linux-kernel - [PATCH 0/5] sysctl: Remove last two ctl_tables from the kern

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Message-Id: <20250627-jag-sysctl-v1-0-20dd9801420b@kernel.org>
Date: Fri, 27 Jun 2025 11:27:24 +0200
From: Joel Granados <joel.granados@...nel.org>
To: Kees Cook <kees@...nel.org>, Shuah Khan <shuah@...nel.org>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 "Rafael J. Wysocki" <rafael@...nel.org>, Danilo Krummrich <dakr@...nel.org>, 
 Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org, 
 linux-kselftest@...r.kernel.org, Joel Granados <joel.granados@...nel.org>
Subject: [PATCH 0/5] sysctl: Remove last two ctl_tables from the kern_table
 array

This is the last series to relocate sysctl tables from kernel/sysctl.c
into their respective subsystems. After the move of two ctl_tables
(uevent_helper & overflow{uid,gid}), five remain. They either handle
variables defined within sysctl.c or serve as a common place for
variables that are defined in different architectures. These five will
not be moved. Note that this series includes two auxiliary changes:
Removal of an unused variable and Nix-based rework of sysctl.sh test
script

By decentralizing sysctl registrations, subsystem maintainers regain
control over their sysctl interfaces, improving maintainability and
reducing the likelihood of merge conflicts. All this is made possible by
the work done to reduce the ctl_table memory footprint in commit
d7a76ec87195 ("sysctl: Remove check for sentinel element in ctl_table
arrays").

A few comments on the process:
1. If you prefer to merge this through a non-sysctl tree, please let me
   know so I can avoid conflicts in linux-next.
2. Apologies if you were copied by mistake—let me know if you'd like to
   be removed.
3. This series builds on [1], so please rebase accordingly for clean
   application.
4. Testing done by running sysctl selftests on x86_64 and 0-day.

Comments/Suggestions greatly appreciated

[1] https://lore.kernel.org/20250509-jag-mv_ctltables_iter2-v1-0-d0ad83f5f4c3@kernel.org

Signed-off-by: Joel Granados <joel.granados@...nel.org>
---
Joel Granados (5):
      sysctl: Nixify sysctl.sh
      sysctl: Removed unused variable
      uevent: mv uevent_helper into kobject_uevent.c
      kernel/sys.c: Move overflow{uid,gid} sysctl into kernel/sys.c
      sysctl: rename kern_table -> sysctl_subsys_table

 include/linux/sysctl.h                   |  1 -
 kernel/sys.c                             | 29 +++++++++++++++++++
 kernel/sysctl.c                          | 49 +++++++-------------------------
 lib/kobject_uevent.c                     | 20 +++++++++++++
 tools/testing/selftests/sysctl/sysctl.sh |  2 +-
 5 files changed, 61 insertions(+), 40 deletions(-)
---
base-commit: 501dd0fbc76bcae57902ea000d9c6ccd9d5f226e
change-id: 20250627-jag-sysctl-823adf5732be

Best regards,
-- 
Joel Granados <joel.granados@...nel.org>