netdev - Re: [PATCH 02/23] usb-gadget: use per-attribute show and store methods

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Date:	Mon, 28 Sep 2015 15:35:14 +0200
From:	Christoph Hellwig <hch@....de>
To:	Felipe Balbi <balbi@...com>
Cc:	Christoph Hellwig <hch@....de>, Joel Becker <jlbec@...lplan.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Tejun Heo <tj@...nel.org>,
	Pratyush Anand <pratyush.anand@...il.com>,
	target-devel@...r.kernel.org, cluster-devel@...hat.com,
	ocfs2-devel@....oracle.com, linux-usb@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH 02/23] usb-gadget: use per-attribute show and store
	methods

On Sun, Sep 27, 2015 at 10:50:53AM -0500, Felipe Balbi wrote:
> this (and the other helper below) could be macros just fine.

They could, but they shouldn't.  Inlines are always preferable over
function-like macros.

> Are you 100% compiler
> will *always* inline these helpers.

With gcc you can't ever be sure - but if it doesn't inline a trivial
pointer arithmetic we'll see breakage in various other places, including
the file system fast path which uses this pattern all over.
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