[PATCH 0/5] Patches used to build mkroot.

From: Rob Landley <rob@landley.net>
To: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>,
	Andrew Halaney <ahalaney@redhat.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Borislav Petkov <bp@alien8.de>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Dominik Brodowski <linux@dominikbrodowski.net>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	"H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>,
	"Jason A. Donenfeld" <Jason@zx2c4.com>,
	linux-kbuild@vger.kernel.org, Li Zhe <lizhe.67@bytedance.com>,
	llvm@lists.linux.dev, Mark-PK Tsai <mark-pk.tsai@mediatek.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Masami Hiramatsu <mhiramat@kernel.org>,
	Nathan Chancellor <nathan@kernel.org>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Nicolas Schier <nicolas@fjasle.eu>,
	Peter Zijlstra <peterz@infradead.org>
Subject: [PATCH 0/5] Patches used to build mkroot.
Date: Tue, 21 Feb 2023 14:53:30 -0600	[thread overview]
Message-ID: <b455394f-9faa-1f1a-f171-0b9d5e9ada35@landley.net> (raw)

The ~300 line bash script in toybox that builds bootable Linux systems
for a dozen-ish targets can use a vanilla kernel, but the binaries I
ship are built from a kernel with these patches:

https://github.com/landley/toybox/blob/master/scripts/mkroot.sh
https://landley.net/toybox/downloads/binaries/mkroot/0.8.9/

I've posted each patch to the list already, but here they are together
and updated for 6.2:

1) let LLVM build normally without telling Linux on the command line
This way I can mix CROSS_COMPILE=$ARCH-unknown-linux-cross- without
having to care that some are llvm and some are gcc.

2) don't require an extra dependency to build x86-64 no other target needs.

3) Make CONFIG_DEVTMPFS_MOUNT work in initramfs. That way having
the kernel build archive up a directory into a cpio.gz as a normal
user doesn't leave me without a /dev/console and thus init running
with stdin/stderr/stdout closed.

4) Replace the only user of bc with c. (Another package dependency
with only one user.)

5) Fix rootfstype=tmpfs in initramfs. (A thinko I made in 2013 which
nobody else has bothered to fix for a decade now.)