tracing: Make ftrace_trace_stack() depend on general trace_array flag
In preparation for the multi buffer instances to have their own trace_flags,
the check in ftrace_trace_stack() needs to test the trace_array descriptor
flag that is for the current event, not the global_trace descriptor.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 5f48188..51697b4 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -482,7 +482,8 @@
static void __ftrace_trace_stack(struct ring_buffer *buffer,
unsigned long flags,
int skip, int pc, struct pt_regs *regs);
-static inline void ftrace_trace_stack(struct ring_buffer *buffer,
+static inline void ftrace_trace_stack(struct trace_array *tr,
+ struct ring_buffer *buffer,
unsigned long flags,
int skip, int pc, struct pt_regs *regs);
@@ -492,7 +493,8 @@
int skip, int pc, struct pt_regs *regs)
{
}
-static inline void ftrace_trace_stack(struct ring_buffer *buffer,
+static inline void ftrace_trace_stack(struct trace_array *tr,
+ struct ring_buffer *buffer,
unsigned long flags,
int skip, int pc, struct pt_regs *regs)
{
@@ -574,7 +576,7 @@
entry->buf[size] = '\0';
__buffer_unlock_commit(buffer, event);
- ftrace_trace_stack(buffer, irq_flags, 4, pc, NULL);
+ ftrace_trace_stack(&global_trace, buffer, irq_flags, 4, pc, NULL);
return size;
}
@@ -614,7 +616,7 @@
entry->str = str;
__buffer_unlock_commit(buffer, event);
- ftrace_trace_stack(buffer, irq_flags, 4, pc, NULL);
+ ftrace_trace_stack(&global_trace, buffer, irq_flags, 4, pc, NULL);
return 1;
}
@@ -1691,7 +1693,7 @@
{
__buffer_unlock_commit(buffer, event);
- ftrace_trace_stack(buffer, flags, 6, pc, NULL);
+ ftrace_trace_stack(tr, buffer, flags, 6, pc, NULL);
ftrace_trace_userstack(buffer, flags, pc);
}
EXPORT_SYMBOL_GPL(trace_buffer_unlock_commit);
@@ -1743,7 +1745,7 @@
{
__buffer_unlock_commit(buffer, event);
- ftrace_trace_stack(buffer, flags, 6, pc, regs);
+ ftrace_trace_stack(tr, buffer, flags, 6, pc, regs);
ftrace_trace_userstack(buffer, flags, pc);
}
EXPORT_SYMBOL_GPL(trace_buffer_unlock_commit_regs);
@@ -1872,11 +1874,12 @@
}
-static inline void ftrace_trace_stack(struct ring_buffer *buffer,
+static inline void ftrace_trace_stack(struct trace_array *tr,
+ struct ring_buffer *buffer,
unsigned long flags,
int skip, int pc, struct pt_regs *regs)
{
- if (!(global_trace.trace_flags & TRACE_ITER_STACKTRACE))
+ if (!(tr->trace_flags & TRACE_ITER_STACKTRACE))
return;
__ftrace_trace_stack(buffer, flags, skip, pc, regs);
@@ -2164,7 +2167,7 @@
memcpy(entry->buf, tbuffer, sizeof(u32) * len);
if (!call_filter_check_discard(call, entry, buffer, event)) {
__buffer_unlock_commit(buffer, event);
- ftrace_trace_stack(buffer, flags, 6, pc, NULL);
+ ftrace_trace_stack(tr, buffer, flags, 6, pc, NULL);
}
out:
@@ -2216,7 +2219,7 @@
memcpy(&entry->buf, tbuffer, len + 1);
if (!call_filter_check_discard(call, entry, buffer, event)) {
__buffer_unlock_commit(buffer, event);
- ftrace_trace_stack(buffer, flags, 6, pc, NULL);
+ ftrace_trace_stack(&global_trace, buffer, flags, 6, pc, NULL);
}
out:
preempt_enable_notrace();
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 0f39411..57c9e70 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -2941,15 +2941,15 @@
static __init void event_trace_self_test_with_function(void)
{
int ret;
+ event_tr = top_trace_array();
+ if (WARN_ON(!event_tr))
+ return;
ret = register_ftrace_function(&trace_ops);
if (WARN_ON(ret < 0)) {
pr_info("Failed to enable function tracer for event tests\n");
return;
}
pr_info("Running tests again, along with the function tracer\n");
- event_tr = top_trace_array();
- if (WARN_ON(!event_tr))
- return;
event_trace_self_tests();
unregister_ftrace_function(&trace_ops);
}