This is a note to let you know that I've just added the patch titled
list: test: Add a test for list_is_head()
to the 5.17-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
list-test-add-a-test-for-list_is_head.patch
and it can be found in the queue-5.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 37dc573c0a547e1aed0c9abb480fab797bd3833f Mon Sep 17 00:00:00 2001
From: David Gow <davidgow@xxxxxxxxxx>
Date: Fri, 25 Feb 2022 10:52:48 +0800
Subject: list: test: Add a test for list_is_head()
From: David Gow <davidgow@xxxxxxxxxx>
commit 37dc573c0a547e1aed0c9abb480fab797bd3833f upstream.
list_is_head() was added recently[1], and didn't have a KUnit test. The
implementation is trivial, so it's not a particularly exciting test, but
it'd be nice to get back to full coverage of the list functions.
[1]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/include/linux/list.h?id=0425473037db40d9e322631f2d4dc6ef51f97e88
Signed-off-by: David Gow <davidgow@xxxxxxxxxx>
Acked-by: Daniel Latypov <dlatypov@xxxxxxxxxx>
Acked-by: Brendan Higgins <brendanhiggins@xxxxxxxxxx>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Signed-off-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
lib/list-test.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
--- a/lib/list-test.c
+++ b/lib/list-test.c
@@ -234,6 +234,24 @@ static void list_test_list_bulk_move_tai
KUNIT_EXPECT_EQ(test, i, 2);
}
+static void list_test_list_is_head(struct kunit *test)
+{
+ struct list_head a, b, c;
+
+ /* Two lists: [a] -> b, [c] */
+ INIT_LIST_HEAD(&a);
+ INIT_LIST_HEAD(&c);
+ list_add_tail(&b, &a);
+
+ KUNIT_EXPECT_TRUE_MSG(test, list_is_head(&a, &a),
+ "Head element of same list");
+ KUNIT_EXPECT_FALSE_MSG(test, list_is_head(&a, &b),
+ "Non-head element of same list");
+ KUNIT_EXPECT_FALSE_MSG(test, list_is_head(&a, &c),
+ "Head element of different list");
+}
+
+
static void list_test_list_is_first(struct kunit *test)
{
struct list_head a, b;
@@ -710,6 +728,7 @@ static struct kunit_case list_test_cases
KUNIT_CASE(list_test_list_move),
KUNIT_CASE(list_test_list_move_tail),
KUNIT_CASE(list_test_list_bulk_move_tail),
+ KUNIT_CASE(list_test_list_is_head),
KUNIT_CASE(list_test_list_is_first),
KUNIT_CASE(list_test_list_is_last),
KUNIT_CASE(list_test_list_empty),
Patches currently in stable-queue which might be from davidgow@xxxxxxxxxx are
queue-5.17/kunit-tool-make-parser-stop-overwriting-status-of-su.patch
queue-5.17/list-test-add-a-test-for-list_is_head.patch
