1 files changed, 5 insertions, 12 deletions

diff --git a/fs/bio.c b/fs/bio.c
index 88322b066acb..8000e2fa16cb 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -77,11 +77,8 @@ struct bio_vec *bvec_alloc_bs(gfp_t gfp_mask, int nr, unsigned long *idx, struct
          */
 
         bvl = mempool_alloc(bs->bvec_pools[*idx], gfp_mask);
-        if (bvl) {
-                struct biovec_slab *bp = bvec_slabs + *idx;
-
-                memset(bvl, 0, bp->nr_vecs * sizeof(struct bio_vec));
-        }
+        if (bvl)
+                memset(bvl, 0, bvec_nr_vecs(*idx) * sizeof(struct bio_vec));
 
         return bvl;
 }
@@ -149,7 +146,7 @@ struct bio *bio_alloc_bioset(gfp_t gfp_mask, int nr_iovecs, struct bio_set *bs)
                                 goto out;
                         }
                         bio->bi_flags |= idx << BIO_POOL_OFFSET;
-                        bio->bi_max_vecs = bvec_slabs[idx].nr_vecs;
+                        bio->bi_max_vecs = bvec_nr_vecs(idx);
                 }
                 bio->bi_io_vec = bvl;
         }
@@ -721,12 +718,8 @@ static struct bio *__bio_map_user_iov(struct request_queue *q,
                 const int local_nr_pages = end - start;
                 const int page_limit = cur_page + local_nr_pages;
                 
-                down_read(&current->mm->mmap_sem);
-                ret = get_user_pages(current, current->mm, uaddr,
-                                     local_nr_pages,
-                                     write_to_vm, 0, &pages[cur_page], NULL);
-                up_read(&current->mm->mmap_sem);
-
+                ret = get_user_pages_fast(uaddr, local_nr_pages,
+                                write_to_vm, &pages[cur_page]);
                 if (ret < local_nr_pages) {
                         ret = -EFAULT;
                         goto out_unmap;