On Fri, Aug 16, 2013 at 12:31:59AM -0700, David Miller wrote:

From: Asias He <redacted>
Date: Fri, 16 Aug 2013 09:27:43 +0800

quoted

On Thu, Aug 15, 2013 at 02:07:40PM -0700, David Miller wrote:

quoted

From: Asias He <redacted>
Date: Thu, 15 Aug 2013 11:20:16 +0800

quoted

memcpy_fromiovec is moved to lib/iovec.c. No need to include
linux/socket.h for it.

Signed-off-by: Asias He <redacted>

You can't do this.

Because this file doesn't include the header file that
provides the declaration, which is linux/uio.h

vhost.c includes drivers/vhost/vhost.h. In drivers/vhost/vhost.h, we
have linux/uio.h included.

Nothing in vhost.h needs linux/uio.h right?  That's very poor style,
include the header where the dependency exists which is vhost.c

It needs struct iovec, which is in include/uapi/linux/uio.h.
Do you think it's better to include uapi/linux/uio.h directly?
In that case maybe we should update linux/socket.h
to pull in uapi/linux/uio.h directly too.

Or even just forward-declare struct iovec.
I tried this last option and the only fall-out seems to be in security/
- though I didn't do an allyes config build yet.  Good idea? If yes let
me know and I'll do that.

-->

socket: forward-declare struct iovec

We can simplify header dependencies by using a forward declaration
of struct iovec in socket.h - it's always used through a pointer there.
Do this and fix up users that rely on socket.h including uio.h.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

---

diff --git a/include/linux/socket.h b/include/linux/socket.h
index 230c04b..3ad6f52 100644
--- a/include/linux/socket.h
+++ b/include/linux/socket.h

@@ -4,7 +4,6 @@
 
 #include <asm/socket.h>			/* arch-dependent defines	*/
 #include <linux/sockios.h>		/* the SIOCxxx I/O controls	*/
-#include <linux/uio.h>			/* iovec support		*/
 #include <linux/types.h>		/* pid_t			*/
 #include <linux/compiler.h>		/* __user			*/
 #include <uapi/linux/socket.h>

@@ -44,6 +43,8 @@ struct linger {
  *	belong in an obscure libc emulation or the bin.
  */
  
+struct iovec;
+
 struct msghdr {
 	void	*	msg_name;	/* Socket name			*/
 	int		msg_namelen;	/* Length of name		*/

diff --git a/security/keys/compat.c b/security/keys/compat.c
index d65fa7f..9c2723f 100644
--- a/security/keys/compat.c
+++ b/security/keys/compat.c

@@ -13,6 +13,7 @@
 #include <linux/keyctl.h>
 #include <linux/compat.h>
 #include <linux/slab.h>
+#include <uapi/linux/uio.h>
 #include "internal.h"
 
 /*

-- 
MST