[PATCH 1/5] Addition of a semantic patch file for showing unnecessary checks before a few known functions

[Markus Elfring]

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 <elfring@xxxxxxxxxxxxxxxxxxxxx>
---
 .../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


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