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Subject[PATCH 1/1] checkpatch: support "base-commit:" format
In order to support the tool described in [1], I ran:

git format-patch --base=<commit> --cover-letter <revrange>

...which generated a "base-commit: <commit-hash>" tag at the end of the
cover letter. However, generated an error upon encounting
"base-commit:" in the cover letter:

"ERROR: Please use git commit description style..."

...because it found the "commit" keyword, and failed to recognize that
it was part of the "base-commit" phrase, and as such, should not be
subjected to the same commit description style rules.

Update to include a special case for "base-commit:", so
that that tag no longer generates a checkpatch error.

[1] "Better tools for kernel

Cc: Andy Whitcroft <>
Cc: Joe Perches <>
Cc: Konstantin Ryabitsev <>
Cc: Jonathan Corbet <>
Signed-off-by: John Hubbard <>
scripts/ | 1 +
1 file changed, 1 insertion(+)

diff --git a/scripts/ b/scripts/
index a63380c6b0d2..f241865cedb3 100755
--- a/scripts/
+++ b/scripts/
@@ -2761,6 +2761,7 @@ sub process {

# Check for git id commit length and improperly formed commit descriptions
if ($in_commit_log && !$commit_log_possible_stack_dump &&
+ $line !~ /base-commit:/ &&
$line !~ /^\s*(?:Link|Patchwork|http|https|BugLink):/i &&
$line !~ /^This reverts commit [0-9a-f]{7,40}/ &&
($line =~ /\bcommit\s+[0-9a-f]{5,}\b/i ||
 \ /
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