Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (241 commits)
  sched, trace: update trace_sched_wakeup()
  tracing/ftrace: don't trace on early stage of a secondary cpu boot, v3
  Revert "x86: disable X86_PTRACE_BTS"
  ring-buffer: prevent false positive warning
  ring-buffer: fix dangling commit race
  ftrace: enable format arguments checking
  x86, bts: memory accounting
  x86, bts: add fork and exit handling
  ftrace: introduce tracing_reset_online_cpus() helper
  tracing: fix warnings in kernel/trace/trace_sched_switch.c
  tracing: fix warning in kernel/trace/trace.c
  tracing/ring-buffer: remove unused ring_buffer size
  trace: fix task state printout
  ftrace: add not to regex on filtering functions
  trace: better use of stack_trace_enabled for boot up code
  trace: add a way to enable or disable the stack tracer
  x86: entry_64 - introduce FTRACE_ frame macro v2
  tracing/ftrace: add the printk-msg-only option
  tracing/ftrace: use preempt_enable_no_resched_notrace in ring_buffer_time_stamp()
  x86, bts: correctly report invalid bts records
  ...

Fixed up trivial conflict in scripts/recordmcount.pl due to SH bits
being already partly merged by the SH merge.

1 files changed, 12 insertions, 2 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index 4e8ca23c0ede..6144b36cd897 100644
--- 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);
@@ -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);