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authorAvi Kivity <avi@redhat.com>2009-06-04 19:09:08 +0400
committerAvi Kivity <avi@redhat.com>2009-09-10 09:32:47 +0400
commit105f8d40a737564100dc7dcd1d94d4e15fada20e (patch)
treecf94ec090c8a8677acfd312cbdf262f0321363eb /fs/btrfs
parent596ae895653fe336b9b5815ad2c175d22bb26f21 (diff)
downloadlinux-105f8d40a737564100dc7dcd1d94d4e15fada20e.tar.xz
KVM: Calculate available entries in coalesced mmio ring
Instead of checking whether we'll wrap around, calculate how many entries are available, and check whether we have enough (just one) for the pending mmio. By itself, this doesn't change anything, but it paves the way for making this function lockless. Signed-off-by: Avi Kivity <avi@redhat.com>
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