Re: [PATCH v3 2/4] objtool: Move orc outside of check

[Julien Thierry]

On 7/31/20 8:56 AM, Miroslav Benes wrote:
> On Thu, 30 Jul 2020, Julien Thierry wrote:
>
> > On 7/30/20 3:15 PM, Josh Poimboeuf wrote:
> > > On Thu, Jul 30, 2020 at 02:29:20PM +0100, Julien Thierry wrote:
> > > > On 7/30/20 2:22 PM, peterz@xxxxxxxxxxxxx wrote:
> > > > > On Thu, Jul 30, 2020 at 01:40:42PM +0100, Julien Thierry wrote:
> > > > > > On 7/30/20 10:57 AM, peterz@xxxxxxxxxxxxx wrote:
> > > > > > > On Thu, Jul 30, 2020 at 10:41:41AM +0100, Julien Thierry wrote:
> > > > > > > > +		if (file->elf->changed)
> > > > > > > > +			return elf_write(file->elf);
> > > > > > > > +		else
> > > > > > > > +			return 0;
> > > > > > > >       }
> > > > > > >
> > > > > > > I think we can do without that else :-)
> > > > > >
> > > > > > I did wonder and was not 100% confident about it, but the orc gen will
> > > > > > always change the file, correct?
> > > > >
> > > > > Not if it already has orc, iirc.
> > > > >
> > > > > But what I was trying to say is that:
> > > > >
> > > > >   if (file->elf->changed)
> > > > >    return elf_write(file->elf)
> > > > >
> > > > >   return 0;
> > > > >
> > > > > is identical code and, IMO, easier to read.
> > > >
> > > > Much easier yes, I'll change it.
> > >
> > > But I think file->elf->changed can be assumed at this point anyway, so
> > > it could just be an unconditional
> > >
> > >   return elf_write(file->elf);
> >
> > I'll triple check whether that's the case and remove the if if possible.
>
> I think it is the case. And even if not, it would only cause a pointless
> call to elf_update() in the end and that should not do any harm anyway if
> I am not mistaken.
>
> However, I think there is a problem with the rebase on top of the current
> code. The patch moves elf_write() call to orc_gen.c which was ok before
> Peterz introduced elf_write_insn() et al. We need to keep elf_write() in
> check.c for this case too.

Yes, you're right. Looks like I messed things up with the rebase. That 
means I might have to move the elf_write() to builtin-check.c.

Thanks for pointing it out.

--
Julien Thierry