fuse: use get_user_pages_fast()

Replace uses of get_user_pages() with get_user_pages_fast().  It looks
nicer and should be faster in most cases.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>

2 files changed, 2 insertions, 8 deletions

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index eb7e9423691..4623018e104 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -551,10 +551,7 @@ static int fuse_copy_fill(struct fuse_copy_state *cs)
                 cs->iov++;
                 cs->nr_segs--;
         }
-        down_read(&current->mm->mmap_sem);
-        err = get_user_pages(current, current->mm, cs->addr, 1, cs->write, 0,
-                             &cs->pg, NULL);
-        up_read(&current->mm->mmap_sem);
+        err = get_user_pages_fast(cs->addr, 1, cs->write, &cs->pg);
         if (err < 0)
                 return err;
         BUG_ON(err != 1);
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 4172bfee0f1..29bda0564e6 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -994,10 +994,7 @@ static int fuse_get_user_pages(struct fuse_req *req, const char __user *buf,
         nbytes = min_t(size_t, nbytes, FUSE_MAX_PAGES_PER_REQ << PAGE_SHIFT);
         npages = (nbytes + offset + PAGE_SIZE - 1) >> PAGE_SHIFT;
         npages = clamp(npages, 1, FUSE_MAX_PAGES_PER_REQ);
-        down_read(&current->mm->mmap_sem);
-        npages = get_user_pages(current, current->mm, user_addr, npages, !write,
-                                0, req->pages, NULL);
-        up_read(&current->mm->mmap_sem);
+        npages = get_user_pages_fast(user_addr, npages, !write, req->pages);
         if (npages < 0)
                 return npages;