diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/mempolicy.c | 10 | ||||
| -rw-r--r-- | mm/mmap.c | 17 |
2 files changed, 15 insertions, 12 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 4baf12e534d..6b1d426731a 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -2065,6 +2065,16 @@ retry_cpuset: } EXPORT_SYMBOL(alloc_pages_current); +int vma_dup_policy(struct vm_area_struct *src, struct vm_area_struct *dst) +{ + struct mempolicy *pol = mpol_dup(vma_policy(src)); + + if (IS_ERR(pol)) + return PTR_ERR(pol); + dst->vm_policy = pol; + return 0; +} + /* * If mpol_dup() sees current->cpuset == cpuset_being_rebound, then it * rebinds the mempolicy its copying by calling mpol_rebind_policy() diff --git a/mm/mmap.c b/mm/mmap.c index f9c97d10b87..14f6bb4830f 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2380,7 +2380,6 @@ detach_vmas_to_be_unmapped(struct mm_struct *mm, struct vm_area_struct *vma, static int __split_vma(struct mm_struct * mm, struct vm_area_struct * vma, unsigned long addr, int new_below) { - struct mempolicy *pol; struct vm_area_struct *new; int err = -ENOMEM; @@ -2404,12 +2403,9 @@ static int __split_vma(struct mm_struct * mm, struct vm_area_struct * vma, new->vm_pgoff += ((addr - vma->vm_start) >> PAGE_SHIFT); } - pol = mpol_dup(vma_policy(vma)); - if (IS_ERR(pol)) { - err = PTR_ERR(pol); + err = vma_dup_policy(vma, new); + if (err) goto out_free_vma; - } - vma_set_policy(new, pol); if (anon_vma_clone(new, vma)) goto out_free_mpol; @@ -2437,7 +2433,7 @@ static int __split_vma(struct mm_struct * mm, struct vm_area_struct * vma, fput(new->vm_file); unlink_anon_vmas(new); out_free_mpol: - mpol_put(pol); + mpol_put(vma_policy(new)); out_free_vma: kmem_cache_free(vm_area_cachep, new); out_err: @@ -2780,7 +2776,6 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap, struct mm_struct *mm = vma->vm_mm; struct vm_area_struct *new_vma, *prev; struct rb_node **rb_link, *rb_parent; - struct mempolicy *pol; bool faulted_in_anon_vma = true; /* @@ -2825,10 +2820,8 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap, new_vma->vm_start = addr; new_vma->vm_end = addr + len; new_vma->vm_pgoff = pgoff; - pol = mpol_dup(vma_policy(vma)); - if (IS_ERR(pol)) + if (vma_dup_policy(vma, new_vma)) goto out_free_vma; - vma_set_policy(new_vma, pol); INIT_LIST_HEAD(&new_vma->anon_vma_chain); if (anon_vma_clone(new_vma, vma)) goto out_free_mempol; @@ -2843,7 +2836,7 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap, return new_vma; out_free_mempol: - mpol_put(pol); + mpol_put(vma_policy(new_vma)); out_free_vma: kmem_cache_free(vm_area_cachep, new_vma); return NULL; |