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mm/hmm: simplify hmm_vma_walk_hugetlb_entry() 

Remove the rather confusing goto label and just handle the fault case
directly in the branch checking for it.

Link: https://lore.kernel.org/r/20200316135310.899364-4-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Christoph Hellwig 2020-03-16 14:53:08 +01:00 committed by Jason Gunthorpe
parent 96268163f9
commit 45050692de
1 changed files with 3 additions and 10 deletions
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13
mm/hmm.c
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@ -559,7 +559,6 @@ static int hmm_vma_walk_hugetlb_entry(pte_t *pte, unsigned long hmask,
bool fault, write_fault;
spinlock_t *ptl;
pte_t entry;
int ret = 0;
ptl = huge_pte_lock(hstate_vma(vma), walk->mm, pte);
entry = huge_ptep_get(pte);
@ -572,8 +571,8 @@ static int hmm_vma_walk_hugetlb_entry(pte_t *pte, unsigned long hmask,
hmm_pte_need_fault(hmm_vma_walk, orig_pfn, cpu_flags,
&fault, &write_fault);
if (fault || write_fault) {
ret = -ENOENT;
goto unlock;
spin_unlock(ptl);
return hmm_vma_walk_hole_(addr, end, fault, write_fault, walk);
}
pfn = pte_pfn(entry) + ((start & ~hmask) >> PAGE_SHIFT);
@ -581,14 +580,8 @@ static int hmm_vma_walk_hugetlb_entry(pte_t *pte, unsigned long hmask,
range->pfns[i] = hmm_device_entry_from_pfn(range, pfn) |
cpu_flags;
hmm_vma_walk->last = end;
unlock:
spin_unlock(ptl);
if (ret == -ENOENT)
return hmm_vma_walk_hole_(addr, end, fault, write_fault, walk);
return ret;
return 0;
}
#else
#define hmm_vma_walk_hugetlb_entry NULL