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tracing: Have trace buffer point back to trace_array 

The trace buffer has a descriptor pointer that goes back to the trace
array. But it was never assigned. Luckily, nothing uses it (yet), but
it will in the future.

Although nothing currently uses this, if any of the new features get
backported to older kernels, and because this is such a simple change,
I'm marking it for stable too.

Cc: stable@vger.kernel.org # v3.10+
Fixes: 12883efb67 "tracing: Consolidate max_tr into main trace_array structure"
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (Red Hat) 2014-01-14 10:19:46 -05:00 committed by Steven Rostedt
parent a4c35ed241
commit dced341b2d
1 changed files with 2 additions and 0 deletions
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kernel/trace/trace.c
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@ -5914,6 +5914,8 @@ allocate_trace_buffer(struct trace_array *tr, struct trace_buffer *buf, int size
rb_flags = trace_flags & TRACE_ITER_OVERWRITE ? RB_FL_OVERWRITE : 0; rb_flags = trace_flags & TRACE_ITER_OVERWRITE ? RB_FL_OVERWRITE : 0;
buf->tr = tr;
buf->buffer = ring_buffer_alloc(size, rb_flags); buf->buffer = ring_buffer_alloc(size, rb_flags);
if (!buf->buffer) if (!buf->buffer)
return -ENOMEM; return -ENOMEM;