checkpatch: verify SPDX comment style

Using SPDX commenting style // or /* is specified for various file types
in Documentation/process/license-rules.rst so add an appropriate test for
.[chsS] files because many proposed file additions and patches do not use
the correct style.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Joe Perches <[email protected]>
Cc: Rob Herring <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index b737ca9d720441989b52d066130db5157a4172f7..c17cbc06911f9fcfd4af8391f460d41afe6339b2 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3037,6 +3037,14 @@ sub process {
                                        $comment = '..';
                                }
 
+# check SPDX comment style for .[chsS] files
+                               if ($realfile =~ /\.[chsS]$/ &&
+                                   $rawline =~ /SPDX-License-Identifier:/ &&
+                                   $rawline !~ /^\+\s*\Q$comment\E\s*/) {
+                                       WARN("SPDX_LICENSE_TAG",
+                                            "Improper SPDX comment style for '$realfile', please use '$comment' instead\n" . $herecurr);
+                               }
+
                                if ($comment !~ /^$/ &&
                                    $rawline !~ /^\+\Q$comment\E SPDX-License-Identifier: /) {
                                         WARN("SPDX_LICENSE_TAG",