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Subject[PATCH] checkpatch: Warn when a patch doesn't have a description
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Potential patches should have a commit description.
Emit a warning when there isn't one.

Suggested-by: Prakruthi Deepak Heragu <pheragu@codeaurora.org>
Signed-off-by: Joe Perches <joe@perches.com>
---
scripts/checkpatch.pl | 13 +++++++++++++
1 file changed, 13 insertions(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index b5c875d7132b..8b5f3dae31c9 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2240,6 +2240,7 @@ sub process {
my $in_header_lines = $file ? 0 : 1;
my $in_commit_log = 0; #Scanning lines before patch
my $has_commit_log = 0; #Encountered lines before patch
+ my $commit_log_lines = 0; #Number of commit log lines
my $commit_log_possible_stack_dump = 0;
my $commit_log_long_line = 0;
my $commit_log_has_diff = 0;
@@ -2497,6 +2498,18 @@ sub process {

$cnt_lines++ if ($realcnt != 0);

+# Verify the existence of a commit log if appropriate
+# 2 is used because a $signature is counted in $commit_log_lines
+ if ($in_commit_log) {
+ if ($line !~ /^\s*$/) {
+ $commit_log_lines++; #could be a $signature
+ }
+ } else if ($has_commit_log && $commit_log_lines < 2) {
+ WARN("COMMIT_MESSAGE",
+ "Missing commit description - Add an appropriate one\n");
+ $commit_log_lines = 2; #warn only once
+ }
+
# Check if the commit log has what seems like a diff which can confuse patch
if ($in_commit_log && !$commit_log_has_diff &&
(($line =~ m@^\s+diff\b.*a/[\w/]+@ &&
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