[Qemu-devel] [PATCH v3 1/2] Revert xen/io/ring.h of "Clean up a few header guard symbols"

[Anthony PERARD <anthony.perard@citrix.com>]

This reverts changes to include/hw/xen/io/ring.h from commit
37677d7db39a3c250ad661d00fb7c3b59d047b1f.

Following 37677d7db3 "Clean up a few header guard symbols", QEMU start
to fail to build:

In file included from ~/xen/tools/../tools/include/xen/io/blkif.h:31:0,
                 from ~/xen/tools/qemu-xen-dir/hw/block/xen_blkif.h:5,
                 from ~/xen/tools/qemu-xen-dir/hw/block/xen-block.c:22:
~/xen/tools/../tools/include/xen/io/ring.h:68:0: error: "__CONST_RING_SIZE" redefined [-Werror]
 #define __CONST_RING_SIZE(_s, _sz) \

In file included from ~/xen/tools/qemu-xen-dir/hw/block/xen_blkif.h:4:0,
                 from ~/xen/tools/qemu-xen-dir/hw/block/xen-block.c:22:
~/xen/tools/qemu-xen-dir/include/hw/xen/io/ring.h:66:0: note: this is the location of the previous definition
 #define __CONST_RING_SIZE(_s, _sz) \

The issue is that some public xen headers have been imported (by
f65eadb639 "xen: import ring.h from xen") but not all. With the change
in the guards symbole, the ring.h header start to be imported twice.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
---
CC: Markus Armbruster <armbru@redhat.com>
---

Notes:
    v3:
    - new patch, replace "xen: Fix build with public headers" from previous
      patch series version
    - Revert problematic change instead.

 include/hw/xen/io/ring.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/hw/xen/io/ring.h b/include/hw/xen/io/ring.h
index 62abfd7a6e..1adacf09f9 100644
--- a/include/hw/xen/io/ring.h
+++ b/include/hw/xen/io/ring.h
@@ -24,8 +24,8 @@
  * Tim Deegan and Andrew Warfield November 2004.
  */
 
-#ifndef XEN_PUBLIC_IO_RING_H
-#define XEN_PUBLIC_IO_RING_H
+#ifndef __XEN_PUBLIC_IO_RING_H__
+#define __XEN_PUBLIC_IO_RING_H__
 
 /*
  * When #include'ing this header, you need to provide the following
@@ -469,7 +469,7 @@ struct name##_data_intf {                                                     \
 };                                                                            \
 DEFINE_XEN_FLEX_RING(name)
 
-#endif /* XEN_PUBLIC_IO_RING_H */
+#endif /* __XEN_PUBLIC_IO_RING_H__ */
 
 /*
  * Local variables:
-- 
Anthony PERARD