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authorPeter Senna Tschudin <peter.senna@gmail.com>2012-12-08 21:34:34 +0400
committerMichal Marek <mmarek@suse.cz>2013-01-24 15:10:38 +0400
commit7320bfa7cfe31e9ee95a40ab8e52648066284141 (patch)
tree6ecc0024f3b07746848ddfe5dbfdd7299bbace49
parent9f14b4201239a9779d52bdd6137583d452b38ec3 (diff)
downloadlinux-7320bfa7cfe31e9ee95a40ab8e52648066284141.tar.xz
scripts/coccinelle/misc/semicolon.cocci: Add unneeded semicolon test
This semantic patch looks for semicolons that can be removed without changing the semantics of the code. The confidence is moderate because there are some false positives on cases like: b/drivers/mmc/host/cb710-mmc.c:589 break; case MMC_POWER_UP: default: - /* ignore */; } There are 37 patches accepted reported by this semantic patch and more than 300 fixes to be applied. Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
-rw-r--r--scripts/coccinelle/misc/semicolon.cocci83
1 files changed, 83 insertions, 0 deletions
diff --git a/scripts/coccinelle/misc/semicolon.cocci b/scripts/coccinelle/misc/semicolon.cocci
new file mode 100644
index 000000000000..a47eba2edc9e
--- /dev/null
+++ b/scripts/coccinelle/misc/semicolon.cocci
@@ -0,0 +1,83 @@
+///
+/// Removes unneeded semicolon.
+///
+// Confidence: Moderate
+// Copyright: (C) 2012 Peter Senna Tschudin, INRIA/LIP6. GPLv2.
+// URL: http://coccinelle.lip6.fr/
+// Comments: Some false positives on empty default cases in switch statements.
+// Options: --no-includes --include-headers
+
+virtual patch
+virtual report
+virtual context
+virtual org
+
+@r_default@
+position p;
+@@
+switch (...)
+{
+default: ...;@p
+}
+
+@r_case@
+position p;
+@@
+(
+switch (...)
+{
+case ...:;@p
+}
+|
+switch (...)
+{
+case ...:...
+case ...:;@p
+}
+|
+switch (...)
+{
+case ...:...
+case ...:
+case ...:;@p
+}
+)
+
+@r1@
+statement S;
+position p1;
+position p != {r_default.p, r_case.p};
+identifier label;
+@@
+(
+label:;
+|
+S@p1;@p
+)
+
+@script:python@
+p << r1.p;
+p1 << r1.p1;
+@@
+if p[0].line != p1[0].line_end:
+ cocci.include_match(False)
+
+@depends on patch@
+position r1.p;
+@@
+-;@p
+
+@script:python depends on report@
+p << r1.p;
+@@
+coccilib.report.print_report(p[0],"Unneeded semicolon")
+
+@depends on context@
+position r1.p;
+@@
+*;@p
+
+@script:python depends on org@
+p << r1.p;
+@@
+cocci.print_main("Unneeded semicolon",p)