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

* 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (413 commits)
  tracing, net: fix net tree and tracing tree merge interaction
  tracing, powerpc: fix powerpc tree and tracing tree interaction
  ring-buffer: do not remove reader page from list on ring buffer free
  function-graph: allow unregistering twice
  trace: make argument 'mem' of trace_seq_putmem() const
  tracing: add missing 'extern' keywords to trace_output.h
  tracing: provide trace_seq_reserve()
  blktrace: print out BLK_TN_MESSAGE properly
  blktrace: extract duplidate code
  blktrace: fix memory leak when freeing struct blk_io_trace
  blktrace: fix blk_probes_ref chaos
  blktrace: make classic output more classic
  blktrace: fix off-by-one bug
  blktrace: fix the original blktrace
  blktrace: fix a race when creating blk_tree_root in debugfs
  blktrace: fix timestamp in binary output
  tracing, Text Edit Lock: cleanup
  tracing: filter fix for TRACE_EVENT_FORMAT events
  ftrace: Using FTRACE_WARN_ON() to check "freed record" in ftrace_release()
  x86: kretprobe-booster interrupt emulation code fix
  ...

Fix up trivial conflicts in
 arch/parisc/include/asm/ftrace.h
 include/linux/memory.h
 kernel/extable.c
 kernel/module.c

1 files changed, 10 insertions, 14 deletions

diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c
index df175cb4564f..de35f200abd3 100644
--- a/kernel/trace/trace_sched_switch.c
+++ b/kernel/trace/trace_sched_switch.c
@@ -18,6 +18,7 @@ static struct trace_array	*ctx_trace;
 static int __read_mostly	tracer_enabled;
 static int			sched_ref;
 static DEFINE_MUTEX(sched_register_mutex);
+static int			sched_stopped;
 
 static void
 probe_sched_switch(struct rq *__rq, struct task_struct *prev,
@@ -28,7 +29,7 @@ probe_sched_switch(struct rq *__rq, struct task_struct *prev,
 	int cpu;
 	int pc;
 
-	if (!sched_ref)
+	if (!sched_ref || sched_stopped)
 		return;
 
 	tracing_record_cmdline(prev);
@@ -43,7 +44,7 @@ probe_sched_switch(struct rq *__rq, struct task_struct *prev,
 	data = ctx_trace->data[cpu];
 
 	if (likely(!atomic_read(&data->disabled)))
-		tracing_sched_switch_trace(ctx_trace, data, prev, next, flags, pc);
+		tracing_sched_switch_trace(ctx_trace, prev, next, flags, pc);
 
 	local_irq_restore(flags);
 }
@@ -66,7 +67,7 @@ probe_sched_wakeup(struct rq *__rq, struct task_struct *wakee, int success)
 	data = ctx_trace->data[cpu];
 
 	if (likely(!atomic_read(&data->disabled)))
-		tracing_sched_wakeup_trace(ctx_trace, data, wakee, current,
+		tracing_sched_wakeup_trace(ctx_trace, wakee, current,
 					   flags, pc);
 
 	local_irq_restore(flags);
@@ -93,7 +94,7 @@ static int tracing_sched_register(void)
 	ret = register_trace_sched_switch(probe_sched_switch);
 	if (ret) {
 		pr_info("sched trace: Couldn't activate tracepoint"
-			" probe to kernel_sched_schedule\n");
+			" probe to kernel_sched_switch\n");
 		goto fail_deprobe_wake_new;
 	}
 
@@ -185,12 +186,6 @@ void tracing_sched_switch_assign_trace(struct trace_array *tr)
 	ctx_trace = tr;
 }
 
-static void start_sched_trace(struct trace_array *tr)
-{
-	tracing_reset_online_cpus(tr);
-	tracing_start_sched_switch_record();
-}
-
 static void stop_sched_trace(struct trace_array *tr)
 {
 	tracing_stop_sched_switch_record();
@@ -199,7 +194,8 @@ static void stop_sched_trace(struct trace_array *tr)
 static int sched_switch_trace_init(struct trace_array *tr)
 {
 	ctx_trace = tr;
-	start_sched_trace(tr);
+	tracing_reset_online_cpus(tr);
+	tracing_start_sched_switch_record();
 	return 0;
 }
 
@@ -211,13 +207,12 @@ static void sched_switch_trace_reset(struct trace_array *tr)
 
 static void sched_switch_trace_start(struct trace_array *tr)
 {
-	tracing_reset_online_cpus(tr);
-	tracing_start_sched_switch();
+	sched_stopped = 0;
 }
 
 static void sched_switch_trace_stop(struct trace_array *tr)
 {
-	tracing_stop_sched_switch();
+	sched_stopped = 1;
 }
 
 static struct tracer sched_switch_trace __read_mostly =
@@ -227,6 +222,7 @@ static struct tracer sched_switch_trace __read_mostly =
 	.reset		= sched_switch_trace_reset,
 	.start		= sched_switch_trace_start,
 	.stop		= sched_switch_trace_stop,
+	.wait_pipe	= poll_wait_pipe,
 #ifdef CONFIG_FTRACE_SELFTEST
 	.selftest    = trace_selftest_startup_sched_switch,
 #endif