From: Denis Efremov <efremov@linux.com>
To: cocci@systeme.lip6.fr
Cc: Denis Efremov <efremov@linux.com>,
linux-kernel@vger.kernel.org, Julia Lawall <Julia.Lawall@lip6.fr>,
Gilles Muller <Gilles.Muller@lip6.fr>,
Nicolas Palix <nicolas.palix@imag.fr>,
Michal Marek <michal.lkml@markovi.net>
Subject: [PATCH] scripts: coccinelle: check for !(un)?likely usage
Date: Sun, 25 Aug 2019 16:05:36 +0300 [thread overview]
Message-ID: <20190825130536.14683-1-efremov@linux.com> (raw)
This patch adds coccinelle script for detecting !likely and !unlikely
usage. It's better to use unlikely instead of !likely and vice versa.
Signed-off-by: Denis Efremov <efremov@linux.com>
---
scripts/coccinelle/misc/unlikely.cocci | 70 ++++++++++++++++++++++++++
1 file changed, 70 insertions(+)
create mode 100644 scripts/coccinelle/misc/unlikely.cocci
diff --git a/scripts/coccinelle/misc/unlikely.cocci b/scripts/coccinelle/misc/unlikely.cocci
new file mode 100644
index 000000000000..88278295d76a
--- /dev/null
+++ b/scripts/coccinelle/misc/unlikely.cocci
@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/// Use unlikely instead of !likely and likely instead of !unlikely.
+///
+// Confidence: High
+// Copyright: (C) 2019 Denis Efremov, ISPRAS.
+// Options: --include-headers
+
+virtual patch
+virtual context
+virtual org
+virtual report
+
+//----------------------------------------------------------
+// For context mode
+//----------------------------------------------------------
+
+@depends on context disable unlikely@
+expression E;
+@@
+
+(
+* !likely(E)
+|
+* !unlikely(E)
+)
+
+//----------------------------------------------------------
+// For patch mode
+//----------------------------------------------------------
+
+@depends on patch disable unlikely@
+expression E;
+@@
+
+(
+-!likely(E)
++unlikely(E)
+|
+-!unlikely(E)
++likely(E)
+)
+
+//----------------------------------------------------------
+// For org and report mode
+//----------------------------------------------------------
+
+@r depends on (org || report) disable unlikely@
+expression E;
+position p;
+@@
+
+(
+ !likely@p(E)
+|
+ !unlikely@p(E)
+)
+
+@script:python depends on org@
+p << r.p;
+@@
+
+coccilib.org.print_todo(p[0], "WARNING use unlikely instead of !likely")
+
+@script:python depends on report@
+p << r.p;
+@@
+
+msg="WARNING: Use unlikely instead of !likely"
+coccilib.report.print_report(p[0], msg)
+
--
2.21.0
next reply other threads:[~2019-08-25 13:05 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-25 13:05 Denis Efremov [this message]
2019-08-25 15:30 ` [PATCH] scripts: coccinelle: check for !(un)?likely usage Markus Elfring
2019-08-25 21:06 ` Denis Efremov
2019-08-25 15:30 ` Markus Elfring
2019-08-25 16:37 ` Joe Perches
2019-08-25 18:59 ` Denis Efremov
2019-08-25 19:19 ` Julia Lawall
2019-08-28 11:33 ` Rasmus Villemoes
2019-08-28 11:59 ` Joe Perches
2019-08-28 12:33 ` Denis Efremov
2019-08-28 13:05 ` Rasmus Villemoes
2019-08-28 13:14 ` Denis Efremov
2019-08-28 12:33 ` Julia Lawall
2019-08-28 12:41 ` Denis Efremov
2019-08-28 13:57 ` Denis Efremov
2019-08-25 21:19 ` Denis Efremov
2019-09-01 17:24 ` Pavel Machek
2019-09-01 17:39 ` Denis Efremov
2019-08-29 17:10 ` [PATCH v2] " Denis Efremov
2019-08-29 17:13 ` Denis Efremov
2019-08-30 0:42 ` Julia Lawall
2019-08-30 6:56 ` Denis Efremov
2019-08-30 8:06 ` Rasmus Villemoes
2019-08-29 20:07 ` Markus Elfring
2019-08-30 7:55 ` Markus Elfring
2019-09-06 20:19 ` Julia Lawall
2019-09-06 20:55 ` Denis Efremov
2019-09-07 8:05 ` [v2] " Markus Elfring
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