diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-16 10:09:24 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-16 10:09:24 +0300 |
| commit | 500f0716b5f7fd6b0ff3d045588c7588ce2eee1d (patch) | |
| tree | 05cfa2e77069af443f06bcfbf327f9aa2050eec7 /fs/userfaultfd.c | |
| parent | 4eb44f69e77141992e305d9e75e021b196071cdd (diff) | |
| parent | 9d3cce1e8b8561fed5f383d22a4d6949db4eadbe (diff) | |
| download | linux-500f0716b5f7fd6b0ff3d045588c7588ce2eee1d.tar.xz | |
Merge 4.18-rc5 into usb-next
We need the USB fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/userfaultfd.c')
| -rw-r--r-- | fs/userfaultfd.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c index 123bf7d516fc..594d192b2331 100644 --- a/fs/userfaultfd.c +++ b/fs/userfaultfd.c @@ -222,24 +222,26 @@ static inline bool userfaultfd_huge_must_wait(struct userfaultfd_ctx *ctx, unsigned long reason) { struct mm_struct *mm = ctx->mm; - pte_t *pte; + pte_t *ptep, pte; bool ret = true; VM_BUG_ON(!rwsem_is_locked(&mm->mmap_sem)); - pte = huge_pte_offset(mm, address, vma_mmu_pagesize(vma)); - if (!pte) + ptep = huge_pte_offset(mm, address, vma_mmu_pagesize(vma)); + + if (!ptep) goto out; ret = false; + pte = huge_ptep_get(ptep); /* * Lockless access: we're in a wait_event so it's ok if it * changes under us. */ - if (huge_pte_none(*pte)) + if (huge_pte_none(pte)) ret = true; - if (!huge_pte_write(*pte) && (reason & VM_UFFD_WP)) + if (!huge_pte_write(pte) && (reason & VM_UFFD_WP)) ret = true; out: return ret; |