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Avoid NULL pointer usage if workqueue creation failed. Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Cc: Pete Zaitcev <zaitcev@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>