[PATCH 1/2] Documentation: kunit: Test Kconfig entries shouldn't select other configs

[David Gow]

Add a note to the Kconfig section of style.rst to use 'depends on' rather
than 'selects' for dependencies, as this can cause users of
CONFIG_KUNIT_ALL_TESTS to suddenly grow unexpected dependencies.

Signed-off-by: David Gow <david@xxxxxxxxxxxx>
---
 Documentation/dev-tools/kunit/style.rst | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/Documentation/dev-tools/kunit/style.rst b/Documentation/dev-tools/kunit/style.rst
index eac81a714a29..449f9f816fc7 100644
--- a/Documentation/dev-tools/kunit/style.rst
+++ b/Documentation/dev-tools/kunit/style.rst
@@ -164,9 +164,10 @@ This Kconfig entry must:
 * be visible only if ``CONFIG_KUNIT_ALL_TESTS`` is not enabled.
 * have a default value of ``CONFIG_KUNIT_ALL_TESTS``.
 * have a brief description of KUnit in the help text.
-
-If we are not able to meet above conditions (for example, the test is unable to
-be built as a module), Kconfig entries for tests should be tristate.
+* depend on the feature being tested, rather than selecting it (so that
+  enabling ``CONFIG_KUNIT_ALL_TESTS`` does not enable unrelated functionality).
+* be ``tristate``, unless there is a specific reason that the test cannot be
+  built as a module.
 
 For example, a Kconfig entry might look like:
 
-- 
2.54.0