linux-kernel - [PATCH] scripts/coccinelle: check for redeclaration

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Date:   Fri, 28 Dec 2018 15:49:01 +0100
From:   Julia Lawall <Julia.Lawall@...6.fr>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     kernel-janitors@...r.kernel.org,
        Gilles Muller <Gilles.Muller@...6.fr>,
        Nicolas Palix <nicolas.palix@...g.fr>,
        Michal Marek <michal.lkml@...kovi.net>, cocci@...teme.lip6.fr,
        linux-kernel@...r.kernel.org,
        "Jason A . Donenfeld" <zx2c4@...nel.org>
Subject: [PATCH] scripts/coccinelle: check for redeclaration

Avoid reporting on the use of an iterator index variable when
the variable is redeclared.

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

---
 scripts/coccinelle/iterators/use_after_iter.cocci |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/scripts/coccinelle/iterators/use_after_iter.cocci b/scripts/coccinelle/iterators/use_after_iter.cocci
index ce8cc9c..66a1140 100644
--- a/scripts/coccinelle/iterators/use_after_iter.cocci
+++ b/scripts/coccinelle/iterators/use_after_iter.cocci
@@ -35,6 +35,7 @@ iterator name hlist_for_each_entry_from;
 iterator name hlist_for_each_entry_safe;
 statement S;
 position p1,p2;
+type T;
 @@
 
 (
@@ -125,6 +126,8 @@ sizeof(<+...c...+>)
 |
  &c->member
 |
+T c;
+|
 c = E
 |
 *c@p2