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list: add kunit test for private list primitives

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Add a KUnit test suite for the new private list primitives.

The test defines a struct with a __private list_head and exercises every
macro defined in <linux/list_private.h>.

This ensures that the macros correctly handle the ACCESS_PRIVATE()
abstraction and compile without warnings when acting on private members,
verifying that qualifiers are stripped and offsets are calculated
correctly.

Link: https://lkml.kernel.org/r/20251218155752.3045808-3-pasha.tatashin@soleen.com
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Reviewed-by: David Gow <davidgow@google.com>
Cc: Alexander Graf <graf@amazon.com>
Cc: David Matlack <dmatlack@google.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kees Cook <kees@kernel.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Pratyush Yadav <pratyush@kernel.org>
Cc: Samiullah Khawaja <skhawaja@google.com>
Cc: Tamir Duberstein <tamird@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Pasha Tatashin
2025-12-18 10:57:49 -05:00
committed by Andrew Morton
parent 989b3c5af6
commit 66bd8501ce
3 changed files with 91 additions and 0 deletions
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14
lib/Kconfig.debug
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@@ -2786,6 +2786,20 @@ config LIST_KUNIT_TEST
If unsure, say N.
config LIST_PRIVATE_KUNIT_TEST
tristate "KUnit Test for Kernel Private Linked-list structures" if !KUNIT_ALL_TESTS
depends on KUNIT
default KUNIT_ALL_TESTS
help
This builds the KUnit test for the private linked-list primitives
defined in include/linux/list_private.h.
These primitives allow manipulation of list_head members that are
marked as private and require special accessors (ACCESS_PRIVATE)
to strip qualifiers or handle encapsulation.
If unsure, say N.
config HASHTABLE_KUNIT_TEST
tristate "KUnit Test for Kernel Hashtable structures" if !KUNIT_ALL_TESTS
depends on KUNIT