[PATCH 08/23] io-controller: cfq changes to use hierarchical fair queuing code in elevaotor layer

[Rik van Riel]

Vivek Goyal wrote:
> Make cfq hierarhical.
> 
> Signed-off-by: Nauman Rafique <nauman at google.com>
> Signed-off-by: Fabio Checconi <fabio at gandalf.sssup.it>
> Signed-off-by: Paolo Valente <paolo.valente at unimore.it>
> Signed-off-by: Aristeu Rozanski <aris at redhat.com>
> Signed-off-by: Vivek Goyal <vgoyal at redhat.com>

Acked-by: Rik van Riel <riel at redhat.com>

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