pf_migration_mutex
lockdep_assert_held(pf_migration_mutex(xe, vfid));
lockdep_assert_held(pf_migration_mutex(xe, vfid));
lockdep_assert_held(pf_migration_mutex(xe, vfid));
scoped_cond_guard(mutex_intr, return -EINTR, pf_migration_mutex(xe, vfid)) {