diff options
| -rw-r--r-- | mm/mmap.c | 12 |
1 files changed, 2 insertions, 10 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 82db4fc0a9d3..52b2f6e16f6f 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2884,7 +2884,7 @@ int insert_vm_struct(struct mm_struct *mm, struct vm_area_struct *vma) * using the existing file pgoff checks and manipulations. * Similarly in do_mmap_pgoff and in do_brk. */ - if (!vma->vm_file) { + if (vma_is_anonymous(vma)) { BUG_ON(vma->anon_vma); vma->vm_pgoff = vma->vm_start >> PAGE_SHIFT; } @@ -3027,21 +3027,13 @@ static int special_mapping_fault(struct vm_area_struct *vma, pgoff_t pgoff; struct page **pages; - /* - * special mappings have no vm_file, and in that case, the mm - * uses vm_pgoff internally. So we have to subtract it from here. - * We are allowed to do this because we are the mm; do not copy - * this code into drivers! - */ - pgoff = vmf->pgoff - vma->vm_pgoff; - if (vma->vm_ops == &legacy_special_mapping_vmops) pages = vma->vm_private_data; else pages = ((struct vm_special_mapping *)vma->vm_private_data)-> pages; - for (; pgoff && *pages; ++pages) + for (pgoff = vmf->pgoff; pgoff && *pages; ++pages) pgoff--; if (*pages) { |