Re: [PATCH 1/2] trace_events_filter: use rcu_assign_pointer() whensetting ftrace_event_call->filter

[Steven Rostedt]

On Wed, 2011-11-23 at 08:06 -0800, Tejun Heo wrote:

> So, synchronized_sched() being called after isn't relevant.  We want
> smp_wmb() between data structure initialization and assignment of the
> new pointer.

Ah, you're saying that we need to guarantee that the allocated filter is
seen before we update the call->filter to point to it. OK, fair enough,
this does look like a bug fix.

Is it big enough to be considered for stable?

-- Steve


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