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tracing: Prevent deleting instances when they are being read

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Add a ref count to the trace_array structure and prevent removal
of instances that have open descriptors.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (Red Hat) 2013-03-06 15:27:24 -05:00 • committed by Steven Rostedt
parent 121aaee7b0
commit a695cb5816
2 changed files with 24 additions and 0 deletions
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kernel/trace/trace.h
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@ -219,6 +219,7 @@ struct trace_array {
struct list_head systems;
struct list_head events;
struct task_struct *waiter;
int ref;
};
enum {