1 files changed, 12 insertions, 31 deletions

diff --git a/mm/shmem.c b/mm/shmem.c
index 51b3d6ccdda..88c6685f16b 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1025,53 +1025,34 @@ out:
 	return err;
 }
 
-static struct page *shmem_swapin_async(struct shared_policy *p,
+static struct page *shmem_swapin(struct shmem_inode_info *info,
 				       swp_entry_t entry, unsigned long idx)
 {
-	struct page *page;
 	struct vm_area_struct pvma;
+	struct page *page;
 
 	/* Create a pseudo vma that just contains the policy */
-	memset(&pvma, 0, sizeof(struct vm_area_struct));
-	pvma.vm_end = PAGE_SIZE;
+	pvma.vm_start = 0;
 	pvma.vm_pgoff = idx;
-	pvma.vm_policy = mpol_shared_policy_lookup(p, idx);
+	pvma.vm_ops = NULL;
+	pvma.vm_policy = mpol_shared_policy_lookup(&info->policy, idx);
+	swapin_readahead(entry, 0, &pvma);
 	page = read_swap_cache_async(entry, &pvma, 0);
 	mpol_free(pvma.vm_policy);
 	return page;
 }
 
-static struct page *shmem_swapin(struct shmem_inode_info *info,
-				 swp_entry_t entry, unsigned long idx)
-{
-	struct shared_policy *p = &info->policy;
-	int i, num;
-	struct page *page;
-	unsigned long offset;
-
-	num = valid_swaphandles(entry, &offset);
-	for (i = 0; i < num; offset++, i++) {
-		page = shmem_swapin_async(p,
-				swp_entry(swp_type(entry), offset), idx);
-		if (!page)
-			break;
-		page_cache_release(page);
-	}
-	lru_add_drain();	/* Push any new pages onto the LRU now */
-	return shmem_swapin_async(p, entry, idx);
-}
-
-static struct page *
-shmem_alloc_page(gfp_t gfp, struct shmem_inode_info *info,
-		 unsigned long idx)
+static struct page *shmem_alloc_page(gfp_t gfp, struct shmem_inode_info *info,
+					unsigned long idx)
 {
 	struct vm_area_struct pvma;
 	struct page *page;
 
-	memset(&pvma, 0, sizeof(struct vm_area_struct));
-	pvma.vm_policy = mpol_shared_policy_lookup(&info->policy, idx);
+	/* Create a pseudo vma that just contains the policy */
+	pvma.vm_start = 0;
 	pvma.vm_pgoff = idx;
-	pvma.vm_end = PAGE_SIZE;
+	pvma.vm_ops = NULL;
+	pvma.vm_policy = mpol_shared_policy_lookup(&info->policy, idx);
 	page = alloc_page_vma(gfp, &pvma, 0);
 	mpol_free(pvma.vm_policy);
 	return page;