From 7e97526421b0a1180fb16fbfcf8a758e48d529e6 Mon Sep 17 00:00:00 2001
From: Frantisek Sumsal <frantisek@sumsal.cz>
Date: Wed, 7 Oct 2020 15:26:16 +0200
Subject: [PATCH] coccinelle: check for invalid errno comparisons

Prompted by #15868
---
 coccinelle/errno-check.cocci | 10 ++++++++++
 1 file changed, 10 insertions(+)
 create mode 100644 coccinelle/errno-check.cocci

diff --git a/coccinelle/errno-check.cocci b/coccinelle/errno-check.cocci
new file mode 100644
index 0000000000..709cb4ace6
--- /dev/null
+++ b/coccinelle/errno-check.cocci
@@ -0,0 +1,10 @@
+@@
+constant c;
+@@
+(
+- errno == -c
++ errno == c
+|
+- errno != -c
++ errno != c
+)