linux-kernel - RE: [PATCH v2 4/6] ath6kl: get rid of AR_DBG_LVL

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Date:	Thu, 5 Jan 2012 14:14:30 -0000
From:	"David Laight" <David.Laight@...LAB.COM>
To:	"Kalle Valo" <kvalo@....qualcomm.com>, <linville@...driver.com>
Cc:	<sfr@...b.auug.org.au>, <netdev@...r.kernel.org>,
	<linux-wireless@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-next@...r.kernel.org>, <ath6kl-devel@...lcomm.com>,
	<davem@...emloft.net>
Subject: RE: [PATCH v2 4/6] ath6kl: get rid of AR_DBG_LVL_CHECK()

 
> We don't need it as debug calls already have a log level and compiler
> should be smart enough to optimise away the code when ath6kl 
> debug code is not enabled.

Have you checked?
I think you are assuming that because the called
function collapses, the call will be removed allowing
the loop to be removed.
I suspect this is only true if the function is inlined.
IIRC the normal linkage rules mean that only static
functions are candidates for inlining.

	David


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