dm cache policy: fix description of lookup fn
authorAlasdair G Kergon <agk@redhat.com>
Fri, 10 May 2013 13:37:17 +0000 (14:37 +0100)
committerAlasdair G Kergon <agk@redhat.com>
Fri, 10 May 2013 13:37:17 +0000 (14:37 +0100)
Correct the documented requirement on the return code from dm cache policy
lookup functions stated in the policy module header file.

Signed-off-by: Alasdair G Kergon <agk@redhat.com>

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