KVM: Fix gfn_to_page() acquiring mmap_sem twice

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KVM's nopage handler calls gfn_to_page() which acquires the mmap_sem when
calling out to get_user_pages().  nopage handlers are already invoked with the
mmap_sem held though.  Introduce a __gfn_to_page() for use by the nopage
handler which requires the lock to already be held.

This was noticed by tglx.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

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Anthony Liguori 2007-10-29 15:15:20 -05:00 • committed by Avi Kivity

parent f78e0e2ee4

commit aab61cc0d2

1 changed files with 18 additions and 4 deletions

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22

drivers/kvm/kvm_main.c

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