diff options
| -rw-r--r-- | mm/rmap.c | 35 |
1 files changed, 16 insertions, 19 deletions
diff --git a/mm/rmap.c b/mm/rmap.c index 78cc46b876e..ebeb95e9150 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -120,6 +120,21 @@ static void anon_vma_chain_free(struct anon_vma_chain *anon_vma_chain) kmem_cache_free(anon_vma_chain_cachep, anon_vma_chain); } +static void anon_vma_chain_link(struct vm_area_struct *vma, + struct anon_vma_chain *avc, + struct anon_vma *anon_vma) +{ + avc->vma = vma; + avc->anon_vma = anon_vma; + list_add(&avc->same_vma, &vma->anon_vma_chain); + + /* + * It's critical to add new vmas to the tail of the anon_vma, + * see comment in huge_memory.c:__split_huge_page(). + */ + list_add_tail(&avc->same_anon_vma, &anon_vma->head); +} + /** * anon_vma_prepare - attach an anon_vma to a memory region * @vma: the memory region in question @@ -175,10 +190,7 @@ int anon_vma_prepare(struct vm_area_struct *vma) spin_lock(&mm->page_table_lock); if (likely(!vma->anon_vma)) { vma->anon_vma = anon_vma; - avc->anon_vma = anon_vma; - avc->vma = vma; - list_add(&avc->same_vma, &vma->anon_vma_chain); - list_add_tail(&avc->same_anon_vma, &anon_vma->head); + anon_vma_chain_link(vma, avc, anon_vma); allocated = NULL; avc = NULL; } @@ -224,21 +236,6 @@ static inline void unlock_anon_vma_root(struct anon_vma *root) mutex_unlock(&root->mutex); } -static void anon_vma_chain_link(struct vm_area_struct *vma, - struct anon_vma_chain *avc, - struct anon_vma *anon_vma) -{ - avc->vma = vma; - avc->anon_vma = anon_vma; - list_add(&avc->same_vma, &vma->anon_vma_chain); - - /* - * It's critical to add new vmas to the tail of the anon_vma, - * see comment in huge_memory.c:__split_huge_page(). - */ - list_add_tail(&avc->same_anon_vma, &anon_vma->head); -} - /* * Attach the anon_vmas from src to dst. * Returns 0 on success, -ENOMEM on failure. |