fs/pidfs.c:175:32: warning: symbol 'pidfs_dentry_operations' was not declared. Should it be static? In the following kernel version: name: linux-next url:https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git branch: next-20240221 commit: 4893c639cc3659cefaa675bf1e59f4e7571afb5c