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

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

[Joseph Myers]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=a02cd8e4e091201cb395a805a9f3e2a9981cae37

commit a02cd8e4e091201cb395a805a9f3e2a9981cae37
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Wed Aug 7 17:01:13 2019 +0000

    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.

Diff:
---
 ChangeLog                                  | 5 +++++
 sysdeps/unix/sysv/linux/bits/fcntl-linux.h | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index 53ccbf5..760698b 100644
--- a/ChangeLog
+++ b/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.
diff --git a/sysdeps/unix/sysv/linux/bits/fcntl-linux.h b/sysdeps/unix/sysv/linux/bits/fcntl-linux.h
index 3f32eb3..ad9bf1b 100644
--- a/sysdeps/unix/sysv/linux/bits/fcntl-linux.h
+++ b/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.  */