+ scripts-a-new-script-for-checking-duplicate-struct-declaration.patch added to -mm tree

+ scripts-a-new-script-for-checking-duplicate-struct-declaration.patch added to -mm tree

[akpm]

The patch titled
     Subject: scripts: a new script for checking duplicate struct declaration
has been added to the -mm tree.  Its filename is
     scripts-a-new-script-for-checking-duplicate-struct-declaration.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/scripts-a-new-script-for-checking-duplicate-struct-declaration.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/scripts-a-new-script-for-checking-duplicate-struct-declaration.patch

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------------------------------------------------------
From: Wan Jiabing <wanjiabing@vivo.com>
Subject: scripts: a new script for checking duplicate struct declaration

checkdeclares: find struct declared more than once.  Inspired by
checkincludes.pl.

This script checks for duplicate struct declares.  Note that this will not
take into consideration macros, so you should run this only if you know
you do have real dups and do not have them under #ifdef's.  You could also
just review the results.

Link: https://lkml.kernel.org/r/20210401110943.1010796-1-wanjiabing@vivo.com
Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 scripts/checkdeclares.pl |   53 +++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

--- /dev/null
+++ a/scripts/checkdeclares.pl
@@ -0,0 +1,53 @@
+#!/usr/bin/env perl
+# SPDX-License-Identifier: GPL-2.0
+#
+# checkdeclares: find struct declared more than once
+#
+# Copyright 2021 Wan Jiabing<wanjiabing@vivo.com>
+# Inspired by checkincludes.pl
+#
+# This script checks for duplicate struct declares.
+# Note that this will not take into consideration macros so
+# you should run this only if you know you do have real dups
+# and do not have them under #ifdef's.
+# You could also just review the results.
+
+use strict;
+
+sub usage {
+	print "Usage: checkdeclares.pl \n";
+	print "We just warn of struct declaration duplicates\n";
+	exit 1;
+}
+
+if ($#ARGV < 0) {
+	usage();
+}
+
+my $dup_counter = 0;
+
+foreach my $file (@ARGV) {
+	open(my $f, '<', $file)
+	    or die "Cannot open $file: $!.\n";
+
+	my %declaredstructs = ();
+
+	while (<$f>) {
+		if (m/^\s*struct\s*(\w*);$/o) {
+			++$declaredstructs{$1};
+		}
+	}
+
+	close($f);
+
+	foreach my $structname (keys %declaredstructs) {
+		if ($declaredstructs{$structname} > 1) {
+			print "$file: struct $structname is declared more than once.\n";
+			++$dup_counter;
+		}
+	}
+}
+
+if ($dup_counter == 0) {
+	print "No duplicate struct declares found.\n";
+}
_

Patches currently in -mm which might be from wanjiabing@vivo.com are

scripts-a-new-script-for-checking-duplicate-struct-declaration.patch
linux-memcontrolh-remove-duplicate-struct-declaration.patch