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Paul Mackerras a355aa54f1 KVM: Add barriers to allow mmu_notifier_retry to be used locklessly 
This adds an smp_wmb in kvm_mmu_notifier_invalidate_range_end() and an
smp_rmb in mmu_notifier_retry() so that mmu_notifier_retry() will give
the correct answer when called without kvm->mmu_lock being held.
PowerPC Book3S HV KVM wants to use a bitlock per guest page rather than
a single global spinlock in order to improve the scalability of updates
to the guest MMU hashed page table, and so needs this.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Acked-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
 		2012-03-05 14:52:38 +02:00
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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 epoll: introduce POLLFREE to flush ->signalfd_wqh before kfree() 2012-02-24 11:42:50 -08:00
crypto
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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 KVM: Add barriers to allow mmu_notifier_retry to be used locklessly 2012-03-05 14:52:38 +02:00
math-emu
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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
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mtd mtd: document that MEMWRITE ioctl is NAND-specific 2012-01-09 18:18:36 +00:00
net netfilter: ctnetlink: fix soft lockup when netlink adds new entries (v2) 2012-02-24 12:24:15 +01:00
pcmcia
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rdma rdma/core: Fix sparse warnings 2012-01-04 09:17:45 -08:00
rxrpc
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scsi [SCSI] libfc: Declare local functions static 2012-01-16 12:45:48 +04:00
sound Merge branch 'fix/asoc' into for-linus 2012-01-31 15:13:14 +01:00
target target: Change target_submit_cmd() to return void 2012-02-07 06:41:04 +00:00
trace sched/events: Revert trace_sched_stat_sleeptime() 2012-02-22 12:06:55 +01:00
video fbdev fixes for 3.3 2012-02-07 15:54:02 -08:00
xen Merge branch 'for-3.3/drivers' of git://git.kernel.dk/linux-block 2012-01-15 12:48:41 -08:00
Kbuild
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