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From:   Luis Chamberlain <mcgrof@kernel.org>
To:     alison.schofield@intel.com, vishal.l.verma@intel.com,
        ira.weiny@intel.com, bwidawsk@kernel.org, dan.j.williams@intel.com
Cc:     dave@stgolabs.net, a.manzanares@samsung.com, mcgrof@kernel.org,
        linux-cxl@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] cxl_test: require 64-bit
Date:   Mon, 19 Dec 2022 11:50:50 -0800
Message-Id: <20221219195050.325959-1-mcgrof@kernel.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: Luis Chamberlain <mcgrof@infradead.org>
Precedence: bulk

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>
---
 tools/testing/cxl/config_check.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/testing/cxl/config_check.c b/tools/testing/cxl/config_check.c
index c4c457e59841..99b56b5f6edf 100644
--- 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));
-- 
2.35.1