explain_munmap_or_die(3) on Linux
The text 475be1d1f6fe, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch) shipped it. The page shows this text now.
unmap a file or device from memory and report errors