[kvm-unit-tests PATCH] checkpatch: add support for Assisted-by tag

[Andrew Jones <andrew.jones@linux.dev>]

Import Linux commit d1db4118489f ("checkpatch: add support for
Assisted-by tag").

(I should have used AI for this, since it'd be fun to include that
tag on this tag-enabling patch, but sometimes I still do my own
homework!)

Signed-off-by: Andrew Jones <andrew.jones@linux.dev>
---
 scripts/checkpatch.pl | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index e858261c95a8..653bec1f6ea5 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -626,6 +626,7 @@ our $signature_tags = qr{(?xi:
 	Reviewed-by:|
 	Reported-by:|
 	Suggested-by:|
+	Assisted-by:|
 	To:|
 	Cc:
 )};
@@ -3073,6 +3074,15 @@ sub process {
 				}
 			}
 
+			# Assisted-by uses AGENT_NAME:MODEL_VERSION format, not email
+			if ($sign_off =~ /^Assisted-by:/i) {
+				if ($email !~ /^\S+:\S+/) {
+					WARN("BAD_SIGN_OFF",
+					     "Assisted-by expects 'AGENT_NAME:MODEL_VERSION [TOOL1] [TOOL2]' format\n" . $herecurr);
+				}
+				next;
+			}
+
 			my ($email_name, $name_comment, $email_address, $comment) = parse_email($email);
 			my $suggested_email = format_email(($email_name, $name_comment, $email_address, $comment));
 			if ($suggested_email eq "") {
-- 
2.43.0