Oleg Nesterov 6a1bdc1b57 sched: _cpu_down(): Don't play with current->cpus_allowed ... _cpu_down() changes the current task's affinity and then recovers it at the end. The problems are well known: we can't restore old_allowed if it was bound to the now-dead-cpu, and we can race with the userspace which can change cpu-affinity during unplug. _cpu_down() should not play with current->cpus_allowed at all. Instead, take_cpu_down() can migrate the caller of _cpu_down() after __cpu_disable() removes the dying cpu from cpu_online_mask. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <20100315091023.GA9148@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>		2010-04-02 20:12:03 +02:00
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acpi	acpi: Support IBM SMBus CMI devices	2010-03-24 14:38:37 +01:00
asm-generic	dma-mapping: pci: move pci_set_dma_mask and pci_set_consistent_dma_mask to pci-dma-compat.h	2010-03-12 15:52:42 -08:00
crypto
drm	Merge branch 'radeon-for-airlied' of ../linux-2.6 into drm-linus	2010-03-15 11:08:59 +10:00
keys
linux	sched: _cpu_down(): Don't play with current->cpus_allowed	2010-04-02 20:12:03 +02:00
math-emu
media	Merge branch 'for-next' into for-linus	2010-03-08 16:55:37 +01:00
mtd
net	Bluetooth: Convert debug files to actually use debugfs instead of sysfs	2010-03-21 05:49:35 +01:00
pcmcia	pcmcia: use dev_pm_ops for class pcmcia_socket_class	2010-03-24 11:00:11 +01:00
rdma	Merge branch 'misc' into for-next	2010-03-01 23:52:31 -08:00
rxrpc
scsi	Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2010-03-18 16:54:31 -07:00
sound	Merge branch 'topic/misc' into for-linus	2010-03-08 09:35:50 +01:00
trace	Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-03-18 16:52:46 -07:00
video	broadsheetfb: support storing waveform	2010-03-12 15:52:34 -08:00
xen
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