Disable watchdog shutdown on close

configname: CONFIG_WATCHDOG_NOWAYOUT

Linux Kernel Configuration
└─>Device Drivers
└─>Watchdog Timer Support
└─>Disable watchdog shutdown on close
In linux kernel since version 2.6.12  
The default watchdog behaviour (which you get if you say N here) is
to stop the timer if the process managing it closes the file
/dev/watchdog. It's always remotely possible that this process might
get killed. If you say Y here, the watchdog cannot be stopped once
it has been started.

depends
CONFIG_WATCHDOG