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authorDavid Vrabel <david.vrabel@citrix.com>2013-09-11 17:45:44 +0000
committerStefano Stabellini <stefano.stabellini@eu.citrix.com>2013-09-11 17:52:58 +0000
commit2bad07ce28a0f61c1e776f99aa05f85e4e689e24 (patch)
treeb13abf74f1f22eaf3d71e5c399c599f72fd77c82 /drivers/scsi/gdth_proc.c
parentc3b7cb1fd8c1513be99fb3cfb7f39c5116d80dac (diff)
downloadlinux-2bad07ce28a0f61c1e776f99aa05f85e4e689e24.tar.bz2
xen/balloon: ensure preemption is disabled when using a scratch page
In decrease_reservation(), if the kernel is preempted between updating the mapping and updating the p2m then they may end up using different scratch pages. Use get_balloon_scratch_page() and put_balloon_scratch_page() which use get_cpu_var() and put_cpu_var() to correctly disable preemption. Signed-off-by: David Vrabel <david.vrabel@citrix.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Tested-by: Sander Eikelenboom <linux@eikelenboom.it>
Diffstat (limited to 'drivers/scsi/gdth_proc.c')
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