloc_lock);
 
@@ -1056,6 +1060,13 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 	p->gtime = cputime_zero;
 	p->utimescaled = cputime_zero;
 	p->stimescaled = cputime_zero;
+	p->prev_utime = cputime_zero;
+	p->prev_stime = cputime_zero;
+
+#ifdef CONFIG_DETECT_SOFTLOCKUP
+	p->last_switch_count = 0;
+	p->last_switch_timestamp = 0;
+#endif
 
 #ifdef CONFIG_TASK_XACCT
 	p->rchar = 0;		/* I/O counter: bytes read */
@@ -1121,6 +1132,9 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 	p->blocked_on = NULL; /* not blocked yet */
 #endif
 
+	/* Perform scheduler related setup. Assign this task to a CPU. */
+	sched_fork(p, clone_flags);
+
 	if ((retval = security_task_alloc(p)))
 		goto bad_fork_cleanup_policy;
 	if ((retval = audit_alloc(p)))
@@ -1210,9 +1224,6 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 	INIT_LIST_HEAD(&p->ptrace_children);
 	INIT_LIST_HEAD(&p->ptrace_list);
 
-	/* Perform scheduler related setup. Assign this task to a CPU. */
-	sched_fork(p, clone_flags);
-
 	/* Now that the task is set up, run cgroup callbacks if
 	 * necessary. We need to run them before the task is visible
 	 * on the tasklist. */
@@ -1235,6 +1246,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 	 * parent's CPU). This avoids alot of nasty races.
 	 */
 	p->cpus_allowed = current->cpus_allowed;
+	p->rt.nr_cpus_allowed = current->rt.nr_cpus_allowed;
 	if (unlikely(!cpu_isset(task_cpu(p), p->cpus_allowed) ||
 			!cpu_online(task_cpu(p))))
 		set_task_cpu(p, smp_processor_id());
@@ -1290,23 +1302,14 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 			__ptrace_link(p, current->parent);
 
 		if (thread_group_leader(p)) {
-			if (clone_flags & CLONE_NEWPID) {
+			if (clone_flags & CLONE_NEWPID)
 				p->nsproxy->pid_ns->child_reaper = p;
-				p->signal->tty = NULL;
-				set_task_pgrp(p, p->pid);
-				set_task_session(p, p->pid);
-				attach_pid(p, PIDTYPE_PGID, pid);
-				attach_pid(p, PIDTYPE_SID, pid);
-			} else {
-				p->signal->tty = current->signal->tty;
-				set_task_pgrp(p, task_pgrp_nr(current));
-				set_task_session(p, task_session_nr(current));
-				attach_pid(p, PIDTYPE_PGID,
-						task_pgrp(current));
-				attach_pid(p, PIDTYPE_SID,
-						task_session(current));
-			}
 
+			p->signal->tty = current->signal->tty;
+			set_task_pgrp(p, task_pgrp_nr(current));
+			set_task_session(p, task_session_nr(current));
+			attach_pid(p, PIDTYPE_PGID, task_pgrp(current));
+			attach_pid(p, PIDTYPE_SID, task_session(current));
 			list_add_tail_rcu(&p->tasks, &init_task.tasks);
 			__get_cpu_var(process_counts)++;
 		}