tools/testing/cxl: require 64-bit

size_t is limited to 32-bits and so the gen_pool_alloc() using
the size of SZ_64G would map to 0, triggering a low allocation
which is not expected. Force the dependency on 64-bit for cxl_test
as that is what it was designed for.

This issue was found by build test reports when converting this
driver as a proper upstream driver.

Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Link: https://lore.kernel.org/r/20221219195050.325959-1-mcgrof@kernel.org
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/tools/testing/cxl/config_check.c b/tools/testing/cxl/config_check.c
index c4c457e59841b0ea93bcef07432ac01be4fbd89a..99b56b5f6edf828cb51943be2d2bccf548d0e80a 100644 (file)
--- a/tools/testing/cxl/config_check.c
+++ b/tools/testing/cxl/config_check.c
@@ -7,6 +7,7 @@ void check(void)
         * These kconfig symbols must be set to "m" for cxl_test to load
         * and operate.
         */
+       BUILD_BUG_ON(!IS_ENABLED(CONFIG_64BIT));
        BUILD_BUG_ON(!IS_MODULE(CONFIG_CXL_BUS));
        BUILD_BUG_ON(!IS_MODULE(CONFIG_CXL_ACPI));
        BUILD_BUG_ON(!IS_MODULE(CONFIG_CXL_PMEM));