[PATCH 02/11] selftests: ublk: fix build failure

[Ming Lei]

Fixes the following build failure:

ublk//file_backed.c: In function ‘backing_file_tgt_init’:
ublk//file_backed.c:28:42: error: ‘O_DIRECT’ undeclared (first use in this 
function); did you mean ‘O_DIRECTORY’?
   28 |                 fd = open(file, O_RDWR | O_DIRECT);
      |                                          ^~~~~~~~
      |                                          O_DIRECTORY

when trying to reuse this same utility for liburing test.

Signed-off-by: Ming Lei <ming....@redhat.com>
---
 tools/testing/selftests/ublk/kublk.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/ublk/kublk.h 
b/tools/testing/selftests/ublk/kublk.h
index 8e43aebf7dfc..8f48eb8568ab 100644
--- a/tools/testing/selftests/ublk/kublk.h
+++ b/tools/testing/selftests/ublk/kublk.h
@@ -12,6 +12,7 @@
 #include <getopt.h>
 #include <limits.h>
 #include <poll.h>
+#include <fcntl.h>
 #include <sys/syscall.h>
 #include <sys/mman.h>
 #include <sys/ioctl.h>
-- 
2.47.0