This patch adds a debug_flag parameter that can be set on module load, and allows the DEBUG facility without a module recompile.
Note that now DEBUG 1 is the default with this patch.

Usage: modprobe st debug_flag=1
Signed-off-by: NLaurence Oberman <loberman@redhat.com>
Acked-by: NKai M??kisara <kai.makisara@kolumbus.fi>
Signed-off-by: NChristoph Hellwig <hch@lst.de>