initskripts: smt: hide error on cpu's that not support smt at all

Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>

config/rootfiles/core/135/filelists/files

@@ -9,6 +9,7 @@ etc/rc.d/init.d/functions
 etc/rc.d/init.d/leds
 etc/rc.d/init.d/networking/red.down/05-remove-dns-forwarders
 etc/rc.d/init.d/partresize
+etc/rc.d/init.d/smt
 etc/rc.d/init.d/sysctl
 etc/rc.d/init.d/unbound
 etc/sysctl.conf

src/initscripts/system/smt

@@ -18,7 +18,7 @@ case "${1}" in
 		# Nothing to do when SMT is not enabled or not supported anyways
 		if [ "$(</sys/devices/system/cpu/smt/control)" != "on" ]; then
 			exit 0
-		fi
+		fi 2>/dev/null
 
 		# Disable SMT when the processor is vulnerable to Foreshadow or Fallout/ZombieLoad/RIDL
 		for vuln in l1tf mds; do