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authorBoris Ostrovsky <boris.ostrovsky@oracle.com>2013-09-09 10:44:26 +0000
committerStefano Stabellini <stefano.stabellini@eu.citrix.com>2013-09-09 10:50:52 +0000
commitd7f8f48d1eb3186b1b80b2ed9a7adab191f753e9 (patch)
tree712a6bf69b28b03a0defce46f7289d4cfba94eb0 /arch/arm/xen
parent9dd4b2944c46e1fdbd0a516c221c8a2670cbf005 (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')
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