Add SYNC_FILE_RANGE_WRITE_AND_WAIT from Linux 5.2 to bits/fcntl-linux.h.

This patch adds the SYNC_FILE_RANGE_WRITE_AND_WAIT constant from Linux
5.2 (a new name for a combination of existing bits, not actually a new
kernel interface) to bits/fcntl-linux.h.

Tested for x86_64.

	* sysdeps/unix/sysv/linux/bits/fcntl-linux.h [__USE_GNU]
	(SYNC_FILE_RANGE_WRITE_AND_WAIT): New macro.

ChangeLog

@@ -1,3 +1,8 @@
+2019-08-07  Joseph Myers  <joseph@codesourcery.com>
+
+	* sysdeps/unix/sysv/linux/bits/fcntl-linux.h [__USE_GNU]
+	(SYNC_FILE_RANGE_WRITE_AND_WAIT): New macro.
+
 2019-08-06  Joseph Myers  <joseph@codesourcery.com>
 
 	* io/fcntl.h [__USE_GNU] (AT_RECURSIVE): New macro.

sysdeps/unix/sysv/linux/bits/fcntl-linux.h

@@ -334,6 +334,11 @@ struct f_owner_ex
 # define SYNC_FILE_RANGE_WAIT_AFTER	4 /* Wait upon writeout of all pages in
 					     the range after performing the
 					     write.  */
+/* SYNC_FILE_RANGE_WRITE_AND_WAIT ensures all pages in the range are
+   written to disk before returning.  */
+# define SYNC_FILE_RANGE_WRITE_AND_WAIT	(SYNC_FILE_RANGE_WRITE		\
+					 | SYNC_FILE_RANGE_WAIT_BEFORE	\
+					 | SYNC_FILE_RANGE_WAIT_AFTER)
 
 /* Flags for SPLICE and VMSPLICE.  */
 # define SPLICE_F_MOVE		1	/* Move pages instead of copying.  */