[PATCH v2] checkpatch: allow build files to reference other build files

[Will McVicker <willmcvicker@google.com>]

Add an exception to the EMBEDDED_FILENAME warning for build files. This
fixes the below warnings where the Kconfig and Makefile files reference
other similarly named build files.

  WARNING:EMBEDDED_FILENAME: It's generally not useful to have the filename in the file
  #24: FILE: Kconfig:34:
  +source "drivers/willmcvicker/Kconfig"

  WARNING:EMBEDDED_FILENAME: It's generally not useful to have the filename in the file
  #36: FILE: Makefile:667:
  +	} > Makefile

Signed-off-by: Will McVicker <willmcvicker@google.com>
---
 scripts/checkpatch.pl | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

v2:
- Unwrap commit message lines
- Align and update regex


diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index f8343b34a28b..c2869803e545 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3785,7 +3785,8 @@ sub process {
 		}
 
 # check for embedded filenames
-		if ($rawline =~ /^\+.*\b\Q$realfile\E\b/) {
+		if ($rawline =~ /^\+.*\b\Q$realfile\E\b/ &&
+		    $realfile !~ /(?:Kconfig|Makefile)/) {
 			WARN("EMBEDDED_FILENAME",
 			     "It's generally not useful to have the filename in the file\n" . $herecurr);
 		}

base-commit: 70d201a40823acba23899342d62bc2644051ad2e
-- 
2.43.0.275.g3460e3d667-goog