Userspace snapshot device

modulename: user.ko

configname: CONFIG_HIBERNATION_SNAPSHOT_DEV

Linux Kernel Configuration
└─>Power management and ACPI options
└─>Userspace snapshot device
In linux kernel since version 5.1 (release Date: 2019-05-05)  
Device used by the uswsusp tools.

Say N if no snapshotting from userspace is needed, this also
reduces the attack surface of the kernel.

If in doubt, say Y.

source code: