linux-kernel - [PATCH] checkpatch: Emit a warning on embedded filenames

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Date:   Thu, 01 Oct 2020 11:28:10 -0700
From:   Joe Perches <joe@...ches.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Andy Whitcroft <apw@...onical.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] checkpatch: Emit a warning on embedded filenames

Embedding the complete filename path inside the file
isn't particularly useful as often the path is moved
around and becomes incorrect.

Emit a warning when the source contains the filename.

Signed-off-by: Joe Perches <joe@...ches.com>
---
 scripts/checkpatch.pl | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index a213cdb82ab0..84d2ee118c55 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3273,6 +3273,12 @@ sub process {
 			}
 		}
 
+# check for embedded filenames
+		if ($rawline =~ /^\+.*\Q$realfile\E/) { di
+			WARN("EMBEDDED_FILENAME",
+			     "It's generally not useful to have the filename in the file\n" . $herecurr);
+		}
+
 # check we are in a valid source file if not then ignore this hunk
 		next if ($realfile !~ /\.(h|c|s|S|sh|dtsi|dts)$/);