diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2013-09-12 01:20:14 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-12 02:57:00 +0400 |
| commit | ef0855d334e1e4af7c3e0c42146a8479ea14a5ab (patch) | |
| tree | 5955b0424bb392e1949acc0ad5066cb461bef867 /mm | |
| parent | c07303c0af38ffb1e5fd9b5ff37d0798298a7acf (diff) | |
| download | linux-ef0855d334e1e4af7c3e0c42146a8479ea14a5ab.tar.xz | |
mm: mempolicy: turn vma_set_policy() into vma_dup_policy()
Simple cleanup. Every user of vma_set_policy() does the same work, this
looks a bit annoying imho. And the new trivial helper which does
mpol_dup() + vma_set_policy() to simplify the callers.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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 4baf12e534d1..6b1d426731ae 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 f9c97d10b873..14f6bb4830f7 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; |