NFSv4: Don't hold the layoutget locks across multiple RPC calls
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 v5.4.198 by commit a2b3be930e79cc5d9d829f158e31172b2043f0cd. For more details please see the references link.