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Re: [PATCH] Clean up sparse warnings

To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: [PATCH] Clean up sparse warnings
From: David Chinner <dgc@xxxxxxx>
Date: Wed, 31 Oct 2007 10:03:20 +1100
Cc: David Chinner <dgc@xxxxxxx>, xfs@xxxxxxxxxxx, xfs-dev@xxxxxxx
In-reply-to: <20071030100523.GA23489@xxxxxxxxxxxxx>
References: <20071029233442.GP995458@xxxxxxx> <20071030100523.GA23489@xxxxxxxxxxxxx>
Sender: xfs-bounce@xxxxxxxxxxx
User-agent: Mutt/1.4.2.1i
On Tue, Oct 30, 2007 at 10:05:23AM +0000, Christoph Hellwig wrote:
> On Tue, Oct 30, 2007 at 10:34:42AM +1100, David Chinner wrote:
> > 
> > Clean up most outstanding sparse warnings.
> > 
> > These are mostly locking annotations, marking things static,
> > casts where needed and declaring stuff in header files.
> 
> Nice.  Note that once we start on making things static there's also a lot
> of things not really used non-static but exported which we should cleanup
> aswell.  I'll look at that when I get some time.
> 
> Note that we'll also always get tons of sparse warnings for debug builds
> because STATIC is defined away..

Yeah, I noticed that - but given that we've done that on purpose to
aid debugging, I don't think it will change ;)

> > @@ -2733,21 +2733,13 @@ xlog_recover_do_efd_trans(
> >                              * AIL lock.
> >                              */
> >                             xfs_trans_delete_ail(mp, lip);
> > -                           break;
> > +                           xfs_efi_item_free(efip);
> > +                           return;
> >                     }
> >             }
> >             lip = xfs_trans_next_ail(mp, lip, &gen, NULL);
> >     }
> > -
> > -   /*
> > -    * If we found it, then free it up.  If it wasn't there, it
> > -    * must have been overwritten in the log.  Oh well.
> > -    */
> > -   if (lip != NULL) {
> > -           xfs_efi_item_free(efip);
> > -   } else {
> > -           spin_unlock(&mp->m_ail_lock);
> > -   }
> > +   spin_unlock(&mp->m_ail_lock);
> 
> Imho non-trivial changes like this hunk always deserve beeing a patch of
> it's own where they're described in details.

Ok, I'll split that one out.

> Note that I also get warnings from the lock annotations prover in sparse
> about some conditional locking in xfs_mount.c.  I have patches I still need
> to run through testing for those which clean the code up quite nicely aswell.

Oh, yeah, I left a couple in the icsb code alone as they'd require more than
trivial annotation to fix. I just wanted to remove the majority of the
noise so I could see new problems easily. Patches to fix them would be great
;)

Cheers,

Dave.
-- 
Dave Chinner
Principal Engineer
SGI Australian Software Group


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