Re: [qemu-s390x] [PATCH 02/17] block: Pass local error object pointer to error_append_hint()

[Kevin Wolf]

Am 17.09.2019 um 16:39 hat Eric Blake geschrieben:
> On 9/17/19 5:20 AM, Greg Kurz wrote:
> > Ensure that hints are added even if errp is &error_fatal or &error_abort.
> > 
> > Signed-off-by: Greg Kurz <address@hidden>
> > ---
> >  block/backup.c       |    7 +++++--
> >  block/dirty-bitmap.c |    7 +++++--
> >  block/file-posix.c   |   20 +++++++++++++-------
> >  block/gluster.c      |   23 +++++++++++++++--------
> >  block/qcow.c         |   10 ++++++----
> >  block/qcow2.c        |    7 +++++--
> >  block/vhdx-log.c     |    7 +++++--
> >  block/vpc.c          |    7 +++++--
> >  8 files changed, 59 insertions(+), 29 deletions(-)
> > 
> > diff --git a/block/backup.c b/block/backup.c
> > index 763f0d7ff6db..d8c422a0e3bc 100644
> > --- a/block/backup.c
> > +++ b/block/backup.c
> > @@ -602,11 +602,14 @@ static int64_t 
> > backup_calculate_cluster_size(BlockDriverState *target,
> >                      BACKUP_CLUSTER_SIZE_DEFAULT);
> >          return BACKUP_CLUSTER_SIZE_DEFAULT;
> >      } else if (ret < 0 && !target->backing) {
> > -        error_setg_errno(errp, -ret,
> > +        Error *local_err = NULL;
> 
> Can we go with the shorter name 'err' instead of 'local_err'?  I know,
> we aren't consistent (both styles appear throughout the tree), but the
> shorter style is more appealing to me.

I like local_err better because it's easier to distinguish from errp.
The compiler might catch it if you use the wrong one because one is
Error* and the other is Error**, but as a reviewer, I can still get
confused.

Kevin