Rafael J. Wysocki 181e9bdef3 PM / Hibernate: Fix s2disk regression related to freezing workqueues ... Commit 2aede851dd PM / Hibernate: Freeze kernel threads after preallocating memory introduced a mechanism by which kernel threads were frozen after the preallocation of hibernate image memory to avoid problems with frozen kernel threads not responding to memory freeing requests. However, it overlooked the s2disk code path in which the SNAPSHOT_CREATE_IMAGE ioctl was run directly after SNAPSHOT_FREE, which caused freeze_workqueues_begin() to BUG(), because it saw that worqueues had been already frozen. Although in principle this issue might be addressed by removing the relevant BUG_ON() from freeze_workqueues_begin(), that would reintroduce the very problem that commit 2aede851dd attempted to avoid into that particular code path. For this reason, to fix the issue at hand, introduce thaw_kernel_threads() and make the SNAPSHOT_FREE ioctl execute it. Special thanks to Srivatsa S. Bhat for detailed analysis of the problem. Reported-and-tested-by: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Cc: stable@kernel.org		2012-01-29 20:35:52 +01:00
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acpi	Merge branches 'atomicio-apei', 'hotplug', 'sony-nvs-nosave' and 'thermal-netlink' into release	2012-01-23 19:47:06 -05:00
asm-generic
crypto
drm	drm: Fix authentication kernel crash	2012-01-25 09:27:45 +00:00
keys	keys: add a "logon" key type	2012-01-17 22:39:40 -06:00
linux	PM / Hibernate: Fix s2disk regression related to freezing workqueues	2012-01-29 20:35:52 +01:00
math-emu
media	Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media	2012-01-18 12:53:54 -08:00
misc
mtd
net	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2012-01-24 15:51:40 -08:00
pcmcia
rdma
rxrpc
scsi	[SCSI] libfc: Declare local functions static	2012-01-16 12:45:48 +04:00
sound
target
trace	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs	2012-01-17 15:49:54 -08:00
video
xen	Merge branch 'for-3.3/drivers' of git://git.kernel.dk/linux-block	2012-01-15 12:48:41 -08:00
Kbuild