perf: Fix data race between pin_count increment/decrement
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 v4.9.273 by commit 0c78dc6cbd99cad6445e1981211efc9bbbd56596, it was introduced in version v2.6.39 by commit fe4b04fa31a6dcf4358aa84cf81e5a7fd079469b. For more details please see the references link.