Merge branches 'tracing/docs', 'tracing/filters', 'tracing/ftrace', 'tracing/kprobes...

[deliverable/linux.git] / kernel / trace / trace.c

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 89f0c2544ad06a418614a5382874732c8c660ef9..a0174a40c563a5141de2d33735ae0f16c791a6ae 100644 (file)
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -255,7 +255,7 @@ static DECLARE_WAIT_QUEUE_HEAD(trace_wait);
 
 /* trace_flags holds trace_options default values */
 unsigned long trace_flags = TRACE_ITER_PRINT_PARENT | TRACE_ITER_PRINTK |
-       TRACE_ITER_ANNOTATE | TRACE_ITER_CONTEXT_INFO;
+       TRACE_ITER_ANNOTATE | TRACE_ITER_CONTEXT_INFO | TRACE_ITER_SLEEP_TIME;
 
 /**
  * trace_wake_up - wake up tasks waiting for trace input
@@ -316,6 +316,7 @@ static const char *trace_options[] = {
        "context-info",
        "latency-format",
        "global-clock",
+       "sleep-time",
        NULL
 };
 
@@ -382,7 +383,7 @@ ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf, size_t cnt)
        return cnt;
 }
 
-ssize_t trace_seq_to_buffer(struct trace_seq *s, void *buf, size_t cnt)
+static ssize_t trace_seq_to_buffer(struct trace_seq *s, void *buf, size_t cnt)
 {
        int len;
        void *ret;
@@ -3535,6 +3536,9 @@ struct dentry *tracing_init_dentry(void)
        if (d_tracer)
                return d_tracer;
 
+       if (!debugfs_initialized())
+               return NULL;
+
        d_tracer = debugfs_create_dir("tracing", NULL);
 
        if (!d_tracer && !once) {