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authorMarkus Armbruster <armbru@redhat.com>2019-08-12 07:23:31 +0200
committerMarkus Armbruster <armbru@redhat.com>2019-08-16 13:31:51 +0200
commitec150c7e09071bcf51bfaa8071fe23efb6df69f7 (patch)
tree1226162aa31d0fc73ee0ed389fe3719d79ff7201 /include/block/write-threshold.h
parentf8f2eac4e5de8ce8ef17591ee1b84904437be25b (diff)
downloadfocaccia-qemu-ec150c7e09071bcf51bfaa8071fe23efb6df69f7.tar.gz
focaccia-qemu-ec150c7e09071bcf51bfaa8071fe23efb6df69f7.zip
include: Make headers more self-contained
Back in 2016, we discussed[1] rules for headers, and these were
generally liked:

1. Have a carefully curated header that's included everywhere first.  We
   got that already thanks to Peter: osdep.h.

2. Headers should normally include everything they need beyond osdep.h.
   If exceptions are needed for some reason, they must be documented in
   the header.  If all that's needed from a header is typedefs, put
   those into qemu/typedefs.h instead of including the header.

3. Cyclic inclusion is forbidden.

This patch gets include/ closer to obeying 2.

It's actually extracted from my "[RFC] Baby steps towards saner
headers" series[2], which demonstrates a possible path towards
checking 2 automatically.  It passes the RFC test there.

[1] Message-ID: <87h9g8j57d.fsf@blackfin.pond.sub.org>
    https://lists.nongnu.org/archive/html/qemu-devel/2016-03/msg03345.html
[2] Message-Id: <20190711122827.18970-1-armbru@redhat.com>
    https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg02715.html

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20190812052359.30071-2-armbru@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Diffstat (limited to 'include/block/write-threshold.h')
-rw-r--r--include/block/write-threshold.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/block/write-threshold.h b/include/block/write-threshold.h
index 80d8aab5d0..c646f267a4 100644
--- a/include/block/write-threshold.h
+++ b/include/block/write-threshold.h
@@ -9,9 +9,11 @@
  * This work is licensed under the terms of the GNU LGPL, version 2 or later.
  * See the COPYING.LIB file in the top-level directory.
  */
+
 #ifndef BLOCK_WRITE_THRESHOLD_H
 #define BLOCK_WRITE_THRESHOLD_H
 
+#include "block/block_int.h"
 
 /*
  * bdrv_write_threshold_set: