linux-kernel - Re: [PATCH 2/3] fsstack: Generic get/set lower object functions

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Date:	Fri, 3 Nov 2006 17:36:03 +0100 (MET)
From:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
To:	Pekka Enberg <penberg@...helsinki.fi>
cc:	Trond Myklebust <trond.myklebust@....uio.no>,
	Josef Sipek <jsipek@....cs.sunysb.edu>,
	Mark Williamson <mark.williamson@...cam.ac.uk>,
	linux-kernel@...r.kernel.org,
	Michael Halcrow <mhalcrow@...ibm.com>,
	Erez Zadok <ezk@...sunysb.edu>,
	Christoph Hellwig <hch@...radead.org>,
	Al Viro <viro@....linux.org.uk>, Andrew Morton <akpm@...l.org>,
	linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 2/3] fsstack: Generic get/set lower object functions


>> Why? What is so special about the details that you need to hide them?
>> This is a union that will always be part of a structure anyway.
>
> Nothing. Josef, I think we should make them unions.

In other words,

/* structs to maintain pointers to the lower VFS objects */
struct fsstack_sb_info {
	union {
		struct super_block *sb;
		struct super_block **sbs;
	};                                                                      
};                                                                         

should become:

union fsstack_sb_info {
	struct super_block *sb;
	struct super_block **sbs;
};


	-`J'
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