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From: Wilson Felipe Pereira <wfelipe@google.com>
To: Andrew Morton <akpm@linux-foundation.org>, Arnd Bergmann <arnd@arndb.de>
Cc: "Maciej Żenczykowski" <maze@google.com>,
	"Paul Walmsley" <pjw@kernel.org>,
	"Palmer Dabbelt" <palmer@dabbelt.com>,
	"Albert Ou" <aou@eecs.berkeley.edu>,
	"Alexandre Ghiti" <alex@ghiti.fr>,
	"Heiko Carstens" <hca@linux.ibm.com>,
	"Vasily Gorbik" <gor@linux.ibm.com>,
	"Alexander Gordeev" <agordeev@linux.ibm.com>,
	"Christian Borntraeger" <borntraeger@linux.ibm.com>,
	"Sven Schnelle" <svens@linux.ibm.com>,
	linux-arch@vger.kernel.org, linux-riscv@lists.infradead.org,
	linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org,
	"Wilson Felipe Pereira" <wfelipe@google.com>
Subject: [PATCH v2 0/2] init, arch: make command line size and init arg limit configurable
Date: Tue, 18 Aug 2026 23:16:31 +0000	[thread overview]
Message-ID: <20260818231646.804507-1-wfelipe@google.com> (raw)

This patch series promotes COMMAND_LINE_SIZE from arch/s390/Kconfig to
init/Kconfig to be generally available to other architectures.

In some use cases, such as netboot kernels, rootfs configurations, larger
initramfs setups, require larger sizes. While for embedded workloads, it
can be reduced to save memory.

Since COMMAND_LINE_SIZE can be larger, it also makes sense to allow
INIT_ENV_ARG_LIMIT to be configured.

v1 -> v2
* Squash the Kconfig promotion and architecture header updates into a
  single atomic commit.
* Replace Originally-by with Signed-off-by for Maciej Żenczykowski.
* Add architectural range constraints for ARM, M68K, NIOS2, PowerPC,
  SuperH, and Alpha based on hardware, buffer, and stack limits.
* Fix Kconfig symbol for PowerPC from POWERPC to PPC.
* Split pre-existing init/main.c logic bug fixes into a separate series.

v1: https://lore.kernel.org/all/20260806061429.474992-1-wfelipe@google.com/

Wilson Felipe Pereira (2):
  init, arch: make CONFIG_COMMAND_LINE_SIZE globally configurable
  init/Kconfig: make config INIT_ENV_ARG_LIMIT user-configurable

 arch/alpha/include/uapi/asm/setup.h      |  4 ++++
 arch/arc/include/asm/setup.h             |  2 +-
 arch/arm/include/uapi/asm/setup.h        |  6 +++++-
 arch/arm64/include/uapi/asm/setup.h      |  4 ++++
 arch/loongarch/include/uapi/asm/setup.h  |  4 ++++
 arch/m68k/include/uapi/asm/setup.h       |  6 +++++-
 arch/microblaze/include/uapi/asm/setup.h |  4 ++++
 arch/mips/include/uapi/asm/setup.h       |  4 ++++
 arch/parisc/include/uapi/asm/setup.h     |  4 ++++
 arch/powerpc/include/uapi/asm/setup.h    |  4 ++++
 arch/riscv/include/uapi/asm/setup.h      |  4 ++++
 arch/s390/Kconfig                        |  8 --------
 arch/sparc/include/uapi/asm/setup.h      | 10 +++++++---
 arch/um/include/asm/setup.h              |  2 +-
 arch/x86/include/asm/setup.h             |  2 +-
 arch/xtensa/include/uapi/asm/setup.h     |  4 ++++
 include/uapi/asm-generic/setup.h         |  4 ++++
 init/Kconfig                             | 19 ++++++++++++++++++-
 18 files changed, 78 insertions(+), 17 deletions(-)

--
2.55.0.737.g08866a6d13-goog

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             reply	other threads:[~2026-08-18 23:17 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-18 23:16 Wilson Felipe Pereira [this message]
2026-08-18 23:16 ` [PATCH v2 1/2] init, arch: make CONFIG_COMMAND_LINE_SIZE globally configurable Wilson Felipe Pereira
2026-08-18 23:16 ` [PATCH v2 2/2] init/Kconfig: make config INIT_ENV_ARG_LIMIT user-configurable Wilson Felipe Pereira

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