From: Seth Jennings <sjenning@linux.vnet.ibm.com>
Date: Mon, 22 Aug 2011 19:30:38 +0000 (-0500)
Subject: staging: zcache: fix possible sleep under lock
X-Git-Tag: v3.2-rc1~169^2^2~864^2~171
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dbe82eb1170c0095e0ce89676235e0b27d7040d1;p=pandora-kernel.git

staging: zcache: fix possible sleep under lock

zcache_new_pool() calls kmalloc() with GFP_KERNEL which has
__GFP_WAIT set.  However, zcache_new_pool() gets called on
a stack that holds the swap_lock spinlock, leading to a
possible sleep-with-lock situation. The lock is obtained
in enable_swap_info().

The patch replaces GFP_KERNEL with GFP_ATOMIC.

v2: replace with GFP_ATOMIC, not GFP_IOFS

Signed-off-by: Seth Jennings <sjenning@linux.vnet.ibm.com>
Acked-by: Dan Magenheimer <dan.magenheimer@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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