[PATCH 1/3] checkpatch: Check for use of disallowed macros

[Rasmus Villemoes <linux@rasmusvillemoes.dk>]

Since fe7c36c7 ("Makefile: Build with -Werror=date-time if the
compiler supports it"), use of __DATE__, __TIME__, __TIMESTAMP__ has
been disallowed. This hasn't prevented a few new users from creeping
in. Make checkpatch complain.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
---
 scripts/checkpatch.pl | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index f0bb6d60c07b..7fafd3b45539 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3008,6 +3008,12 @@ sub process {
 		$line =~ s@//.*@@;
 		$opline =~ s@//.*@@;
 
+
+# Use of __DATE__, __TIME__, __TIMESTAMP__ is not allowed
+		if ($line =~ m/\b__(?:DATE|TIME|TIMESTAMP)__\b/) {
+		    ERROR("DATETIME", "Do not use the macros __DATE__, __TIME__ and __TIMESTAMP__\n" . $herecurr)
+		}
+
 # EXPORT_SYMBOL should immediately follow the thing it is exporting, consider
 # the whole statement.
 #print "APW <$lines[$realline_next - 1]>\n";
-- 
2.1.3