[PATCH v5 0/4] slab: Introduce kmalloc_obj() and family

[Kees Cook <kees@kernel.org>]

Hi,

Here's a refresh and update on the kmalloc_obj() API proposal for
discussion here and at LPC[1]. Please see patch 2 for the bulk of the
details. And note that this is obviously not v6.19 material! :)

The tree-wide patch for conversions is here:
https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git/commit/?h=dev/v6.18-rc6/alloc_obj/v5&id=f79ee96ad6a3cafdb274fe15d3ae067724e72327

Thanks!

-Kees

[1] https://lpc.events/event/19/contributions/2136/

 v5:
  - switch to using assignment with type as first argument (Linus)
  - fix various comment, commit log, and kern-docs (Randy, Miguel)
  - renamed flex_counter internal helpers with "__" prefix (Przemek)
 v4: https://lore.kernel.org/lkml/20250315025852.it.568-kees@kernel.org/
 v3: https://lore.kernel.org/lkml/20240822231324.make.666-kees@kernel.org/
 v2: https://lore.kernel.org/lkml/20240807235433.work.317-kees@kernel.org/
 v1: https://lore.kernel.org/lkml/20240719192744.work.264-kees@kernel.org/

Kees Cook (4):
  compiler_types: Introduce __flex_counter() and family
  slab: Introduce kmalloc_obj() and family
  checkpatch: Suggest kmalloc_obj family for sizeof allocations
  coccinelle: Add kmalloc_objs conversion script

 scripts/checkpatch.pl                     |  39 ++++-
 scripts/coccinelle/api/kmalloc_objs.cocci | 168 +++++++++++++++++++++
 Documentation/process/deprecated.rst      |  42 ++++++
 include/linux/compiler_types.h            |  31 ++++
 include/linux/overflow.h                  |  40 +++++
 include/linux/slab.h                      | 172 ++++++++++++++++++++++
 6 files changed, 486 insertions(+), 6 deletions(-)
 create mode 100644 scripts/coccinelle/api/kmalloc_objs.cocci

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2.34.1