--- /dev/null
+From hargar@linux.microsoft.com Sun May 28 08:40:32 2023
+From: Hardik Garg <hargar@linux.microsoft.com>
+Date: Fri, 26 May 2023 16:21:36 -0700
+Subject: selftests/memfd: Fix unknown type name build failure
+To: stable@vger.kernel.org
+Cc: shuah@kernel.org, jeffxu@google.com, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, code@tyhicks.com, niyelchu@linux.microsoft.com
+Message-ID: <20230526232136.255244-1-hargar@linux.microsoft.com>
+
+From: Hardik Garg <hargar@linux.microsoft.com>
+
+Partially backport v6.3 commit 11f75a01448f ("selftests/memfd: add tests
+for MFD_NOEXEC_SEAL MFD_EXEC") to fix an unknown type name build error.
+In some systems, the __u64 typedef is not present due to differences in
+system headers, causing compilation errors like this one:
+
+fuse_test.c:64:8: error: unknown type name '__u64'
+ 64 | static __u64 mfd_assert_get_seals(int fd)
+
+This header includes the __u64 typedef which increases the likelihood
+of successful compilation on a wider variety of systems.
+
+Signed-off-by: Hardik Garg <hargar@linux.microsoft.com>
+Reviewed-by: Tyler Hicks (Microsoft) <code@tyhicks.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ tools/testing/selftests/memfd/fuse_test.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+--- a/tools/testing/selftests/memfd/fuse_test.c
++++ b/tools/testing/selftests/memfd/fuse_test.c
+@@ -22,6 +22,7 @@
+ #include <linux/falloc.h>
+ #include <fcntl.h>
+ #include <linux/memfd.h>
++#include <linux/types.h>
+ #include <sched.h>
+ #include <stdio.h>
+ #include <stdlib.h>