diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index aa62850e2ba..c004a5931f4 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3284,6 +3284,12 @@ sub process {
 			      $herecurr);
 		}
 
+# dsb is too ARMish, and should usually be mb.
+		if ($line =~ /\bdsb\b/) {
+			WARN("Use of dsb is discouranged: prefer mb.\n" .
+			     $herecurr);
+		}
+
 # unbounded string functions are overflow risks
 		my %str_fns = (
 			"sprintf" => "snprintf",