1 files changed, 6 insertions, 0 deletions

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index a6d436809bf5..93a7edfe0f05 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -6639,6 +6639,12 @@ sub process {
                                      "unknown module license " . $extracted_string . "\n" . $herecurr);
                         }
                 }
+
+# check for sysctl duplicate constants
+                if ($line =~ /\.extra[12]\s*=\s*&(zero|one|int_max)\b/) {
+                        WARN("DUPLICATED_SYSCTL_CONST",
+                                "duplicated sysctl range checking value '$1', consider using the shared one in include/linux/sysctl.h\n" . $herecurr);
+                }
         }
 
         # If we have no input at all, then there is nothing to report on