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| author | Boris Ostrovsky <boris.ostrovsky@oracle.com> | 2013-09-09 10:44:26 +0000 |
|---|---|---|
| committer | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2013-09-09 10:50:52 +0000 |
| commit | d7f8f48d1eb3186b1b80b2ed9a7adab191f753e9 (patch) | |
| tree | 712a6bf69b28b03a0defce46f7289d4cfba94eb0 /arch/arm/xen | |
| parent | 9dd4b2944c46e1fdbd0a516c221c8a2670cbf005 (diff) | |
xen/p2m: Don't call get_balloon_scratch_page() twice, keep interrupts disabled for multicalls
m2p_remove_override() calls get_balloon_scratch_page() in
MULTI_update_va_mapping() even though it already has pointer to this page from
the earlier call (in scratch_page). This second call doesn't have a matching
put_balloon_scratch_page() thus not restoring preempt count back. (Also, there
is no put_balloon_scratch_page() in the error path.)
In addition, the second multicall uses __xen_mc_entry() which does not disable
interrupts. Rearrange xen_mc_* calls to keep interrupts off while performing
multicalls.
This commit fixes a regression introduced by:
commit ee0726407feaf504dff304fb603652fb2d778b42
Author: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Date: Tue Jul 23 17:23:54 2013 +0000
xen/m2p: use GNTTABOP_unmap_and_replace to reinstate the original mapping
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Diffstat (limited to 'arch/arm/xen')
0 files changed, 0 insertions, 0 deletions