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

["H.J. Lu" <hjl.tools@gmail.com>]

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On Tue, Apr 3, 2018 at 9:15 AM, Adhemerval Zanella
<adhemerval.zanella@linaro.org> wrote:
>
>
> On 03/04/2018 13:07, H.J. Lu wrote:
>> Add RWF_APPEND to RWF_SUPPORTED to support Linux kernel 4.16.
>>
>> OK for master?
>
> Now 4.16 is out we need to update sysdeps/unix/sysv/linux/bits/uio-ext.h,
> bits/uio-ext.h, and manual/llio.texi as well.
>

Here is the updated patch.  OK for master?

-- 
H.J.

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From c5752a44152a097609c7a2898fdf0c88d5b4a17f Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Wed, 14 Mar 2018 09:54:28 -0700
Subject: [PATCH] Update RWF_SUPPORTED for Linux kernel 4.16 [BZ #22947]

Add RWF_APPEND to RWF_SUPPORTED to support Linux kernel 4.16.

	[BZ #22947]
	* bits/uio-ext.h (RWF_APPEND): New.
	* sysdeps/unix/sysv/linux/bits/uio-ext.h (RWF_APPEND): Likewise.
	* manual/llio.texi: Document RWF_APPEND.
	* misc/tst-preadvwritev2-common.c (RWF_APPEND): New.
	(RWF_SUPPORTED): Add RWF_APPEND.
---
 bits/uio-ext.h                         | 1 +
 manual/llio.texi                       | 3 +++
 misc/tst-preadvwritev2-common.c        | 6 +++++-
 sysdeps/unix/sysv/linux/bits/uio-ext.h | 1 +
 4 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/bits/uio-ext.h b/bits/uio-ext.h
index 8c15a05d9a..d5aa06fd08 100644
--- a/bits/uio-ext.h
+++ b/bits/uio-ext.h
@@ -28,5 +28,6 @@
 #define RWF_DSYNC	0x00000002 /* per-IO O_DSYNC.  */
 #define RWF_SYNC	0x00000004 /* per-IO O_SYNC.  */
 #define RWF_NOWAIT	0x00000008 /* per-IO nonblocking mode.  */
+#define RWF_APPEND	0x00000010 /* per-IO O_APPEND.  */
 
 #endif /* sys/uio_ext.h */
diff --git a/manual/llio.texi b/manual/llio.texi
index b4fd5e1d91..82f03be2be 100644
--- a/manual/llio.texi
+++ b/manual/llio.texi
@@ -1275,6 +1275,9 @@ Per-IO synchronization as if the file was opened with @code{O_SYNC} flag.
 @item RWF_NOWAIT
 Use nonblocking mode for this operation; that is, this call to @code{preadv2}
 will fail and set @code{errno} to @code{EAGAIN} if the operation would block.
+
+@item RWF_APPEND
+Per-IO synchronization as if the file was opened with @code{O_APPEND} flag.
 @end vtable
 
 When the source file is compiled with @code{_FILE_OFFSET_BITS == 64} the
diff --git a/misc/tst-preadvwritev2-common.c b/misc/tst-preadvwritev2-common.c
index 89fd0a3ff5..f889a21544 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 0
+#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);
diff --git a/sysdeps/unix/sysv/linux/bits/uio-ext.h b/sysdeps/unix/sysv/linux/bits/uio-ext.h
index 53663ed1a2..8698bc1200 100644
--- a/sysdeps/unix/sysv/linux/bits/uio-ext.h
+++ b/sysdeps/unix/sysv/linux/bits/uio-ext.h
@@ -46,6 +46,7 @@ extern ssize_t process_vm_writev (pid_t __pid, const struct iovec *__lvec,
 #define RWF_DSYNC	0x00000002 /* per-IO O_DSYNC.  */
 #define RWF_SYNC	0x00000004 /* per-IO O_SYNC.  */
 #define RWF_NOWAIT	0x00000008 /* per-IO nonblocking mode.  */
+#define RWF_APPEND	0x00000010 /* per-IO O_APPEND.  */
 
 __END_DECLS
 
-- 
2.14.3