checkpatch: emit an error when using predefined timestamp macros
Since commit fe7c36c7bde1 ("Makefile: Build with -Werror=date-time if
the compiler supports it"), use of __DATE__, __TIME__, and __TIMESTAMP__
has not been allowed.
As this test is gcc version specific (> 4.9), it hasn't prevented a few
new uses from creeping into the kernel sources.
Make checkpatch complain about them.
Signed-off-by: Joe Perches <joe@perches.com>
Original-patch-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index f0bb6d6..501c286 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -5089,6 +5089,12 @@
}
}
+# check for uses of __DATE__, __TIME__, __TIMESTAMP__
+ while ($line =~ /\b(__(?:DATE|TIME|TIMESTAMP)__)\b/g) {
+ ERROR("DATE_TIME",
+ "Use of the '$1' macro makes the build non-deterministic\n" . $herecurr);
+ }
+
# check for use of yield()
if ($line =~ /\byield\s*\(\s*\)/) {
WARN("YIELD",