linux-kernel - [PATCH] scripts/coccinelle/misc/warn.cocci: use WARN

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Message-Id: <1351972929-7448-1-git-send-email-Julia.Lawall@lip6.fr>
Date:	Sat,  3 Nov 2012 21:02:09 +0100
From:	Julia Lawall <Julia.Lawall@...6.fr>
To:	Michal Marek <mmarek@...e.cz>
Cc:	kernel-janitors@...r.kernel.org,
	Gilles Muller <Gilles.Muller@...6.fr>,
	Nicolas Palix <nicolas.palix@...g.fr>, cocci@...teme.lip6.fr,
	linux-kernel@...r.kernel.org
Subject: [PATCH] scripts/coccinelle/misc/warn.cocci: use WARN

From: Julia Lawall <Julia.Lawall@...6.fr>

Use WARN(1,...) rather than printk followed by WARN(1).

Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

---
 scripts/coccinelle/misc/warn.cocci |  109 +++++++++++++++++++++++++++++++++++++
 1 file changed, 109 insertions(+)

diff --git a/scripts/coccinelle/misc/warn.cocci b/scripts/coccinelle/misc/warn.cocci
new file mode 100644
index 0000000..fda8c35
--- /dev/null
+++ b/scripts/coccinelle/misc/warn.cocci
@@ -0,0 +1,109 @@
+/// Use WARN(1,...) rather than printk followed by WARN_ON(1)
+///
+// Confidence: High
+// Copyright: (C) 2012 Julia Lawall, INRIA/LIP6.  GPLv2.
+// Copyright: (C) 2012 Gilles Muller, INRIA/LiP6.  GPLv2.
+// URL: http://coccinelle.lip6.fr/
+// Comments:
+// Options: -no_includes -include_headers
+
+virtual patch
+virtual context
+virtual org
+virtual report
+
+@...1@
+position p;
+@@
+
+printk(...);
+printk@p(...);
+WARN_ON(1);
+
+@r1 depends on context || report || org@
+position p != bad1.p;
+@@
+
+ printk@p(...);
+*WARN_ON(1);
+
+@...ipt:python depends on org@
+p << r1.p;
+@@
+
+cocci.print_main("printk + WARN_ON can be just WARN",p)
+
+@...ipt:python depends on report@
+p << r1.p;
+@@
+
+msg = "SUGGESTION: printk + WARN_ON can be just WARN"
+coccilib.report.print_report(p[0],msg)
+
+@ok1 depends on patch@
+expression list es;
+position p != bad1.p;
+@@
+
+-printk@p(
++WARN(1,
+  es);
+-WARN_ON(1);
+
+@...ends on patch@
+expression list ok1.es;
+@@
+
+if (...)
+- {
+  WARN(1,es);
+- }
+
+// --------------------------------------------------------------------
+
+@...2@
+position p;
+@@
+
+printk(...);
+printk@p(...);
+WARN_ON_ONCE(1);
+
+@r2 depends on context || report || org@
+position p != bad1.p;
+@@
+
+ printk@p(...);
+*WARN_ON_ONCE(1);
+
+@...ipt:python depends on org@
+p << r2.p;
+@@
+
+cocci.print_main("printk + WARN_ON_ONCE can be just WARN_ONCE",p)
+
+@...ipt:python depends on report@
+p << r2.p;
+@@
+
+msg = "SUGGESTION: printk + WARN_ON_ONCE can be just WARN_ONCE"
+coccilib.report.print_report(p[0],msg)
+
+@ok2 depends on patch@
+expression list es;
+position p != bad2.p;
+@@
+
+-printk@p(
++WARN_ONCE(1,
+  es);
+-WARN_ON_ONCE(1);
+
+@...ends on patch@
+expression list ok2.es;
+@@
+
+if (...)
+- {
+  WARN_ONCE(1,es);
+- }

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