|author||Paul Jackson <email@example.com>||2005-10-02 18:01:42 -0700|
|committer||Linus Torvalds <firstname.lastname@example.org>||2005-10-02 18:28:09 -0700|
[PATCH] 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 <email@example.com> Signed-off-by: Linus Torvalds <firstname.lastname@example.org>
Diffstat (limited to 'Documentation/SubmittingPatches')
1 files changed, 69 insertions, 1 deletions
diff --git a/Documentation/SubmittingPatches b/Documentation/SubmittingPatches
index 7f43b040311..1d96efec5e8 100644
@@ -301,8 +301,68 @@ now, but you can do this to mark internal company procedures or just
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
+The "from" line must be the very first line in the message body,
+and has the form:
+ From: Original Author <email@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.
+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
+13) More references for submitting patches
Andrew Morton, "The perfect patch" (tpp).
@@ -310,6 +370,14 @@ Andrew Morton, "The perfect patch" (tpp).
Jeff Garzik, "Linux kernel patch submission format."
+Greg KH, "How to piss off a kernel subsystem maintainer"
+Linus Torvald's mail on the canonical patch format: