[PATCH] initialise page->private
From: Nathan Scott <nathans@sgi.com> XFS wants to use page->private as a bitmap of uptodate indicators for sub-page-sized blocks (which is one of the things ->provate was intended for). But someone needs to initialise ->private somewhere. best to do it in the page allocator, so the zeroness of a new page's ->private becomes a system-wide thing.
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