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Subject[PATCHv4] Document from line in patch format
Document more details of patch format such as the "from" line
and the "---" marker line, and provide more references for
patch guidelines.

Signed-off-by: Paul Jackson <pj@sgi.com>

---

Fixed path to Coywolf's Documentation/CodingStyle

--- 2.6.14-rc2-mm2.orig/Documentation/SubmittingPatches
+++ 2.6.14-rc2-mm2/Documentation/SubmittingPatches
@@ -301,8 +301,71 @@ now, but you can do this to mark interna
point out some special detail about the sign-off.


+12) The canonical patch format

-12) More references for submitting patches
+The canonical patch subject line is:
+
+ Subject: [PATCH 001/123] [<area>:] <explanation>
+
+The canonical patch message body contains the following:
+
+ - A "from" line specifying the patch author.
+
+ - An empty line.
+
+ - The body of the explanation, which will be copied to the
+ permanent changelog to describe this patch.
+
+ - The "Signed-off-by:" lines, described above, which will
+ also go in the changelog.
+
+ - A marker line containing simply "---".
+
+ - Any additional comments not suitable for the changelog.
+
+ - The actual patch (diff output).
+
+The Subject line format makes it very easy to sort the emails
+alphabetically by subject line - pretty much any email reader will
+support that - since because the sequence number is zero-padded,
+the numerical and alphabetic sort is the same.
+
+See further details on how to phrase the "<explanation>" in the
+"Subject:" line in Andrew Morton's "The perfect patch", referenced
+below.
+
+The "from" line must be the very first line in the message body,
+and has the form:
+
+ From: Original Author <author@example.com>
+
+The "from" line specifies who will be credited as the author of the
+patch in the permanent changelog. If the "from" line is missing,
+then the "From:" line from the email header will be used to determine
+the patch author in the changelog.
+
+The explanation body will be committed to the permanent source
+changelog, so should make sense to a competent reader who has long
+since forgotten the immediate details of the discussion that might
+have led to this patch.
+
+The "---" marker line serves the essential purpose of marking for patch
+handling tools where the changelog message ends. As a compatibility
+hack, some of the patch handling tools take lines beginning with
+"diff -" or "Index: " as alternative forms of the "---" marker.
+The recommended form is "---".
+
+One good use for the additional comments after the "---" marker is for
+a diffstat, to show what files have changed, and the number of inserted
+and deleted lines per file. A diffstat is especially useful on bigger
+patches. Other comments relevant only to the moment or the maintainer,
+not suitable for the permanent changelog, should also go here.
+
+See more details on the proper patch format in the following
+references.
+
+
+13) More references for submitting patches

Andrew Morton, "The perfect patch" (tpp).
<http://www.zip.com.au/~akpm/linux/patches/stuff/tpp.txt>
@@ -310,6 +373,14 @@ Andrew Morton, "The perfect patch" (tpp)
Jeff Garzik, "Linux kernel patch submission format."
<http://linux.yyz.us/patch-format.html>

+Greg KH, "How to piss off a kernel subsystem maintainer"
+ <http://www.kroah.com/log/2005/03/31/>
+
+Kernel Documentation/CodingStyle
+ <http://sosdg.org/~coywolf/lxr/source/Documentation/CodingStyle>
+
+Linus Torvald's mail on the canonical patch format:
+ <http://lkml.org/lkml/2005/4/7/183>


-----------------------------------
--
I won't rest till it's the best ...
Programmer, Linux Scalability
Paul Jackson <pj@sgi.com> 1.650.933.1373
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