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: (105 commits)
  ring-buffer: only enable ring_buffer_swap_cpu when needed
  ring-buffer: check for swapped buffers in start of committing
  tracing: report error in trace if we fail to swap latency buffer
  tracing: add trace_array_printk for internal tracers to use
  tracing: pass around ring buffer instead of tracer
  tracing: make tracing_reset safe for external use
  tracing: use timestamp to determine start of latency traces
  tracing: Remove mentioning of legacy latency_trace file from documentation
  tracing/filters: Defer pred allocation, fix memory leak
  tracing: remove users of tracing_reset
  tracing: disable buffers and synchronize_sched before resetting
  tracing: disable update max tracer while reading trace
  tracing: print out start and stop in latency traces
  ring-buffer: disable all cpu buffers when one finds a problem
  ring-buffer: do not count discarded events
  ring-buffer: remove ring_buffer_event_discard
  ring-buffer: fix ring_buffer_read crossing pages
  ring-buffer: remove unnecessary cpu_relax
  ring-buffer: do not swap buffers during a commit
  ring-buffer: do not reset while in a commit
  ...

1 files changed, 9 insertions, 7 deletions

diff --git a/kernel/trace/trace_boot.c b/kernel/trace/trace_boot.c
index a29ef23ffb47..19bfc75d467e 100644
--- a/kernel/trace/trace_boot.c
+++ b/kernel/trace/trace_boot.c
@@ -41,14 +41,12 @@ void disable_boot_trace(void)
 
 static int boot_trace_init(struct trace_array *tr)
 {
-        int cpu;
         boot_trace = tr;
 
         if (!tr)
                 return 0;
 
-        for_each_cpu(cpu, cpu_possible_mask)
-                tracing_reset(tr, cpu);
+        tracing_reset_online_cpus(tr);
 
         tracing_sched_switch_assign_trace(tr);
         return 0;
@@ -132,6 +130,7 @@ struct tracer boot_tracer __read_mostly =
 void trace_boot_call(struct boot_trace_call *bt, initcall_t fn)
 {
         struct ring_buffer_event *event;
+        struct ring_buffer *buffer;
         struct trace_boot_call *entry;
         struct trace_array *tr = boot_trace;
 
@@ -144,13 +143,14 @@ void trace_boot_call(struct boot_trace_call *bt, initcall_t fn)
         sprint_symbol(bt->func, (unsigned long)fn);
         preempt_disable();
 
-        event = trace_buffer_lock_reserve(tr, TRACE_BOOT_CALL,
+        buffer = tr->buffer;
+        event = trace_buffer_lock_reserve(buffer, TRACE_BOOT_CALL,
                                           sizeof(*entry), 0, 0);
         if (!event)
                 goto out;
         entry   = ring_buffer_event_data(event);
         entry->boot_call = *bt;
-        trace_buffer_unlock_commit(tr, event, 0, 0);
+        trace_buffer_unlock_commit(buffer, event, 0, 0);
  out:
         preempt_enable();
 }
@@ -158,6 +158,7 @@ void trace_boot_call(struct boot_trace_call *bt, initcall_t fn)
 void trace_boot_ret(struct boot_trace_ret *bt, initcall_t fn)
 {
         struct ring_buffer_event *event;
+        struct ring_buffer *buffer;
         struct trace_boot_ret *entry;
         struct trace_array *tr = boot_trace;
 
@@ -167,13 +168,14 @@ void trace_boot_ret(struct boot_trace_ret *bt, initcall_t fn)
         sprint_symbol(bt->func, (unsigned long)fn);
         preempt_disable();
 
-        event = trace_buffer_lock_reserve(tr, TRACE_BOOT_RET,
+        buffer = tr->buffer;
+        event = trace_buffer_lock_reserve(buffer, TRACE_BOOT_RET,
                                           sizeof(*entry), 0, 0);
         if (!event)
                 goto out;
         entry   = ring_buffer_event_data(event);
         entry->boot_ret = *bt;
-        trace_buffer_unlock_commit(tr, event, 0, 0);
+        trace_buffer_unlock_commit(buffer, event, 0, 0);
  out:
         preempt_enable();
 }