[LTP] [PATCH] lapi/io_uring.h: Add declaration of __kernel_rwf_t

[Yang Xu]

Since kernel commit ddef7ed2b5cb ("annotate RWF_... flags"), fs.h introduced
 __kernel_rwf_t data type in 4.14-rc1.

Fix build error on old kernel.
In file included from io_uring01.c:20:
../../../../include/lapi/io_uring.h:38: error: expected specifier-qualifier-list before ‘__kernel_rwf_t’
io_uring01.c:266: warning: missing initializer
io_uring01.c:266: warning: (near initialization for ‘(anonymous)[1].ptr’)
io_uring01.c:268: warning: missing initializer
io_uring01.c:268: warning: (near initialization for ‘test.caps’)
make: *** [io_uring01] Error 1

Signed-off-by: Yang Xu <xuyang2018.jy@cn.fujitsu.com>
---
 include/lapi/io_uring.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/lapi/io_uring.h b/include/lapi/io_uring.h
index 8e47501a5..4a8978e87 100644
--- a/include/lapi/io_uring.h
+++ b/include/lapi/io_uring.h
@@ -12,6 +12,7 @@
 #include <unistd.h>
 #include <fcntl.h>
 #include <sys/types.h>
+#include <linux/types.h>
 #include <sys/uio.h>
 #include <stdlib.h>
 #include <linux/fs.h>
@@ -20,6 +21,10 @@
 
 #ifndef IOSQE_FIXED_FILE
 
+#ifndef __kernel_rwf_t
+typedef int __bitwise __kernel_rwf_t;
+#endif
+
 /*
  * IO submission data structure (Submission Queue Entry)
  */
-- 
2.23.0