use sync during boot wherever needed

board/common/overlay/etc/init.d/S00datapart

@@ -35,6 +35,7 @@ case "$1" in
         cp /etc/version /data/etc/version
         ln -s /usr/share/zoneinfo/UTC /data/etc/localtime
         touch /data/etc/adjtime
+        sync
         msg_done
 
         # mount other partitions depending on data

board/common/overlay/etc/init.d/S21passwd

@@ -26,7 +26,8 @@ case "$1" in
         
         sed -r -i 's/root:([^:]+):[[:digit:]]+:/root:\1::/' /data/etc/shadow # removes pwd expiration
         sed -r -i 's/admin:([^:]+):[[:digit:]]+:/admin:\1::/' /data/etc/shadow # removes pwd expiration
-        
+        sync
+
         msg_done
         ;;
 

board/common/overlay/etc/init.d/S60sshd

@@ -18,6 +18,7 @@ start() {
     umask 077
     hostname=$(hostname)
     echo "Welcome to $hostname!" > /var/cache/sshd_banner
+    sync
 
     /usr/sbin/sshd -f $conf
     test $? == 0 && msg_done || msg_fail

board/common/overlay/etc/init.d/S85motioneye

@@ -108,6 +108,8 @@ start() {
             curl -s -m 60 --data "$body" "http://127.0.0.1:$port$loc&_signature=$signature" > /dev/null
             index=$(($index + 1))
         done
+        
+        sync
     fi
 
     if [ -z "$meyewatch_disable" ]; then

board/common/overlay/etc/modprobe.d/modprobe.conf

@@ -4,3 +4,6 @@ options mwifiex disconnect_on_suspend=0
 options rndis_wlan power_save=0
 options b43 hwpctl=0
 options ath6kl_core suspend_mode=1
+
+options stk1160 keep_buffers=1
+