From mboxrd@z Thu Jan 1 00:00:00 1970 From: SF Markus Elfring Date: Wed, 05 Mar 2014 22:48:07 +0000 Subject: Re: [coccicheck Linux 3.14-rc5 PATCH 1 of 5] Deletion of unnecessary checks before specific function Message-Id: <5317A9A7.8080405@users.sourceforge.net> List-Id: References: <5307CAA2.8060406@users.sourceforge.net> <530A086E.8010901@users.sourceforge.net> <530A72AA.3000601@users.sourceforge.net> <530B5FB6.6010207@users.sourceforge.net> <530C5E18.1020800@users.sourceforge.net> <530CD2C4.4050903@users.sourceforge.net> <530CF8FF.8080600@users.sourceforge.net> <530DD06F.4090703@users.sourceforge.net> <5317A59D.4@users.sourceforge.net> In-Reply-To: <5317A59D.4@users.sourceforge.net> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: cocci@systeme.lip6.fr >> If you are convinced that dropping the null tests is a good idea, then you >> can submit the patch that makes the change to the relevant maintainers and >> mailing lists. >From 48c9c4f61a7d7ea98538e02631a981a429281005 Mon Sep 17 00:00:00 2001 From: Markus Elfring Date: Wed, 5 Mar 2014 18:15:34 +0100 Subject: [PATCH 1/5] Addition of a semantic patch file for showing unnecessary checks before a few known functions This semantic patch pattern tries to find source code places where a check is performed for an expression that is passed to a function (like "kfree") which checks this single parameter itself for usability. Redundant value or pointer checks can be avoided here. The pattern contains a special comment in a regular expression for a SmPL constraint which supports extensions. Signed-off-by: Markus Elfring --- .../deletions/delete_unnecessary_checks_template1.cocci | 13 +++++++++++++ 1 file changed, 13 insertions(+) create mode 100644 scripts/coccinelle/deletions/delete_unnecessary_checks_template1.cocci diff --git a/scripts/coccinelle/deletions/delete_unnecessary_checks_template1.cocci b/scripts/coccinelle/deletions/delete_unnecessary_checks_template1.cocci new file mode 100644 index 0000000..b092051 --- /dev/null +++ b/scripts/coccinelle/deletions/delete_unnecessary_checks_template1.cocci @@ -0,0 +1,13 @@ +@Delete_unnecessary_checks@ +expression x; +identifier release =~ "^(?x) +(?: + (?:kz?|slob_)free +| + (?: +# Alternation placeholder + ) +)$"; +@@ +-if (x) + release(x); -- 1.9.0