diff options
Diffstat (limited to 'mm/userfaultfd.c')
| -rw-r--r-- | mm/userfaultfd.c | 48 |
1 files changed, 32 insertions, 16 deletions
diff --git a/mm/userfaultfd.c b/mm/userfaultfd.c index 8bcb501bce60..81192701964d 100644 --- a/mm/userfaultfd.c +++ b/mm/userfaultfd.c @@ -371,6 +371,36 @@ extern ssize_t __mcopy_atomic_hugetlb(struct mm_struct *dst_mm, bool zeropage); #endif /* CONFIG_HUGETLB_PAGE */ +static __always_inline ssize_t mfill_atomic_pte(struct mm_struct *dst_mm, + pmd_t *dst_pmd, + struct vm_area_struct *dst_vma, + unsigned long dst_addr, + unsigned long src_addr, + struct page **page, + bool zeropage) +{ + ssize_t err; + + if (vma_is_anonymous(dst_vma)) { + if (!zeropage) + err = mcopy_atomic_pte(dst_mm, dst_pmd, dst_vma, + dst_addr, src_addr, page); + else + err = mfill_zeropage_pte(dst_mm, dst_pmd, + dst_vma, dst_addr); + } else { + if (!zeropage) + err = shmem_mcopy_atomic_pte(dst_mm, dst_pmd, + dst_vma, dst_addr, + src_addr, page); + else + err = shmem_mfill_zeropage_pte(dst_mm, dst_pmd, + dst_vma, dst_addr); + } + + return err; +} + static __always_inline ssize_t __mcopy_atomic(struct mm_struct *dst_mm, unsigned long dst_start, unsigned long src_start, @@ -487,22 +517,8 @@ retry: BUG_ON(pmd_none(*dst_pmd)); BUG_ON(pmd_trans_huge(*dst_pmd)); - if (vma_is_anonymous(dst_vma)) { - if (!zeropage) - err = mcopy_atomic_pte(dst_mm, dst_pmd, dst_vma, - dst_addr, src_addr, - &page); - else - err = mfill_zeropage_pte(dst_mm, dst_pmd, - dst_vma, dst_addr); - } else { - err = -EINVAL; /* if zeropage is true return -EINVAL */ - if (likely(!zeropage)) - err = shmem_mcopy_atomic_pte(dst_mm, dst_pmd, - dst_vma, dst_addr, - src_addr, &page); - } - + err = mfill_atomic_pte(dst_mm, dst_pmd, dst_vma, dst_addr, + src_addr, &page, zeropage); cond_resched(); if (unlikely(err == -EFAULT)) { |