[PATCH 2/2] selftests/empty_mntns: use unused bit in unknown_flags_rejected test

[Disha Goel]

The unknown_flags_rejected test uses 0x800000000ULL (1ULL << 35) to test
that clone3() rejects unknown 64-bit flags with -EINVAL.

However, bit 35 has been allocated to CLONE_NNP, causing clone3() to
succeed and the assertion expecting failure to fail.

Switch to (1ULL << 63) which is an unused high bit so the test
consistently expects -EINVAL.

Fixes: 5b8ffd63fbd9 ("selftests/filesystems: add clone3 tests for empty mount namespaces")
Signed-off-by: Disha Goel <disgoel@xxxxxxxxxxxxx>
---
 .../selftests/filesystems/empty_mntns/clone3_empty_mntns_test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/filesystems/empty_mntns/clone3_empty_mntns_test.c b/tools/testing/selftests/filesystems/empty_mntns/clone3_empty_mntns_test.c
index de0cbd1a5ee0..b271fed3ae70 100644
--- a/tools/testing/selftests/filesystems/empty_mntns/clone3_empty_mntns_test.c
+++ b/tools/testing/selftests/filesystems/empty_mntns/clone3_empty_mntns_test.c
@@ -868,7 +868,7 @@ TEST(unknown_flags_rejected)
 
 	if (pid == 0) {
 		struct __clone_args args = {
-			.flags		= 0x800000000ULL,
+			.flags		= (1ULL << 63),
 			.exit_signal	= SIGCHLD,
 		};
 		pid_t ret;
-- 
2.45.1