[PATCH] checkpatch: Fix bad FILE_PATH_CHANGES on headers

["Pierre-Clément Tosi" <ptosi@google.com>]

The FILE_PATH_CHANGES warning ("added, moved or deleted file(s), does
MAINTAINERS need updating?") added by commit 13f1937ef339 ("checkpatch:
emit a warning on file add/move/delete") was guarded by !$in_commit_log
so that commit message lines would not be mistaken for diffstat or diff
header lines.

However, it was still evaluated on the initial email header lines
($in_header_lines == 1) such that a title using the rename notation e.g.

    Subject: [PATCH] foo: rework bar_{get=>set}_baz()

triggers a false-positive warning. Furthermore, that same (wrong) code
path sets $is_patch prematurely.

Instead, only test for FILE_PATH_CHANGES when !$in_header_lines.

Fixes: 13f1937ef339 ("checkpatch: emit a warning on file add/move/delete")
Signed-off-by: Pierre-Clément Tosi <ptosi@google.com>
---
 scripts/checkpatch.pl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index b8b64f720191..03e3e4b72cdd 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3481,7 +3481,7 @@ sub process {
 		}
 
 # Check for added, moved or deleted files
-		if (!$reported_maintainer_file && !$in_commit_log &&
+		if (!$reported_maintainer_file && !$in_commit_log && !$in_header_lines &&
 		    ($line =~ /^(?:new|deleted) file mode\s*\d+\s*$/ ||
 		     $line =~ /^rename (?:from|to) [\w\/\.\-]+\s*$/ ||
 		     ($line =~ /\{\s*([\w\/\.\-]*)\s*\=\>\s*([\w\/\.\-]*)\s*\}/ &&

---
base-commit: 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4
change-id: 20261107-checkpatch-file_path_changes-ac920c85bc7e

Best regards,
-- 
Pierre-Clément Tosi <ptosi@google.com>