linux-kernel - [PATCH mm-unstable v1 3/4] selftests/vm: cow: fix compile warning on 32bit

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Date:   Mon,  5 Dec 2022 20:37:15 +0100
From:   David Hildenbrand <david@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-mm@...ck.org, linux-kselftest@...r.kernel.org,
        David Hildenbrand <david@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Shuah Khan <shuah@...nel.org>,
        Yang Li <yang.lee@...ux.alibaba.com>
Subject: [PATCH mm-unstable v1 3/4] selftests/vm: cow: fix compile warning on 32bit

The compiler complains about the conversion of a pointer to an int of
different width.

Fixes: 6f1405efc61b ("selftests/vm: anon_cow: add R/O longterm tests via gup_test")
Signed-off-by: David Hildenbrand <david@...hat.com>
---
 tools/testing/selftests/vm/cow.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/vm/cow.c b/tools/testing/selftests/vm/cow.c
index 73e05b52c49e..26f6ea3079e2 100644
--- a/tools/testing/selftests/vm/cow.c
+++ b/tools/testing/selftests/vm/cow.c
@@ -650,7 +650,7 @@ static void do_test_ro_pin(char *mem, size_t size, enum ro_pin_test test,
 	}
 
 	/* Take a R/O pin. This should trigger unsharing. */
-	args.addr = (__u64)mem;
+	args.addr = (__u64)(uintptr_t)mem;
 	args.size = size;
 	args.flags = fast ? PIN_LONGTERM_TEST_FLAG_USE_FAST : 0;
 	ret = ioctl(gup_fd, PIN_LONGTERM_TEST_START, &args);
@@ -669,7 +669,7 @@ static void do_test_ro_pin(char *mem, size_t size, enum ro_pin_test test,
 	 * Read back the content via the pin to the temporary buffer and
 	 * test if we observed the modification.
 	 */
-	tmp_val = (__u64)tmp;
+	tmp_val = (__u64)(uintptr_t)tmp;
 	ret = ioctl(gup_fd, PIN_LONGTERM_TEST_READ, &tmp_val);
 	if (ret)
 		ksft_test_result_fail("PIN_LONGTERM_TEST_READ failed\n");
-- 
2.38.1