tree b93a1f8cc641f11fc5da043f8ffb48a40666d84d
parent c5b1247bd1c3ab6722acfa95213be9a16bfb664c
author Dan Magenheimer <dan.magenheimer@oracle.com> 1327530771 -0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1328739252 -0800

zcache: fix deadlock condition

I discovered this deadlock condition awhile ago working on RAMster
but it affects zcache as well.  The list spinlock must be
locked prior to the page spinlock and released after.  As
a result, the page copy must also be done while the locks are held.

Applies to 3.2.  Konrad, please push (via GregKH?)...
this is definitely a bug fix so need not be pushed during
a -rc0 window.

Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>