Add upper table fds to kernel.proc filetable

src/scheme/proc.rs

@@ -336,11 +336,8 @@ impl ProcScheme {
                     use core::fmt::Write;
 
                     let mut data = String::new();
-                    // Only the posix file table is targeted.
                     for index in filetable
                         .read()
-                        .posix_fdtbl
-                        .iter()
                         .enumerate()
                         .filter_map(|(idx, val)| val.as_ref().map(|_| idx))
                     {