Verity data device root hash signature verification with secondary keyring

configname: CONFIG_DM_VERITY_VERIFY_ROOTHASH_SIG_SECONDARY_KEYRING

Linux Kernel Configuration
└─>Device Drivers
└─>Multiple devices driver support (RAID and LVM)
└─>Verity data device root hash signature verification with secondary keyring
In linux kernel since version 5.2 (release Date: 2019-07-07)  
Rely on the secondary trusted keyring to verify dm-verity signatures.

If unsure, say N.