linux-kernel - [PATCH v2 1/8] Coccinelle: atomic_as_refcounter: Delete an unnecessary SmPL rule

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Date:   Mon, 16 Jul 2018 19:24:35 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     kernel-janitors@...r.kernel.org,
        Elena Reshetova <elena.reshetova@...el.com>,
        Julia Lawall <julia.lawall@...6.fr>,
        Kees Cook <keescook@...omium.org>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Coccinelle <cocci@...teme.lip6.fr>,
        Gilles Muller <Gilles.Muller@...6.fr>,
        Michal Marek <michal.lkml@...kovi.net>,
        Nicolas Palix <nicolas.palix@...g.fr>
Subject: [PATCH v2 1/8] Coccinelle: atomic_as_refcounter: Delete an
 unnecessary SmPL rule

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Mon, 16 Jul 2018 17:15:26 +0200

A search was specified in the rule “r4” for function calls which should be
found by the rule “r1” already in a script for the semantic patch language.
It is useless to repeat a source code search there just to determine
that a variable assignment was performed also for an input parameter
of such a function call (while the same message will be displayed so far).
Thus delete an inappropriate search specification.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 .../coccinelle/api/atomic_as_refcounter.cocci | 33 -------------------
 1 file changed, 33 deletions(-)

diff --git a/scripts/coccinelle/api/atomic_as_refcounter.cocci b/scripts/coccinelle/api/atomic_as_refcounter.cocci
index 988120e0fd67..61fcaf5e45a3 100644
--- a/scripts/coccinelle/api/atomic_as_refcounter.cocci
+++ b/scripts/coccinelle/api/atomic_as_refcounter.cocci
@@ -57,39 +57,6 @@ p2 << r1.p2;
 msg = "atomic_dec_and_test variation before object free at line %s."
 coccilib.report.print_report(p1[0], msg % (p2[0].line))
 
-@r4 exists@
-identifier a, x, y;
-position p1, p2;
-identifier fname =~ ".*free.*";
-
-@@
-
-(
- atomic_dec_and_test@p1(&(a)->x)
-|
- atomic_dec_and_lock@p1(&(a)->x, ...)
-|
- atomic_long_dec_and_lock@p1(&(a)->x, ...)
-|
- atomic_long_dec_and_test@p1(&(a)->x)
-|
- atomic64_dec_and_test@p1(&(a)->x)
-|
- local_dec_and_test@p1(&(a)->x)
-)
-...
-y=a
-...
-fname@p2(y, ...);
-
-
-@...ipt:python depends on report@
-p1 << r4.p1;
-p2 << r4.p2;
-@@
-msg = "atomic_dec_and_test variation before object free at line %s."
-coccilib.report.print_report(p1[0], msg % (p2[0].line))
-
 @r2 exists@
 identifier a, x;
 position p1;
-- 
2.18.0