diff options
Diffstat (limited to 'mm/ksm.c')
| -rw-r--r-- | mm/ksm.c | 23 |
1 files changed, 5 insertions, 18 deletions
@@ -301,20 +301,6 @@ static inline int in_stable_tree(struct rmap_item *rmap_item) return rmap_item->address & STABLE_FLAG; } -static void hold_anon_vma(struct rmap_item *rmap_item, - struct anon_vma *anon_vma) -{ - rmap_item->anon_vma = anon_vma; - get_anon_vma(anon_vma); -} - -static void ksm_drop_anon_vma(struct rmap_item *rmap_item) -{ - struct anon_vma *anon_vma = rmap_item->anon_vma; - - drop_anon_vma(anon_vma); -} - /* * ksmd, and unmerge_and_remove_all_rmap_items(), must not touch an mm's * page tables after it has passed through ksm_exit() - which, if necessary, @@ -397,7 +383,7 @@ static void break_cow(struct rmap_item *rmap_item) * It is not an accident that whenever we want to break COW * to undo, we also need to drop a reference to the anon_vma. */ - ksm_drop_anon_vma(rmap_item); + put_anon_vma(rmap_item->anon_vma); down_read(&mm->mmap_sem); if (ksm_test_exit(mm)) @@ -466,7 +452,7 @@ static void remove_node_from_stable_tree(struct stable_node *stable_node) ksm_pages_sharing--; else ksm_pages_shared--; - ksm_drop_anon_vma(rmap_item); + put_anon_vma(rmap_item->anon_vma); rmap_item->address &= PAGE_MASK; cond_resched(); } @@ -554,7 +540,7 @@ static void remove_rmap_item_from_tree(struct rmap_item *rmap_item) else ksm_pages_shared--; - ksm_drop_anon_vma(rmap_item); + put_anon_vma(rmap_item->anon_vma); rmap_item->address &= PAGE_MASK; } else if (rmap_item->address & UNSTABLE_FLAG) { @@ -949,7 +935,8 @@ static int try_to_merge_with_ksm_page(struct rmap_item *rmap_item, goto out; /* Must get reference to anon_vma while still holding mmap_sem */ - hold_anon_vma(rmap_item, vma->anon_vma); + rmap_item->anon_vma = vma->anon_vma; + get_anon_vma(vma->anon_vma); out: up_read(&mm->mmap_sem); return err; |