linux-kernel - [PATCH 1/3 RFC] Coccinelle: drop unecessary duplicated init

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Date:	Fri,  2 Jan 2015 04:59:10 -0500
From:	Nicholas Mc Guire <der.herr@...r.at>
To:	Julia Lawall <Julia.Lawall@...6.fr>
Cc:	Gilles Muller <Gilles.Muller@...6.fr>,
	Nicolas Palix <nicolas.palix@...g.fr>,
	Michal Marek <mmarek@...e.cz>,
	Andreas Platschek <platschek@....tuwien.ac.at>,
	cocci@...teme.lip6.fr, linux-kernel@...r.kernel.org,
	Nicholas Mc Guire <der.herr@...r.at>
Subject: [PATCH 1/3 RFC] Coccinelle: drop unecessary duplicated init_compltion calls

Reviewed-by: Andreas Platschek <platschek@....tuwien.ac.at>
Signed-off-by: Nicholas Mc Guire <der.herr@...r.at>
---
 .../coccinelle/api/duplicate_init_completion.cocci |   59 ++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 scripts/coccinelle/api/duplicate_init_completion.cocci

diff --git a/scripts/coccinelle/api/duplicate_init_completion.cocci b/scripts/coccinelle/api/duplicate_init_completion.cocci
new file mode 100644
index 0000000..889715a
--- /dev/null
+++ b/scripts/coccinelle/api/duplicate_init_completion.cocci
@@ -0,0 +1,59 @@
+/* drop unnecessary duplicated init_compltion calls
+ * in patch mode one must be check that it is actually
+ * the second init_completion that can be removed and not
+ * the first.
+ * Options: --no-includes --include-headers
+ */
+virtual context
+virtual patch
+virtual org
+virtual report
+
+/* mark first call to init_completion */
+@c@
+expression cmp;
+position p;
+@@
+
+ init_completion@p(cmp)
+
+/* flag duplicate initializations */
+@d depends on patch && !(context || org || report)@
+expression E,c.cmp;
+identifier f;
+position c.p,p1;
+@@
+
+  init_completion@p(cmp)
+  ... when != E = cmp
+      when != E = &cmp
+      when != f(..., cmp, ...)
+      when != f(..., &cmp, ...)
+- init_completion@p1(cmp);
+
+@dp depends on !patch && (context || org || report)@
+identifier f;
+expression E,c.cmp;
+position c.p,p1;
+@@
+
+  init_completion@p(cmp)
+  ... when != E = cmp
+      when != E = &cmp
+      when != f(..., cmp, ...)
+      when != f(..., &cmp, ...)
+  init_completion@p1(cmp);
+
+@...ipt:python depends on org@
+p << dp.p1;
+@@
+
+msg="WARNING: possible duplicate init_completion"
+coccilib.org.print_todo(p[0], msg)
+
+@...ipt:python depends on report@
+p << dp.p1;
+@@
+
+msg="WARNING: possible duplicate init_completion"
+coccilib.report.print_report(p[0], msg)
-- 
1.7.10.4

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