linux-kernel - Re: [PATCH 1/9] exofs: osd Swiss army knife

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Date:	Fri, 2 Jan 2009 17:52:03 +0100
From:	Pavel Machek <pavel@...e.cz>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Boaz Harrosh <bharrosh@...asas.com>, avishay@...il.com,
	jeff@...zik.org, viro@...IV.linux.org.uk,
	linux-fsdevel@...r.kernel.org, osd-dev@...n-osd.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/9] exofs: osd Swiss army knife

Hi!

> > In this patch are all the osd infrastructure that will be used later
> > by the file system.
> > 
> > Also the declarations of constants, on disk structures, and prototypes.
> > 
> > And the Kbuild+Kconfig files needed to build the exofs module.
> > 
> >
> > ...
> >
> > +struct exofs_sb_info {
> > +	struct osd_dev	*s_dev;			/* returned by get_osd_dev    */
> > +	uint64_t	s_pid;			/* partition ID of file system*/
> > +	int		s_timeout;		/* timeout for OSD operations */
> > +	uint32_t	s_nextid;		/* highest object ID used     */
> > +	uint32_t	s_numfiles;		/* number of files on fs      */
> > +	spinlock_t	s_next_gen_lock;	/* spinlock for gen # update  */
> > +	u32		s_next_generation;	/* next gen # to use          */
> > +	atomic_t	s_curr_pending;		/* number of pending commands */
> > +	uint8_t		s_cred[OSD_CAP_LEN];	/* all-powerful credential    */
> > +};
> > +
> > +/*
> > + * our inode flags
> > + */
> > +#ifdef ARCH_HAS_ATOMIC_UNSIGNED
> 
> This doesn't exist, and it would be fairly bad to introduce it.  Please
> kill the ifdefs.
> 
> > +typedef unsigned exofs_iflags_t;
> > +#else
> > +typedef unsigned long exofs_iflags_t;
> > +#endif
> 
> Then please kill the typedef altogether and replace it with `unsigned
> long' everywhere

Hmmm.. .and at a note somewhere that we assume unsigned long to be atomic...?

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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