tracing: Move trace_flags from global to a trace_array field

In preparation to make trace options per instance, the global trace_flags
needs to be moved from being a global variable to a field within the trace
instance trace_array structure.

There's still more work to do, as there's some functions that use
trace_flags without passing in a way to get to the current_trace array. For
those, the global_trace is used directly (from trace.c). This includes
setting and clearing the trace_flags. This means that when a new instance is
created, it just gets the trace_flags of the global_trace and will not be
able to modify them. Depending on the functions that have access to the
trace_array, the flags of an instance may not affect parts of its trace,
where the global_trace is used. These will be fixed in future changes.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 29 insertions, 21 deletions

diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index 86e45c2658e4..92382af7a213 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -112,8 +112,8 @@ enum {
 };
 
 static void
-print_graph_duration(unsigned long long duration, struct trace_seq *s,
-                     u32 flags);
+print_graph_duration(struct trace_array *tr, unsigned long long duration,
+                     struct trace_seq *s, u32 flags);
 
 /* Add a function return address to the trace stack on thread info.*/
 int
@@ -658,6 +658,7 @@ static void
 print_graph_irq(struct trace_iterator *iter, unsigned long addr,
                 enum trace_type type, int cpu, pid_t pid, u32 flags)
 {
+        struct trace_array *tr = iter->tr;
         struct trace_seq *s = &iter->seq;
         struct trace_entry *ent = iter->ent;
 
@@ -

#endif /* CONFIG_PPC64 */

#ifdef __KERNEL__
extern struct vdso_data *vdso_data;
#endif

#endif /* __ASSEMBLY__ */

#endif /* __KERNEL__ */
#endif /* _SYSTEMCFG_H */