Dynamic debug lacks the ability to enable debug messages at boot time.
One could patch initramfs or service startup scripts to write to
/sys/../dynamic_debug/control, but this sucks.

This patch makes it possible to pass a query in the same format one can
write to /sys/../dynamic_debug/control via boot param.
When dynamic debug gets initialized, this query will automatically be
applied.
Signed-off-by: NThomas Renninger <trenn@suse.de>
Acked-by: jbaron@redhat.com
Acked-by: NPekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>