linux-kernel - [PATCH v2] coccinelle: api: add kobj_to

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Message-Id: <20200821201137.446423-1-efremov@linux.com>
Date:   Fri, 21 Aug 2020 23:11:37 +0300
From:   Denis Efremov <efremov@...ux.com>
To:     Julia Lawall <Julia.Lawall@...6.fr>
Cc:     Denis Efremov <efremov@...ux.com>, cocci@...teme.lip6.fr,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2] coccinelle: api: add kobj_to_dev.cocci script

Use kobj_to_dev() instead of container_of().

Signed-off-by: Denis Efremov <efremov@...ux.com>
---
Changes in v2:
 - "symbol kobj;" added to the rule r

 scripts/coccinelle/api/kobj_to_dev.cocci | 45 ++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 scripts/coccinelle/api/kobj_to_dev.cocci

diff --git a/scripts/coccinelle/api/kobj_to_dev.cocci b/scripts/coccinelle/api/kobj_to_dev.cocci
new file mode 100644
index 000000000000..cd5d31c6fe76
--- /dev/null
+++ b/scripts/coccinelle/api/kobj_to_dev.cocci
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0-only
+///
+/// Use kobj_to_dev() instead of container_of()
+///
+// Confidence: High
+// Copyright: (C) 2020 Denis Efremov ISPRAS
+// Options: --no-includes --include-headers
+//
+// Keywords: kobj_to_dev, container_of
+//
+
+virtual context
+virtual report
+virtual org
+virtual patch
+
+
+@r depends on !patch@
+expression ptr;
+symbol kobj;
+position p;
+@@
+
+* container_of(ptr, struct device, kobj)@p
+
+
+@...ends on patch@
+expression ptr;
+@@
+
+- container_of(ptr, struct device, kobj)
++ kobj_to_dev(ptr)
+
+
+@...ipt:python depends on report@
+p << r.p;
+@@
+
+coccilib.report.print_report(p[0], "WARNING opportunity for kobj_to_dev()")
+
+@...ipt:python depends on org@
+p << r.p;
+@@
+
+coccilib.org.print_todo(p[0], "WARNING opportunity for kobj_to_dev()")
-- 
2.26.2