[PATCH v2 0/3] sysctl: move sysctl type to ctl_table_header

["Thomas Weißschuh" <linux@weissschuh.net>]

Praparation series to enable constification of struct ctl_table further
down the line.
No functional changes are intended.

These changes have been split out and reworked from my original
const sysctl patchset [0].
I'm resubmitting the patchset in smaller chunks for easier review.
Each split-out series is meant to be useful on its own.

Changes since the original series:
* Explicit initializartion of header->type in init_header()
* Some additional cleanups

[0] https://lore.kernel.org/lkml/20231204-const-sysctl-v2-0-7a5060b11447@weissschuh.net/

---
Changes in v2:
- Rebase onto next-20240322 without changes
- Squash patch 4 into patch 3 (Joel)
- Rework commit messages as per Joels requests
- Link to v1: https://lore.kernel.org/r/20240222-sysctl-empty-dir-v1-0-45ba9a6352e8@weissschuh.net

---
Thomas Weißschuh (3):
      sysctl: drop sysctl_is_perm_empty_ctl_table
      sysctl: move sysctl type to ctl_table_header
      sysctl: drop now unnecessary out-of-bounds check

 fs/proc/proc_sysctl.c  | 19 ++++++++-----------
 include/linux/sysctl.h | 22 +++++++++++-----------
 2 files changed, 19 insertions(+), 22 deletions(-)
---
base-commit: 13ee4a7161b6fd938aef6688ff43b163f6d83e37
change-id: 20231216-sysctl-empty-dir-71d7631f7bfe

Best regards,
-- 
Thomas Weißschuh <linux@weissschuh.net>