linux-kernel - Re: Checkpatch.pl generates false alarm

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Date:	Mon, 11 Jul 2011 21:23:26 -0700
From:	Joe Perches <joe@...ches.com>
To:	Roland Vossen <rvossen@...adcom.com>
Cc:	apw@...onical.com,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Checkpatch.pl generates false alarm

On Mon, 2011-07-11 at 16:48 +0200, Roland Vossen wrote:
> Hello Andy,
> 
> when I feed attached file to checkpatch, several warnings are given, but 
> this one:
> 
> WARNING: externs should be avoided in .c files
> #3555: FILE: staging/brcm80211/brcmsmac/main.c:3555:
> +       END_FOREACH_BSS
> 
> does not seem to make sense. When I place a comment behind the 
> END_FOREACH_BSS line, the checkpatch warning disappears.
> 
> Let me know if you need additional info to work on this.

I think this code is bad form and confuses checkpatch:

	/* update the capability based on current shortslot mode */
	FOREACH_BSS(wlc, idx, cfg)
		if (!cfg->associated)
			continue;
		cfg->current_bss->capability &=
					~WLAN_CAPABILITY_SHORT_SLOT_TIME;
		if (wlc->shortslot)
			cfg->current_bss->capability |=
					WLAN_CAPABILITY_SHORT_SLOT_TIME;
	END_FOREACH_BSS

I think this code is still slightly bad form, but it isn't a problem
for checkpatch:

	/* update the capability based on current shortslot mode */
	FOREACH_BSS(wlc, idx, cfg) {
		if (!cfg->associated)
			continue;
		cfg->current_bss->capability &=
					~WLAN_CAPABILITY_SHORT_SLOT_TIME;
		if (wlc->shortslot)
			cfg->current_bss->capability |=
					WLAN_CAPABILITY_SHORT_SLOT_TIME;
	} END_FOREACH_BSS


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