linux-kernel - Re: checkpatch false positon on EXPORT

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Message-ID: <1459452096.1744.12.camel@perches.com>
Date:	Thu, 31 Mar 2016 12:21:36 -0700
From:	Joe Perches <joe@...ches.com>
To:	Daniel Walker <danielwa@...co.com>,
	Andy Whitcroft <apw@...onical.com>,
	open list <linux-kernel@...r.kernel.org>,
	Daniel Walker <dwalker@...o99.com>,
	"xe-kernel@...ernal.cisco.com" <xe-kernel@...ernal.cisco.com>
Subject: Re: checkpatch false positon on EXPORT_SYMBOL

On Thu, 2016-03-31 at 08:01 -0700, Daniel Walker wrote:
> The below looks like normal code but the last export symbol gets the 
> warning,
> 
> 
> WARNING:EXPORT_SYMBOL: EXPORT_SYMBOL(foo); should immediately follw its 
> function/variable
> #16: FILE: kernel/acct.c:70:
> +EXPORT_SYMBOL(test_export);    /* Error ! */
> 
> It seems to have to do with the comments at the end of the line. The 
> first two examples don't have warnings because I removed the comments on 
> different lines. comments on the variable and export symbol lines gets 
> the error tho.

That looks like a false positive I'll leave for Andy.

$ cat ~/export_symbol.c
int test_export_no_comment;
EXPORT_SYMBOL(test_export_no_comment);
int test_export_comment_int;		/* comment int */
EXPORT_SYMBOL(test_export_int);
int test_export_comment_symbol;
EXPORT_SYMBOL(test_export_symbol);	/* comment symbol */
int test_export_both;			/* comment both 1 */
EXPORT_SYMBOL(test_export_both);	/* comment both 2 */
$

Something's a bit off with the $stat variable:

test_export_int doesn't match the EXPORT_SYMBOL test.
test_export_symbol and test_export_both get warnings.