Commit 62ec818f authored by Joe Perches's avatar Joe Perches Committed by Linus Torvalds
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checkpatch: emit an error when using predefined timestamp macros

Since commit fe7c36c7

 ("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: default avatarJoe Perches <>
Original-patch-by: default avatarRasmus Villemoes <>

Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 46385326
......@@ -5089,6 +5089,12 @@ sub process {
# check for uses of __DATE__, __TIME__, __TIMESTAMP__
while ($line =~ /\b(__(?:DATE|TIME|TIMESTAMP)__)\b/g) {
"Use of the '$1' macro makes the build non-deterministic\n" . $herecurr);
# check for use of yield()
if ($line =~ /\byield\s*\(\s*\)/) {
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