setup - setup devices and filesystems, mount root filesystem
setup() is called once from within linux/init/main.c. It calls
initialization functions for devices and filesystems configured into the
kernel and then mounts the root filesystem.
No user process may call setup(). Any user process, even a
process with superuser permission, will receive EPERM.
setup() always returns -1 for a user process.
Since Linux 2.1.121, no such function exists anymore.
This function is Linux-specific, and should not be used in programs intended to
be portable, or indeed in any programs at all.
The calling sequence varied: at some times setup() has had a single
argument void *BIOS and at other times a single argument int
This page is part of release 5.13 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the latest
version of this page, can be found at https://www.kernel.org/doc/man-pages/.
- Always, for a user process.