NSM: Move nsm_create()

[safe/jmp/linux-2.6] / kernel / fork.c

diff --git a/kernel/fork.c b/kernel/fork.c
index 4e8ca23..43cbf30 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -47,6 +47,7 @@
 #include <linux/mount.h>
 #include <linux/audit.h>
 #include <linux/memcontrol.h>
+#include <linux/ftrace.h>
 #include <linux/profile.h>
 #include <linux/rmap.h>
 #include <linux/acct.h>
@@ -80,6 +81,8 @@ DEFINE_PER_CPU(unsigned long, process_counts) = 0;
 
 __cacheline_aligned DEFINE_RWLOCK(tasklist_lock);  /* outer */
 
+DEFINE_TRACE(sched_process_fork);
+
 int nr_processes(void)
 {
        int cpu;
@@ -137,6 +140,7 @@ void free_task(struct task_struct *tsk)
        prop_local_destroy_single(&tsk->dirties);
        free_thread_info(tsk->stack);
        rt_mutex_debug_task_free(tsk);
+       ftrace_graph_exit_task(tsk);
        free_task_struct(tsk);
 }
 EXPORT_SYMBOL(free_task);
@@ -411,8 +415,8 @@ static struct mm_struct * mm_init(struct mm_struct * mm, struct task_struct *p)
        set_mm_counter(mm, file_rss, 0);
        set_mm_counter(mm, anon_rss, 0);
        spin_lock_init(&mm->page_table_lock);
-       rwlock_init(&mm->ioctx_list_lock);
-       mm->ioctx_list = NULL;
+       spin_lock_init(&mm->ioctx_lock);
+       INIT_HLIST_HEAD(&mm->ioctx_list);
        mm->free_area_cache = TASK_UNMAPPED_BASE;
        mm->cached_hole_size = ~0UL;
        mm_init_owner(mm, p);
@@ -1080,6 +1084,8 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 #ifdef CONFIG_DEBUG_MUTEXES
        p->blocked_on = NULL; /* not blocked yet */
 #endif
+       if (unlikely(ptrace_reparented(current)))
+               ptrace_fork(p, clone_flags);
 
        /* Perform scheduler related setup. Assign this task to a CPU. */
        sched_fork(p, clone_flags);
@@ -1120,6 +1126,8 @@ static struct task_struct *copy_process(unsigned long clone_flags,
                }
        }
 
+       ftrace_graph_init_task(p);
+
        p->pid = pid_nr(pid);
        p->tgid = p->pid;
        if (clone_flags & CLONE_THREAD)
@@ -1128,7 +1136,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
        if (current->nsproxy != p->nsproxy) {
                retval = ns_cgroup_clone(p, pid);
                if (retval)
-                       goto bad_fork_free_pid;
+                       goto bad_fork_free_graph;
        }
 
        p->set_child_tid = (clone_flags & CLONE_CHILD_SETTID) ? child_tidptr : NULL;
@@ -1221,7 +1229,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
                spin_unlock(&current->sighand->siglock);
                write_unlock_irq(&tasklist_lock);
                retval = -ERESTARTNOINTR;
-               goto bad_fork_free_pid;
+               goto bad_fork_free_graph;
        }
 
        if (clone_flags & CLONE_THREAD) {
@@ -1258,6 +1266,8 @@ static struct task_struct *copy_process(unsigned long clone_flags,
        cgroup_post_fork(p);
        return p;
 
+bad_fork_free_graph:
+       ftrace_graph_exit_task(p);
 bad_fork_free_pid:
        if (pid != &init_struct_pid)
                free_pid(pid);