tracing: Restructure traceclockglobal() to never block
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 v5.4.118 by commit c64da3294a7d59a4bf6874c664c13be892f15f44, it was introduced in version v5.4.76 by commit aef59b5e5bdfc800f0e7aec7e74a33e98bf142c0. For more details please see the references link.