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Diffstat (limited to 'kernel/trace')
-rw-r--r--kernel/trace/trace.c28
-rw-r--r--kernel/trace/trace.h4
-rw-r--r--kernel/trace/trace_events_hist.c6
3 files changed, 17 insertions, 21 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index f979220238a5..b15436ff85e8 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -2737,12 +2737,13 @@ trace_event_buffer_lock_reserve(struct trace_buffer **current_rb,
unsigned int trace_ctx)
{
struct ring_buffer_event *entry;
+ struct trace_array *tr = trace_file->tr;
int val;
- *current_rb = trace_file->tr->array_buffer.buffer;
+ *current_rb = tr->array_buffer.buffer;
- if (!ring_buffer_time_stamp_abs(*current_rb) && (trace_file->flags &
- (EVENT_FILE_FL_SOFT_DISABLED | EVENT_FILE_FL_FILTERED)) &&
+ if (!tr->no_filter_buffering_ref &&
+ (trace_file->flags & (EVENT_FILE_FL_SOFT_DISABLED | EVENT_FILE_FL_FILTERED)) &&
(entry = this_cpu_read(trace_buffered_event))) {
/* Try to use the per cpu buffer first */
val = this_cpu_inc_return(trace_buffered_event_cnt);
@@ -6971,31 +6972,26 @@ static int tracing_time_stamp_mode_open(struct inode *inode, struct file *file)
return ret;
}
-int tracing_set_time_stamp_abs(struct trace_array *tr, bool abs)
+/*
+ * Set or disable using the per CPU trace_buffer_event when possible.
+ */
+int tracing_set_filter_buffering(struct trace_array *tr, bool set)
{
int ret = 0;
mutex_lock(&trace_types_lock);
- if (abs && tr->time_stamp_abs_ref++)
+ if (set && tr->no_filter_buffering_ref++)
goto out;
- if (!abs) {
- if (WARN_ON_ONCE(!tr->time_stamp_abs_ref)) {
+ if (!set) {
+ if (WARN_ON_ONCE(!tr->no_filter_buffering_ref)) {
ret = -EINVAL;
goto out;
}
- if (--tr->time_stamp_abs_ref)
- goto out;
+ --tr->no_filter_buffering_ref;
}
-
- ring_buffer_set_time_stamp_abs(tr->array_buffer.buffer, abs);
-
-#ifdef CONFIG_TRACER_MAX_TRACE
- if (tr->max_buffer.buffer)
- ring_buffer_set_time_stamp_abs(tr->max_buffer.buffer, abs);
-#endif
out:
mutex_unlock(&trace_types_lock);
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 798773178d7e..f2a7a72825c7 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -352,7 +352,7 @@ struct trace_array {
/* function tracing enabled */
int function_enabled;
#endif
- int time_stamp_abs_ref;
+ int no_filter_buffering_ref;
struct list_head hist_vars;
#ifdef CONFIG_TRACER_SNAPSHOT
struct cond_snapshot *cond_snapshot;
@@ -372,7 +372,7 @@ extern int tracing_check_open_get_tr(struct trace_array *tr);
extern struct trace_array *trace_array_find(const char *instance);
extern struct trace_array *trace_array_find_get(const char *instance);
-extern int tracing_set_time_stamp_abs(struct trace_array *tr, bool abs);
+extern int tracing_set_filter_buffering(struct trace_array *tr, bool set);
extern int tracing_set_clock(struct trace_array *tr, const char *clockstr);
extern bool trace_clock_in_ns(struct trace_array *tr);
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index 45986cb4637e..c1abd63f1d6c 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -5484,7 +5484,7 @@ static int hist_register_trigger(char *glob, struct event_trigger_ops *ops,
goto out;
}
- tracing_set_time_stamp_abs(file->tr, true);
+ tracing_set_filter_buffering(file->tr, true);
}
if (named_data)
@@ -5592,7 +5592,7 @@ static void hist_unregister_trigger(char *glob, struct event_trigger_ops *ops,
if (hist_data->enable_timestamps) {
if (!hist_data->remove || unregistered)
- tracing_set_time_stamp_abs(file->tr, false);
+ tracing_set_filter_buffering(file->tr, false);
}
}
@@ -5639,7 +5639,7 @@ static void hist_unreg_all(struct trace_event_file *file)
update_cond_flag(file);
if (hist_data->enable_timestamps)
- tracing_set_time_stamp_abs(file->tr, false);
+ tracing_set_filter_buffering(file->tr, false);
if (test->ops->free)
test->ops->free(test->ops, test);
}