Enable crypto API fallback for blk-crypto

modulename: blk-crypto-fallback.ko

configname: CONFIG_BLK_INLINE_ENCRYPTION_FALLBACK

Linux Kernel Configuration
└─>Enable the block layer
└─>Enable crypto API fallback for blk-crypto
In linux kernel since version 5.1 (release Date: 2019-05-05)  
Enabling this lets the block layer handle inline encryption
by falling back to the kernel crypto API when inline
encryption hardware is not present.

source code: