PM / Hibernate: Make snapshot_release() restore GFP mask
If the process using the hibernate user space interface closes /dev/snapshot after creating a hibernation image without thawing tasks, snapshot_release() should call pm_restore_gfp_mask() to restore the GFP mask used before the creation of the image. Make that happen. Tested-by: Alexandre Felipe Muller de Souza <alexandrefm@mandriva.com.br> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: stable@kernel.org
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