The VALUE_IF_KUNIT macro will add expression statement only if the CONFIG_KUNIT is enabled. Otherwise if CONFIG_KUNIT is not enabled it will evaluate always to 0.
Signed-off-by: Michal Wajdeczko <[email protected]> --- Cc: Rae Moar <[email protected]> Cc: David Gow <[email protected]> Cc: Lucas De Marchi <[email protected]> --- v2: add simple usage example (Rae) reformat kernel-doc for better output (Michal) s/ONLY_IF_KUNIT/VALUE_IF_KUNIT --- include/kunit/visibility.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/include/kunit/visibility.h b/include/kunit/visibility.h index c1825381adfc..b156cafa4705 100644 --- a/include/kunit/visibility.h +++ b/include/kunit/visibility.h @@ -30,6 +30,25 @@ */ #define DECLARE_IF_KUNIT(body...) body + /** + * VALUE_IF_KUNIT - Conditionally evaluate an expression + * @expr: the expression to be evaluated conditionally + * + * This macro evaluates expression statement only if CONFIG_KUNIT is enabled. + * Otherwise if CONFIG_KUNIT is not enabled it will evaluate always to 0. + * + * .. code-block:: C + * + * int real_func(int i) + * { + * if (VALUE_IF_KUNIT(i == 0xC0FFE)) + * return 0; + * + * return i + 1; + * } + */ + #define VALUE_IF_KUNIT(expr...) expr + /** * VISIBLE_IF_KUNIT - A macro that sets symbols to be static if * CONFIG_KUNIT is not enabled. Otherwise if CONFIG_KUNIT is enabled @@ -46,6 +65,7 @@ EXPORTED_FOR_KUNIT_TESTING) #else #define DECLARE_IF_KUNIT(body...) + #define VALUE_IF_KUNIT(expr...) 0 #define VISIBLE_IF_KUNIT static #define EXPORT_SYMBOL_IF_KUNIT(symbol) #endif -- 2.43.0
