From: Arne Redlich <arne.redlich@googlemail.com>
Date: Fri, 16 Mar 2012 07:19:33 +0000 (+0100)
Subject: drbd: bm_page_async_io: properly initialize page->private
X-Git-Tag: v3.5-rc1~41^2^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0c7db27920a87a8db73ca521b527617eceec3bca;p=pandora-kernel.git

drbd: bm_page_async_io: properly initialize page->private

If bm_page_async_io is advised to use a new page for I/O
(BM_AIO_COPY_PAGES is set), it will get it from a mempool.
Once the mempool has to dip into its reserves the page is
not reinitialized, i.e. page->private contains garbage, which
will lead to various problems once the I/O completes (dereferences
of NULL pointers, the submitting thread getting stuck in D-state,
 ...).

Signed-off-by: Arne Redlich <arne.redlich@googlemail.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
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