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kunit: add macro to allow conditionally exposing static symbols to tests 

Create two macros:

VISIBLE_IF_KUNIT - A macro that sets symbols to be static if CONFIG_KUNIT
is not enabled. Otherwise if CONFIG_KUNIT is enabled there is no change to
the symbol definition.

EXPORT_SYMBOL_IF_KUNIT(symbol) - Exports symbol into
EXPORTED_FOR_KUNIT_TESTING namespace only if CONFIG_KUNIT is enabled. Must
use MODULE_IMPORT_NS(EXPORTED_FOR_KUNIT_TESTING) in test file in order to
use symbols.

Signed-off-by: Rae Moar <rmoar@google.com>
Reviewed-by: John Johansen <john.johansen@canonical.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
Rae Moar 2022-12-07 01:40:23 +00:00 committed by Shuah Khan
parent c2bb92bc4e
commit 9c988fae6f
1 changed files with 33 additions and 0 deletions
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33
include/kunit/visibility.h Normal file
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/* SPDX-License-Identifier: GPL-2.0 */
/*
* KUnit API to allow symbols to be conditionally visible during KUnit
* testing
*
* Copyright (C) 2022, Google LLC.
* Author: Rae Moar <rmoar@google.com>
*/
#ifndef _KUNIT_VISIBILITY_H
#define _KUNIT_VISIBILITY_H
#if IS_ENABLED(CONFIG_KUNIT)
/**
* VISIBLE_IF_KUNIT - A macro that sets symbols to be static if
* CONFIG_KUNIT is not enabled. Otherwise if CONFIG_KUNIT is enabled
* there is no change to the symbol definition.
*/
#define VISIBLE_IF_KUNIT
/**
* EXPORT_SYMBOL_IF_KUNIT(symbol) - Exports symbol into
* EXPORTED_FOR_KUNIT_TESTING namespace only if CONFIG_KUNIT is
* enabled. Must use MODULE_IMPORT_NS(EXPORTED_FOR_KUNIT_TESTING)
* in test file in order to use symbols.
*/
#define EXPORT_SYMBOL_IF_KUNIT(symbol) EXPORT_SYMBOL_NS(symbol, \
EXPORTED_FOR_KUNIT_TESTING)
#else
#define VISIBLE_IF_KUNIT static
#define EXPORT_SYMBOL_IF_KUNIT(symbol)
#endif
#endif /* _KUNIT_VISIBILITY_H */