powerpc/mm: Add better comment on careful_allocation()
authorDave Hansen <dave@linux.vnet.ibm.com>
Tue, 9 Dec 2008 08:21:32 +0000 (08:21 +0000)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Thu, 8 Jan 2009 05:25:08 +0000 (16:25 +1100)
The behavior in careful_allocation() really confused me
at first.  Add a comment to hopefully make it easier
on the next doofus that looks at it.

Signed-off-by: Dave Hansen <dave@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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