Linux kernel stable tree (mirror) https://git.radix-linux.su/kernel/linux.git/atom?h=v7.0-rc2 2023-01-05T23:01:45+00:00 2023-01-05T23:01:45+00:00 Dan Williams dan.j.williams@intel.com 2022-12-13T16:44:24+00:00 urn:sha1:8c149eb011be23679b3320d3939f4e3c8271969c 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>