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Date: Sun, 19 Aug 2007 20:07:32 +0100
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH] optimize dmapi event tests w/o dmapi config
Message-ID: <20070819190732.GA2929@infradead.org>
References: <46C7DD96.6030001@sandeen.net>
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To: Eric Sandeen <sandeen@sandeen.net>
Cc: xfs-oss <xfs@oss.sgi.com>

On Sun, Aug 19, 2007 at 01:05:10AM -0500, Eric Sandeen wrote:
> Defining XFS_DM_EVENT* macros to 0 in the absence of 
> CONFIG_XFS_DMAPI allows gcc to optimize away tests that 
> should never be true. Also wrap one hunk of xfs_unmount 
> in #ifdef CONFIG_XFS_DMAPI

Sounds useful, especially as dmapi is not in mainline at all.