[PATCH] Update RWF_SUPPORTED for Linux kernel 4.16 [BZ #22947]

[H.J. Lu]

Add RWF_APPEND to RWF_SUPPORTED to support Linux kernel 4.16.

OK for master?

H.J.
---
	[BZ #22947]
	* misc/tst-preadvwritev2-common.c (RWF_APPEND): New.
	(RWF_SUPPORTED): Add RWF_APPEND.
---
 misc/tst-preadvwritev2-common.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/misc/tst-preadvwritev2-common.c b/misc/tst-preadvwritev2-common.c
index 89fd0a3ff5..99d385173b 100644
--- a/misc/tst-preadvwritev2-common.c
+++ b/misc/tst-preadvwritev2-common.c
@@ -34,7 +34,11 @@ do_test_with_invalid_flags (void)
 #ifndef RWF_NOWAIT
 # define RWF_NOWAIT 0
 #endif
-#define RWF_SUPPORTED	(RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT)
+#ifndef RWF_APPEND
+# define RWF_APPEND 0x10
+#endif
+#define RWF_SUPPORTED	(RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT \
+			 | RWF_APPEND)
   /* Set the next bit from the mask of all supported flags.  */
   int invalid_flag = RWF_SUPPORTED != 0 ? __builtin_clz (RWF_SUPPORTED) : 2;
   invalid_flag = 0x1 << ((sizeof (int) * CHAR_BIT) - invalid_flag);
-- 
2.14.3