linux-kernel - Re: [RFC PATCH] fs: remove uselib() system call

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Message-ID: <CAMuHMdWG5WRf2iP7UABCXMfdy67QHnwPbTEiqt47_7L3=T6jEQ@mail.gmail.com>
Date: Tue, 27 May 2025 15:54:44 +0200
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Christian Brauner <brauner@...nel.org>
Cc: linux-fsdevel@...r.kernel.org, 
	Linus Torvalds <torvalds@...ux-foundation.org>, Kees Cook <kees@...nel.org>, 
	linux-kernel@...r.kernel.org, linux-m68k <linux-m68k@...ts.linux-m68k.org>
Subject: Re: [RFC PATCH] fs: remove uselib() system call

Hi Christian,

On Tue, 15 Apr 2025 at 10:31, Christian Brauner <brauner@...nel.org> wrote:
> This system call has been deprecated for quite a while now.
> Let's try and remove it from the kernel completely.
>
> Signed-off-by: Christian Brauner <brauner@...nel.org>

Thanks for your patch, which is now commit 79beea2db0431536 ("fs:
remove uselib() system call") upstream.

> --- a/init/Kconfig
> +++ b/init/Kconfig
> @@ -479,16 +479,6 @@ config CROSS_MEMORY_ATTACH
>           to directly read from or write to another process' address space.
>           See the man page for more details.
>
> -config USELIB
> -       bool "uselib syscall (for libc5 and earlier)"
> -       default ALPHA || M68K || SPARC
> -       help
> -         This option enables the uselib syscall, a system call used in the
> -         dynamic linker from libc5 and earlier.  glibc does not use this
> -         system call.  If you intend to run programs built on libc5 or
> -         earlier, you may need to enable this syscall.  Current systems
> -         running glibc can safely disable this.
> -
>  config AUDIT
>         bool "Auditing support"
>         depends on NET

FTR, after this m68k machines can still boot the good old
filesys-ELF-2.0.x-1400K-2.gz ramdisk (containing libc5 and these new
kind of binaries called "ELF" ;-) from 1996 fine.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds