diff options
Diffstat (limited to 'mm/mprotect.c')
| -rw-r--r-- | mm/mprotect.c | 29 |
1 files changed, 4 insertions, 25 deletions
diff --git a/mm/mprotect.c b/mm/mprotect.c index 03e2cec3e669..f1dc8f8c84ef 100644 --- a/mm/mprotect.c +++ b/mm/mprotect.c @@ -581,7 +581,6 @@ mprotect_fixup(struct vma_iterator *vmi, struct mmu_gather *tlb, long nrpages = (end - start) >> PAGE_SHIFT; unsigned int mm_cp_flags = 0; unsigned long charged = 0; - pgoff_t pgoff; int error; if (newflags == oldflags) { @@ -631,34 +630,14 @@ mprotect_fixup(struct vma_iterator *vmi, struct mmu_gather *tlb, newflags &= ~VM_ACCOUNT; } - /* - * First try to merge with previous and/or next vma. - */ - pgoff = vma->vm_pgoff + ((start - vma->vm_start) >> PAGE_SHIFT); - *pprev = vma_merge(vmi, mm, *pprev, start, end, newflags, - vma->anon_vma, vma->vm_file, pgoff, vma_policy(vma), - vma->vm_userfaultfd_ctx, anon_vma_name(vma)); - if (*pprev) { - vma = *pprev; - VM_WARN_ON((vma->vm_flags ^ newflags) & ~VM_SOFTDIRTY); - goto success; + vma = vma_modify_flags(vmi, *pprev, vma, start, end, newflags); + if (IS_ERR(vma)) { + error = PTR_ERR(vma); + goto fail; } *pprev = vma; - if (start != vma->vm_start) { - error = split_vma(vmi, vma, start, 1); - if (error) - goto fail; - } - - if (end != vma->vm_end) { - error = split_vma(vmi, vma, end, 0); - if (error) - goto fail; - } - -success: /* * vm_flags and vm_page_prot are protected by the mmap_lock * held in write mode. |