From 107df351c6f95ef15a045cde85697c0ee3b222b2 Mon Sep 17 00:00:00 2001
From: Donatas Abraitis <donatas.abraitis@gmail.com>
Date: Tue, 13 Jul 2021 08:48:11 +0300
Subject: [PATCH] tools: Add coccinelle script for hash compare functions NULL
 values

Signed-off-by: Donatas Abraitis <donatas.abraitis@gmail.com>
---
 .../hash_compare_null_values_check.cocci      | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 tools/coccinelle/hash_compare_null_values_check.cocci

diff --git a/tools/coccinelle/hash_compare_null_values_check.cocci b/tools/coccinelle/hash_compare_null_values_check.cocci
new file mode 100644
index 000000000000..38649a228273
--- /dev/null
+++ b/tools/coccinelle/hash_compare_null_values_check.cocci
@@ -0,0 +1,20 @@
+// There is no need to test for null values in the hash compare
+// function as that we are guaranteed to send in data in
+// the hash compare functions.
+@@
+identifier fn =~ "_hash_cmp";
+type T;
+identifier p1;
+identifier p2;
+@@
+
+?static
+T fn(...)
+{
+...
+- if (p1 == NULL && p2 == NULL)
+-	return ...;
+- if (p1 == NULL || p2 == NULL)
+-	return ...;
+...
+}