linux/tools/testing/cxl/cxl_port_test.c

// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2022 Intel Corporation. All rights reserved. */

#include "watermark.h"

cxl_test_watermark(cxl_port);
tools/testing/cxl: Prevent cxl_test from confusing production modules The cxl_test machinery builds modified versions of the modules in drivers/cxl/ and intercepts some of their calls to allow cxl_test to inject mock CXL topologies for test. However, if cxl_test attempts the same with production modules, fireworks ensue as Luis discovered [1]. Prevent that scenario by arranging for cxl_test to check for a "watermark" symbol in each of the modules it expects to be modified before the test can run. This turns undefined runtime behavior or crashes into a safer failure to load the cxl_test module. Link: http://lore.kernel.org/r/20221209062919.1096779-1-mcgrof@kernel.org [1] Reported-by: Luis Chamberlain <mcgrof@kernel.org> Signed-off-by: Dan Williams <dan.j.williams@intel.com> 2022-12-14 00:44:24 +08:00			`// SPDX-License-Identifier: GPL-2.0`
			`/* Copyright(c) 2022 Intel Corporation. All rights reserved. */`

			`#include "watermark.h"`

			`cxl_test_watermark(cxl_port);`