Colin Cross 1ff562ebff freezer: add unsafe versions of freezable helpers for NFS ... NFS calls the freezable helpers with locks held, which is unsafe and will cause lockdep warnings when 6aa9707 "lockdep: check that no locks held at freeze time" is reapplied (it was reverted in dbf520a). NFS shouldn't be doing this, but it has long-running syscalls that must hold a lock but also shouldn't block suspend. Until NFS freeze handling is rewritten to use a signal to exit out of the critical section, add new *_unsafe versions of the helpers that will not run the lockdep test when 6aa9707 is reapplied, and call them from NFS. In practice the likley result of holding the lock while freezing is that a second task blocked on the lock will never freeze, aborting suspend, but it is possible to manufacture a case using the cgroup freezer, the lock, and the suspend freezer to create a deadlock. Silencing the lockdep warning here will allow problems to be found in other drivers that may have a more serious deadlock risk, and prevent new problems from being added. Change-Id: Ia17d32cdd013a6517bdd5759da900970a4427170 Signed-off-by: Colin Cross <ccross@android.com> Acked-by: Pavel Machek <pavel@ucw.cz> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>		2013-06-13 15:04:38 -07:00
..
acpi	Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux	2012-05-05 10:06:06 -07:00
asm-generic	signal: Define __ARCH_HAS_SA_RESTORER so we know whether to clear sa_restorer	2013-04-05 10:04:14 -07:00
crypto	crypto: user - Fix lookup of algorithms with IV generator	2012-03-29 19:52:47 +08:00
drm	drm/radeon: add Richland pci ids	2013-03-28 12:12:13 -07:00
keys
linux	freezer: add unsafe versions of freezable helpers for NFS	2013-06-13 15:04:38 -07:00
math-emu
media	Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media	2012-05-14 11:23:37 -07:00
misc
mtd
net	This is the 3.4.39 stable release	2013-04-05 20:54:49 -07:00
pcmcia
rdma	infiniband: pass rdma_cm module to netlink_dump_start	2012-10-28 10:14:15 -07:00
rxrpc
scsi	SCSI: libsas: fix taskfile corruption in sas_ata_qc_fill_rtf	2012-07-16 09:04:37 -07:00
sound	This is the 3.4.35 stable release	2013-03-11 17:34:33 -07:00
target	target: Add link_magic for fabric allow_link destination target_items	2013-01-21 11:45:24 -08:00
trace	mmc: Add tracepoints of mmc block operations	2013-05-17 16:05:36 -07:00
video	atmel_lcdfb: fix 16-bpp modes on older SOCs	2013-03-20 13:05:00 -07:00
xen	xen/blkback: correctly respond to unknown, non-native requests	2013-04-05 10:04:18 -07:00
Kbuild