diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 166552fd29e8..096dabbbaf6b 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3219,6 +3219,13 @@ sub process {
 			     "Use of volatile is usually wrong: see Documentation/volatile-considered-harmful.txt\n" . $herecurr);
 		}
 
+# readl & writel are unsafe, use the _relaxed variants
+		if ($line =~ /\b((?:read|write)l)\b/) {
+			ERROR("Use of $1 is deprecated: use $1_relaxed\n\t" .
+			      "with appropriate memory barriers instead.\n" .
+			      $herecurr);
+		}
+
 # warn about #if 0
 		if ($line =~ /^.\s*\#\s*if\s+0\b/) {
 			WARN("if this code is redundant consider removing it\n"