atomisp: use get_user_pages_fast()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/staging/media/atomisp/pci/atomisp2/hmm/hmm_bo.c b/drivers/staging/media/atomisp/pci/atomisp2/hmm/hmm_bo.c
index 11162f595fc7..2052f8d2f137 100644
--- a/drivers/staging/media/atomisp/pci/atomisp2/hmm/hmm_bo.c
+++ b/drivers/staging/media/atomisp/pci/atomisp2/hmm/hmm_bo.c
@@ -1029,10 +1029,8 @@ static int alloc_user_pages(struct hmm_buffer_object *bo,
         } else {
                 /*Handle frame buffer allocated in user space*/
                 mutex_unlock(&bo->mutex);
-                down_read(&current->mm->mmap_sem);
-                page_nr = get_user_pages((unsigned long)userptr,
-                                         (int)(bo->pgnr), 1, pages, NULL);
-                up_read(&current->mm->mmap_sem);
+                page_nr = get_user_pages_fast((unsigned long)userptr,
+                                         (int)(bo->pgnr), 1, pages);
                 mutex_lock(&bo->mutex);
                 bo->mem_type = HMM_BO_MEM_TYPE_USER;
         }