linux-kernel - Re: GCOV_PROFILE_ALL breaks BUILD_BUG_ON(!is_power_of

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Message-ID: <1439543147.2091.11.camel@sipsolutions.net>
Date:	Fri, 14 Aug 2015 11:05:47 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	Michal Kubecek <mkubecek@...e.cz>
Cc:	linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: GCOV_PROFILE_ALL breaks BUILD_BUG_ON(!is_power_of_2(8))

On Fri, 2015-08-14 at 11:00 +0200, Michal Kubecek wrote:

> > but should I have expected this?
> 
> It might have something to do with the fact that is_power_of_2() 
> being an inline function, perhaps with this compiler option it 
> translates to something that can't be used in the context 
> BUILD_BUG_ON() uses it in.

Evidently, yeah.

> There is a BUILD_BUG_ON_NOT_POWER_OF_2() macro you could use.
> 

Good point, I'll do that, thanks.

johannes
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