Re: [Xen-devel] [PATCH 2/2] xen-blkfront: implement safe version of llist_for_each_entry

[Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>]

On Mon, 10 Dec 2012 18:05:23 +0100
Roger Pau Monné <roger.pau@xxxxxxxxxx> wrote:

> On 10/12/12 16:15, Konrad Rzeszutek Wilk wrote:
> > On Mon, Dec 10, 2012 at 01:15:50PM +0100, Roger Pau Monné wrote:
> >> On 07/12/12 21:20, Konrad Rzeszutek Wilk wrote:
> >>> On Tue, Dec 04, 2012 at 03:21:53PM +0100, Roger Pau Monne wrote:
> >>>> Implement a safe version of llist_for_each_entry, and use it in
> >>>> blkif_free. Previously grants where freed while iterating the list,
> >>>> which lead to dereferences when trying to fetch the next item.
> >>>
> >>> Looks like xen-blkfront is the only user of this llist_for_each_entry.
> >>>
> >>> Would it be more prudent to put the macro in the llist.h file?
> >>
> >> I'm not able to find out who is the maintainer of llist, should I just
> >> CC it's author?
> > 
> > Sure. I CC-ed akpm here to solicit his input as well. Either way I am
> > OK wit this being in xen-blkfront but it just seems that it could
> > be useful in the llist file since that is where the non-safe version
> > resides.
> 
> I'm going to resend this series with llist_for_each_entry_safe added to
> llist.h in a separated patch. I wouldn't like to delay this series
> because we cannot get llist_for_each_entry_safe added to llist.h, that's
> why I've added it to blkfront in the first place.

Please include that llist.h patch within the xen merge.  It's just a single
hunk and won't cause any disruption.

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