linux-kernel - Re: False positive EXPORT_SYMBOL warning with NS variants

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Date:   Sat, 04 Sep 2021 22:51:01 -0700
From:   Joe Perches <joe@...ches.com>
To:     Ian Pilcher <arequipeno@...il.com>,
        Andy Whitcroft <apw@...onical.com>
Cc:     Dwaipayan Ray <dwaipayanray1@...il.com>,
        Lukas Bulwahn <lukas.bulwahn@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: False positive EXPORT_SYMBOL warning with NS variants

On Fri, 2021-09-03 at 11:01 -0500, Ian Pilcher wrote:
> $ cat foo.c
> // SPDX-License-Identifier: GPL-2.0-only
> void (*foo)(void);
> EXPORT_SYMBOL_NS(foo, FOO);
> 
> $ scripts/checkpatch.pl -f foo.c
> WARNING: EXPORT_SYMBOL(foo); should immediately follow its function/variable
> #3: FILE: foo.c:3:
> +EXPORT_SYMBOL_NS(foo, FOO);
> 
> The non-NS EXPORT_SYMBOL variants don't trigger this warning.
> 

Try this:
---
 scripts/checkpatch.pl | 1 +
 1 file changed, 1 insertion(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 88cb294dc4472..91798b07c6cb5 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -4449,6 +4449,7 @@ sub process {
 			#   XXX(foo);
 			#   EXPORT_SYMBOL(something_foo);
 			my $name = $1;
+			$name =~ s/^\s*($Ident).*/$1/;
 			if ($stat =~ /^(?:.\s*}\s*\n)?.([A-Z_]+)\s*\(\s*($Ident)/ &&
 			    $name =~ /^${Ident}_$2/) {
 #print "FOO C name<$name>\n";