[Bug 56401] callgraph support ?

[Robert Collins]

Public bug reported:

Hi,
  I'm told that callgraph is built into the dapper kernels, but oprofile
does not seem to get anything useful out of it - 

specificially, rather than getting a callgraph, it shows every function
sampled as having no parents and no children.

 affects /distros/ubuntu/linux-source-2.6.15
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** Affects: linux-source-2.6.15 (Ubuntu)
     Importance: Untriaged
         Status: Unconfirmed

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callgraph support ?
https://launchpad.net/bugs/56401