Re: [GIT PULL] KVM changes for 3.12

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On Wed, Sep 04, 2013 at 06:08:08PM -0700, Linus Torvalds wrote:
> On Tue, Sep 3, 2013 at 5:10 AM, Gleb Natapov <gleb@xxxxxxxxxx> wrote:
> >
> > This pull request adds tlb_gather_mmu() caller in S390 code, but 2b047252
> > in your tree added another parameter to the function, so the patch bellow
> > have to be applied during merge to resolve the conflicts. The patch was
> > used in linux-next for awhile.
> 
> Hmm. Fine. Except:
> 
> >         /* Reallocate the page tables with pgstes */
> >         mm->context.has_pgste = 1;
> > -       tlb_gather_mmu(&tlb, mm, 0);
> > +       tlb_gather_mmu(&tlb, mm, 0, TASK_SIZE);
> >         page_table_realloc(&tlb, mm, 0, TASK_SIZE);
> >         tlb_finish_mmu(&tlb, 0, -1);
> >         up_write(&mm->mmap_sem);
> 
> Realistically, the begin/end arguments to tlb_gather_mmu() and
> tlb_finish_mmu() should match. In fact, I considered getting rid of
> the ones to tlb_finish_mmu() because they are kind of pointless these
> days (but didn't, because I wanted to keep the patches minimal).
> 
> And in your case they don't. Which implies a certain amount of confusion.

Actually they do match in our internal version of the merge conflict. It
was just a copy-paste error from me when sending the merge resolution patch.
Since the fix contained two changes lines within the same hunk it was
hard to get right.. oh well.. :)

Thanks for fixing it!

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