mm/gup: fix FOLLFORCE COW security issue and remove FOLLCOW
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.19.6 by commit 9def52eb10baab3b700858003d462fcf17d62873, it was introduced in version v5.16 by commit 9ae0f87d009ca6c4aab2882641ddfc319727e3db. For more details please see the references link.