user/sven/linux.git/Documentation/admin-guide/blockdev/ramdisk.rst, branch v5.4.60Linux Kernel
https://git.stealer.net/cgit.cgi/user/sven/linux.git/atom?h=v5.4.602019-07-15T14:03:01Zdocs: blockdev: add it to the admin-guide2019-07-15T14:03:01ZMauro Carvalho Chehabmchehab+samsung@kernel.org2019-06-18T14:47:10Zurn:sha1:e7751617dd0599ceadf4221cb08e04307b00aa1f
The blockdev book basically contains user-faced documentation.
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>