ring-buffer: Fix memleak in ring_buffer_free()

I noticed oprofile memleaked in linux-2.6 current tree,
and tracked this ring-buffer leak.

Signed-off-by: Eric Dumazet <[e-mail]>
LKML-Reference: <[e-mail]>
Cc: [e-mail]
Signed-off-by: Steven Rostedt <[e-mail]>

kernel/trace/ring_buffer.c

···
 
 	put_online_cpus();
 
+	kfree(buffer->buffers);
 	free_cpumask_var(buffer->cpumask);
 
 	kfree(buffer);