Looks good,
Reviewed-by: Christoph Hellwig hch@lst.de
Although we could clean this up a tidbit more by removing the start variable:
diff --git a/mm/hmm.c b/mm/hmm.c index d4984a08ed9b..b5b1ed646c2f 100644 --- a/mm/hmm.c +++ b/mm/hmm.c @@ -667,10 +667,9 @@ static const struct mm_walk_ops hmm_walk_ops = { */ long hmm_range_fault(struct hmm_range *range, unsigned int flags) { - unsigned long start = range->start; struct hmm_vma_walk hmm_vma_walk = { .range = range, - .last = start, + .last = range->start, .flags = flags, }; struct mm_struct *mm = range->notifier->mm; @@ -682,9 +681,8 @@ long hmm_range_fault(struct hmm_range *range, unsigned int flags) /* If range is no longer valid force retry. */ if (mmu_range_check_retry(range->notifier, range->notifier_seq)) return -EBUSY; - ret = walk_page_range(mm, start, range->end, &hmm_walk_ops, - &hmm_vma_walk); - start = hmm_vma_walk.last; + ret = walk_page_range(mm, hmm_vma_walk.last, range->end, + &hmm_walk_ops, &hmm_vma_walk); } while (ret == -EBUSY);
if (ret)