1 files changed, 21 insertions, 19 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index da4a6a10d088..051f090d40c1 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -76,6 +76,9 @@
 
 #include <trace/events/sched.h>
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/task.h>
+
 /*
  * Protected counters by write_lock_irq(&tasklist_lock)
  */
@@ -870,6 +873,7 @@ static int copy_io(unsigned long clone_flags, struct task_struct *tsk)
 {
 #ifdef CONFIG_BLOCK
         struct io_context *ioc = current->io_context;
+        struct io_context *new_ioc;
 
         if (!ioc)
                 return 0;
@@ -881,11 +885,12 @@ static int copy_io(unsigned long clone_flags, struct task_struct *tsk)
                 if (unlikely(!tsk->io_context))
                         return -ENOMEM;
         } else if (ioprio_valid(ioc->ioprio)) {
-                tsk->io_context = alloc_io_context(GFP_KERNEL, -1);
-                if (unlikely(!tsk->io_context))
+                new_ioc = get_task_io_context(tsk, GFP_KERNEL, NUMA_NO_NODE);
+                if (unlikely(!new_ioc))
                         return -ENOMEM;
 
-                tsk->io_context->ioprio = ioc->ioprio;
+                new_ioc->ioprio = ioc->ioprio;
+                put_io_context(new_ioc, NULL);
         }
 #endif
         return 0;
@@ -972,7 +977,7 @@ static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
         sched_autogroup_fork(sig);
 
 #ifdef CONFIG_CGROUPS
-        init_rwsem(&sig->threadgroup_fork_lock);
+        init_rwsem(&sig->group_rwsem);
 #endif
 
         sig->oom_adj = current->signal->oom_adj;
@@ -992,7 +997,6 @@ static void copy_flags(unsigned long clone_flags, struct task_struct *p)
         new_flags |= PF_FORKNOEXEC;
         new_flags |= PF_STARTING;
         p->flags = new_flags;
-        clear_freeze_flag(p);
 }
 
 SYSCALL_DEFINE1(set_tid_address, int __user *, tidptr)
@@ -1023,8 +1027,8 @@ void mm_init_owner(struct mm_struct *mm, struct task_struct *p)
  */
 static void posix_cpu_timers_init(struct task_struct *tsk)
 {
-        tsk->cputime_expires.prof_exp = cputime_zero;
-        tsk->cputime_expires.virt_exp = cputime_zero;
+        tsk->cputime_expires.prof_exp = 0;
+        tsk->cputime_expires.virt_exp = 0;
         tsk->cputime_expires.sched_exp = 0;
         INIT_LIST_HEAD(&tsk->cpu_timers[0]);
         INIT_LIST_HEAD(&tsk->cpu_timers[1]);
@@ -1132,14 +1136,10 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 
         init_sigpending(&p->pending);
 
-        p->utime = cputime_zero;
-        p->stime = cputime_zero;
-        p->gtime = cputime_zero;
-        p->utimescaled = cputime_zero;
-        p->stimescaled = cputime_zero;
+        p->utime = p->stime = p->gtime = 0;
+        p->utimescaled = p->stimescaled = 0;
 #ifndef CONFIG_VIRT_CPU_ACCOUNTING
-        p->prev_utime = cputime_zero;
-        p->prev_stime = cputime_zero;
+        p->prev_utime = p->prev_stime = 0;
 #endif
 #if defined(SPLIT_RSS_COUNTING)
         memset(&p->rss_stat, 0, sizeof(p->rss_stat));
@@ -1158,7 +1158,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
         p->io_context = NULL;
         p->audit_context = NULL;
         if (clone_flags & CLONE_THREAD)
-                threadgroup_fork_read_lock(current);
+                threadgroup_change_begin(current);
         cgroup_fork(p);
 #ifdef CONFIG_NUMA
         p->mempolicy = mpol_dup(p->mempolicy);
@@ -1296,6 +1296,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 
         p->nr_dirtied = 0;
         p->nr_dirtied_pause = 128 >> (PAGE_SHIFT - 10);
+        p->dirty_paused_when = 0;
 
         /*
          * Ok, make it visible to the rest of the system.
@@ -1373,8 +1374,11 @@ static struct task_struct *copy_process(unsigned long clone_flags,
         proc_fork_connector(p);
         cgroup_post_fork(p);
         if (clone_flags & CLONE_THREAD)
-                threadgroup_fork_read_unlock(current);
+                threadgroup_change_end(current);
         perf_event_fork(p);
+
+        trace_task_newtask(p, clone_flags);
+
         return p;
 
 bad_fork_free_pid:
@@ -1408,7 +1412,7 @@ bad_fork_cleanup_policy:
 bad_fork_cleanup_cgroup:
 #endif
         if (clone_flags & CLONE_THREAD)
-                threadgroup_fork_read_unlock(current);
+                threadgroup_change_end(current);
         cgroup_exit(p, cgroup_callbacks_done);
         delayacct_tsk_free(p);
         module_put(task_thread_info(p)->exec_domain->module);
@@ -1523,8 +1527,6 @@ long do_fork(unsigned long clone_flags,
                         init_completion(&vfork);
                 }
 
-                audit_finish_fork(p);
-
                 /*
                  * We set PF_STARTING at creation in case tracing wants to
                  * use this to distinguish a fully live task from one that