doc/develop/codingstyle.rst: Clarify include section

Rework the section about includes slightly. We should not be using
common.h anywhere, so remove that from examples and ask people to send
patches removing it when found. Doing this also means we need to reword
other parts of this section. Be clearer about using alphabetical
ordering.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Igor Opaniuk <igor.opaniuk@gmail.com>

diff --git a/doc/develop/codingstyle.rst b/doc/develop/codingstyle.rst
index b25bfbd271f0e89b55da071e089999ca7efe7595..f6248cdcb1e1d7419da478296aea79155ac4a87d 100644 (file)
--- a/doc/develop/codingstyle.rst
+++ b/doc/develop/codingstyle.rst
@@ -108,30 +108,29 @@ expected size, or that particular members appear at the right offset.
 Include files
 -------------
 
-You should follow this ordering in U-Boot. The common.h header (which is going
-away at some point) should always be first, followed by other headers in order,
-then headers with directories, then local files:
+You should follow this ordering in U-Boot. In all cases, they should be listed
+in alphabetical order. First comes headers which are located directly in our
+top-level include diretory. This excludes the common.h header file which is to
+be removed. Second are headers within subdirectories, Finally directory-local
+includes should be listed. See this example:
 
 .. code-block:: C
 
-   #include <common.h>
    #include <bootstage.h>
    #include <dm.h>
    #include <others.h>
    #include <asm/...>
-   #include <arm/arch/...>
+   #include <asm/arch/...>
    #include <dm/device_compat.h>
    #include <linux/...>
    #include "local.h"
 
-Within that order, sort your includes.
-
-It is important to include common.h first since it provides basic features used
-by most files, e.g. CONFIG options.
-
 For files that need to be compiled for the host (e.g. tools), you need to use
-``#ifndef USE_HOSTCC`` to avoid including common.h since it includes a lot of
-internal U-Boot things. See common/image.c for an example.
+``#ifndef USE_HOSTCC`` to avoid including U-Boot specific include files. See
+common/image.c for an example.
+
+If you encounter code which still uses <common.h> a patch to remove that and
+replace it with any required include files directly is much appreciated.
 
 If your file uses driver model, include <dm.h> in the C file. Do not include
 dm.h in a header file. Try to use forward declarations (e.g. ``struct